{% load static %}
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This DEMO shows how to configure complex mappings between an incoming variable and the frequency output. In this example different regions on the X-axis map to either sliding pitches or musical scales. In addition to the pitch-control, the cutoff frequency can be controlled by moving the pointer on the Y-axis.
For detailed information, please read the comments in the code: audio.xml
WebAudioXML is a PhD research project invented and maintained by Hans Lindetorp. For more info, turorials, documentation and download links, please visit https://github.com/hanslindetorp/WebAudioXML


Quicklinks
If you know what you are doing, you can directly skip to:
Why a new plug-in?
Until now, debugging with the J-Link probe in Eclipse was done via the GDB Hardware Debugging plug-in. For experimental projects it was more or less ok, but for serious development it was quite tedious. The missing features, that were added to this plug-in, are:
- transparent integration of the GDB server, automatically started/stopped for each debug session
- advanced graphical user interface to configure most GDB client and GDB server SEGGER specific options
- transparent integration of the semihosting and Serial Wire Viewer (SWV) window as a standard Eclipse console
- a functional restart button, to reset the target and restart the debugging session, without having to rewrite the executable image
- direct use of project toolchain definition (prefix, suffix, path) to simplify configuration of the GDB client
- macro based J-Link folder path definition, for simplified management of the GDB server location when upgrades to new SEGGER versions are released
- support for SWO registers configuration to match a given system clock frequency
Prerequisites
Before being able to use the J-Link probe with Eclipse Embedded CDT, you must separately install:
- the J-Link debugging plug-in
- the GDB debugger (client) application, as part of a GNU toolchain
- the SEGGER J-Link GDB server and drivers.
If you did not do it yet, please follow the instructions in the J-Link install page and return when completed.
The presence of a GDB as part of a GNU toolchain is mandatory, and it is recommended that the version of the GDB client matches the toolchain. Generally only debugging .elf applications is possible, and these applications must be compiled to include GNU compatible debugging information (like dwarf).
Non-GNU toolchains
Debugging applications generated by non-GNU toolchains (like the obsolete Arm CC), although not completely excluded, is not supported.
How to use the J-Link plug-in
Define the J-Link folder location
Before starting work with the J-Link tools, it is required to define the path to the J-Link folder.
-
in the Eclipse menu, go to (Window →) Preferences → MCU → Global SEGGER J-Link Path (or Workspace SEGGER J-Link Path)
- click the Restore Defaults button
- the plug-in will suggest the default values computed when Eclipse started; if a new version of SEGGER was installed while Eclipse was active, restart Eclipse and click again the Restore Defaults button
- check the Executable field; it must define the name of the command line J-Link GDB server executable; in most cases it should be set correctly; if not, edit it to match the correct name;
- macOS notice: somewhere around version 6.30, SEGGER changed the name of
the executable to
JLinkGDBServerCLExe
, the plug-in was updated to this new name, but older installs will continue to default toJLinkGDBServer
; if needed, update it to the new name; - check the Folder field; it must point to the actual folder where the
J-Link tools were installed on your platform, for example
/Applications/SEGGER/JLink
is a link to the latest version installed on macOS - click the OK button
- Windows warning: please note that on Windows there are two GDB
server executables, one with a UI and one to be used as a command line
(
JLinkGDBServerCL.exe
); you obviously need to configure the executable field to point toJLinkGDBServerCL.exe
.
By default, the GDB server is defined as
${jlink_path}/${jlink_gdbserver}
; these two macros are automatically
set by the above preference page; for portability reasons, it is
recommended to keep this definition in all your debug configurations,
and also to have a single place to update the path when a new version
of the J-Link tools is released.
Associate a device to the project
Although not absolutely mandatory, it is recommended to associate a device to the project, so that creating the debugger launch configuration will automatically fill-in the device name.
Follow the steps in the separate page Associate a device to the project and return to this page to continue.
Create the debugger launch configuration
Being a standard debugger, this plug-in also uses the Eclipse standard method of creating debugger configurations for each application. After you successfully build your application, you can create a new debug configuration following these steps:
- select the project
- build it and ensure the executable file is available
- expand either the Debug or the Release folder and select the executable you want to debug
-
in the Eclipse menu, go to Run → Debug Configurations… or select the down arrow at the right of the bug icon.
-
double click the GDB SEGGER J-Link Debugging group, or select it and click the top leftmost New button.
- a multi-tab page will be displayed;
-
if you started this procedure with the project selected and the project was previously built, the first tab, named Main, should be already filled in with the project name (for example blink1) and the application file name and location (for example
Debug/blink1.elf
). -
click the second tab, named Debugger, which contains the configuration options required to start the GDB server and the GDB client.
- the only field that usually requires attention is the Device name, which must identify the processor family; if you assigned the device to the project, this field is automatically filled-in; usually this name is the family name; if you do not know it for your processor, follow the link at the right and copy/paste the string from the SEGGER web page;
- for portability reasons, the GDB server and GDB client executables are defined using variables; it is highly recommended to keep these definitions;
- the
${cross_prefix}
and the${cross_suffix}
variables are defined automatically using the toolchain definitions; unless you are debugging a project-less ELF, leave them as is; - the values of the
${jlink_path}
and${jlink_gdbserver}
can be manually edited in the Eclipse menu → (Window →) Preferences → MCU → Global SEGGER J-Link Path configuration page (if you do not find this page, upgrade the plug-ins); - the Connect to running target option allows to start a debug session without performing any reset or program download, so that the target will continue to run unaffected, until explicitly halted by the debugger (Note: this option requires the latest plug-in and SEGGER versions);
-
click the third tab, named Startup, which contains specific J-Link options used to configure the debug session.
- if you built the project with retargetting support for ITM/SWO, enter the CPU frequency and the desired SWO sampling frequency; for this to work with J-Link, the SWO sampling frequency must be a submultiple of 6MHz (6000000, 3000000, 2000000, 1500000, 1000000, etc) and the CPU frequency must be a multiple of the SWO sampling frequency (these apparently complicated requirements end up as a pre-scaler value in an Arm register);
- for most applications running from flash, leave the Pre-run reset and halt enabled, this will issue a new reset after programming the flash and just before starting execution. Due to some complicated technical details, when the debugger tries to reset some cores, execution cannot be halted immediately, and part of the initialisation routine is executed. Then the flash is written with the new application, it is not correct to directly start execution, since part of a foreign initialisation sequence, that is not part of the current application, was executed; to be sure the application starts correctly, it is necessary to issue a new reset. Please note that this does not apply for applications running from RAM, since the reset may damage the RAM content;
- although not mandatory, it is recommended to change the location where the launcher file is stored; for this,
- select the Common tab,
- set the Save as: field to Shared file
- accept the current project name.
- click the Apply button
- click the Close button
With the above settings, the debug configuration will be saved in the project, not in the workspace storage.
Start a debug session
Before starting a debug session, be sure that:
- the J-Link debugger is connected to a high speed USB port, preferably directly to the computer, not via hubs which share the bandwidth with ther traffic intensive devices, like disks, wi-fi, video cameras, etc.
- the wide JTAG flat cable is connected both to the J-Link and the target device
- the target device is powered on
With all the above steps completed properly, you can start the debug session:
- in the Eclipse menu, go to Run → Debug Configurations…
- if necessary, expand the GDB SEGGER J-Link Debugging group
- select the newly defined configuration
- click the Debug button
Alternatively, on subsequent runs, you can use the bug specific icon. By default this will start the previously used debug launch configuration; to start a different configuration, use the down arrow button:
This will open a new window where you can select the desired debug configuration:
If everything is ok, after a few seconds required to start the server, to allow it to connect to the target, start the gdb client, download the application and start the debugging session, you should see something like this:
The new debug session, with three consoles.
Since the first breakpoint was set in the Debugger tab to main,
the execution stopped right at the beginning of the main()
function,
which in this case is a tracing printf()
.
Debug operations
Once the debug session started and execution stopped in the first
breakpoint (by default set at the beginning of the main()
function),
you can perform any debug operation you need.
The most common operations are:
- single step over one source instruction (click the Step Over button)
- single step into the next function called (click the Step Into button)
- single step out of the current function (click the Step Return button)
- set breakpoints (click the grey side area at the left of the source lines)
- run (click the Resume button)
- halt a running program (click the Suspend button)
- inspect processor registers (use the Registers view)
- inspect memory (use the Memory view)
For more details please read the Running and debugging projects section in the Eclipse documentation.
View consoles
Each debug process has a dedicated console, to display its standard output and standard error, or to get input for the standard input.
To see the console of any process, select the process in the top left window. For example the server console might look like this:
Similarly for the tracing console:
Show console when standard out/error change
This is the default Eclipse behaviour when multiple consoles are active, to automatically switch to the latest updated. In our case, especially when the Semihosting/SWV console is also active, the focus will jump between windows, making things impossible to follow.
This mode can be identified by the status of the buttons on the right side of the Debugging view.
To make the display stable on the desired console, disable both buttons. To switch between consoles, select them either in the top left Debug view, or using the right button, as shown above.
The Restart button
Apparently not a big deal, but quite useful for repeated debug sessions, the Restart button can be used at any time during a debug session, and the result is that a reset is dispatched to the target board via the JTAG/SWD interface and the debug session is restarted.
Using a remote GDB server
If, for any reason, you need to run the GDB server on a remote machine (for example the development board is connected via J-Link to a machine in your office, but you are in another location), you can still use the plug-in to run debugging session. For this to work, just disable Start the GDB server locally in the Debugger tab and instead of localhost for the Host name or IP address, enter the name or address where the GDB server can be accessed.
Then you must manually start the JLinkGDBServer process on the remote machine and only then you can start the debugging session.
Connect to running target
This is an advanced feature, allowing debugging of a target that was started outside the debugger.
To make this possible, enable the Connect to running target option in the Debugger tab:
With this option, the J-Link plug-in will no longer reset the target and will no longer download the code into the target’s memory, leaving the target virtually unaffected, even after the debug session is started.
To start interacting with the target, it must be halted, using the debugger’s Halt command. After examining the target’s memory, setting breakpoints, etc, execution can be resumed, and the debug session terminated, leaving the target running.
Using multiple J-Link probes at once
For advanced applications it is sometimes required to start multiple debug sessions, with multiple J-Link probes, on the same computer. SEGGER J-Link is perfectly capable of doing this, both over USB or TCP/IP.
For this, multiple instances of Eclipse are required, and each one must be configured with different TCP/IP ports for the GDB/SWO/Telnet services, and also each must be configured with the serial number of the specific J-Link probe, printed on the back of the probe. For TCP/IP connected J-Link, instead of the serial number, use the IP address.
No GDB initialisation files loaded
For having a total control of the debugging session, the debugging
plug-ins start the GDB client process with the --nx
option, which
prevents the execution of the commands found in any initialization
file; none of the standard files (system.gdbinit
, ~/.gdbinit
,
./.gdbinit
) are loaded.
To add more commands to the GDB initialisation sequence, use the Commands: field in the GDB Client Setup section:
All commands listed here are passed to the GDB client. By convention,
commands prefixed with mon
will be further passed from the GDB client
to the GDB server, in this case the J-Link GDB server.
Troubleshooting
Missing or wrong jlink_path
The most common failure to start a debug session is a missing or incorrect J-Link path. Without it, the launching sequence will complain Cannot run program “/JLinkGDBServer”.
Define the jlink_path as instructed above and the session should start properly.
Wrong device selection
If the devices that you selected in the plug-in does not match the device physically connected, the GDB server session fails and the entire debug session is aborted. You can identify this case by studying the GDB server log.
Select the device properly and the session should start properly.
J-Link hangups
Although SEGGER took special measures to avoid J-Link firmware hangups, in case you suspect such a situation (the JLinkGDBServer refuses to connect to the USB device, or to the target), it might help to power cycle the J-Link, by disconnecting and reconnecting the USB cable.
Cannot start applications running from RAM
Please be sure you disable the Pre-run reset and halt option in the Startup tab, this usually does not preserve the RAM content.
Error while launching command: gdb –version
If you kept the GDB client executable defined as
${cross_prefix}gdb${cross_suffix}
, the above error means that the
macros could not be substituted with the correct prefix/suffix. There
can be several reasons for this. One might be that you did not associate
the debug launcher to a project. Check the Main tab and be sure
the field Project: refer to the correct project. Next time when you
create the debug configuration, be sure you follow the above suggestions
(select .elf, Debug Configurations, double click on
GDB SEGGER J-Link Debugging. Another reason is presented below.
Using a different build plug-in or a compiler not supported
Another reason for not being able to start the debug session is that
your project was not build with the Eclipse Embedded CDT managed build
plug-in. If you are using another build plug-in, or an exotic/obsolete
toolchain, you need to replace ${cross_prefix}gdb${cross_suffix}
with
the actual name of the gdb client available in your toolchain, since the
${cross_*}
macros are available only in projects managed by the
Eclipse Embedded CDT build plug-in.
More info
Although the plug-in takes care of most of the configuration options, and provides reasonable defaults for the usual cases, it is recommended to read the SEGGER manuals, available from the Doc folder in the installation location or directly from the SEGGER J-Link page.
Comments on the content of this page that might be useful for other readers are welcomed here. For question and general support, please use the project forums.


BABY FEARS
Glasgow mum-to-be told to ‘prepare for worst’ for her unborn baby after botched tummy tuck triggered deadly sepsis
by Lucy JonesAN expectant mum is terrified her unborn baby is at risk - after a botched tummy tuck triggered sepsis and left her an hour from death.
Kerrie Wilkes, 27, admitted she wanted to be 'Insta perfect' when she splashed out £4,200 on the op, also known as abdominoplasty, in 2017.
However, her immune system went into overdrive following the surgery in Poland and she was rushed to hospital when she returned home to Glasgow.
It was then she medics diagnosed her with deadly sepsis, and told her had she waited an hour, she would have died.
The potentially life-threatening infection started in her belly button, which had to be reconstructed.
Kerrie, from Glasgow, feared she would never be able to have children.
However, she is now expecting her first child in April 2020 - although she is terrified the cosmetic surgery may put her unborn baby at risk.
Kerrie said: "I didn't think I could even have children after the infection, because it was so bad.
"Because the infection began in my stomach through my belly button, my belly button opened up and I had to have a new one constructed.
Every morning I wake up and feel my stomach to make sure it's still intactKerrie Wilkes
"With this being attached to the umbilical cord, my doctors have told me that my baby is potentially always at risk.
"A few weeks ago I had an infection, but we managed to stop it before it reached my baby.
"Doctors have told me my belly button could potentially open up before birth, so I need to prepare for the worst.
"Every morning I wake up and feel my stomach to make sure it's still intact."
Prepare for the worst
At the time she went under the knife, Kerrie was running a successful business, J'adore La Mode in Parkhead Cross.
She was single, had her own flat, and felt glamorous - but admitted she was chasing an idea of perfection inspired by social media, where a friend had posted photos following a similar op.
But after the surgery, she was forced to close her business.
Kerrie said: "I had lost a lot of weight, I was looking good, was single and had my own flat and business.
"I was striving for perfection and I just wanted to be this perfect Insta girl, going under the knife.
"My tummy tuck cost me about £4,200.
"I thought it would be the best thing ever and it turned out to be the worst thing that ever happened to me.

"I was successful in business and achieved a lot but I took so much time away from work being ill that no one could help me.
I thought it would be the best thing ever and it turned out to be the worst thing that ever happened to meKerrie Wilkes
"I went abroad and now I rely on doctors here to help me.
Kerrie is now urging people to stop going abroad for plastic surgery and to seek advice from an NHS doctor if you want to make alterations to your body.
She said: "People have to stop going abroad for plastic surgery and it would mean the world to me if it was out more.
"I hate the thought of someone getting surgery.
Warning signs
"If you do want the surgery I recommend only Ross Hall, the Nuffield, or an NHS doctor.
"You need to go to someone that you trust.
"I appreciate my life now and live every minute of it.
"I just want to have a healthy birth and if my baby survives this I'll be so happy again."
With hindsight the mum-to-be admitted she ignored warning signs, including the location of the clinic.
Kerrie said: "The surgery was horrible.
"The building I was getting my surgery in was in a business park.
"I didn't think about it because I wanted it done so badly.
"I woke up and thought, 'what have I done?'.
"I was shaking, I couldn't breathe, and was offered no medical assistance at all.
"I was asking the nurses, 'where are my antibiotics?
Signs of sepsis
Sepsis is a life-threatening reaction to an infection.
It happens when your immune system overreacts to an infection and starts to damage your body's own tissues and organs.
Sepsis can be hard to spot. There are lots of possible symptoms.
Symptoms can be vague. They can be like symptoms of other conditions, including flu or a chest infection.
The NHS urges people to call 999 or go to A&E if an adult or older child has any of these symptoms of sepsis:
- Acting confused, slurred speech or not making sense
- Blue, pale or blotchy skin, lips or tongue
- A rash that does not fade when you roll a glass over it, the same as meningitis
- Difficulty breathing, breathlessness or breathing very fast
Sespis can be especially hard to spot in babies and young children, people with dementia, people with a learning difficult and people who have difficulty communicating.
Source: NHS
"It was horrific, a nightmare."
Chris Hill, a consultant plastic surgeon and a member of the British Association of Plastic Reconstructive and Aesthetic Surgeons (BAPRAS), said: "Every cosmetic surgery or procedure has potential complications whether it is at home or abroad, and patients need to be aware that risks are involved in having surgery of any type.
"I would not recommend going abroad for plastic surgery.
"There are significant dangers in going abroad for cosmetic surgery.
"If they are going to do it, BAPRAS has a checklist of recommendations to make sure of before you go.
"Who knows what type of cleanliness or qualifications the surgeon who worked on Kerrie had?
"If you are going to go abroad, please at least make sure that you are going abroad safely."


You can report a bug that happened or a feature you would like to see in this extension. If you want you can also highlight a section of the page and send it along.
When clicking the submit buton you will be taken to the github website where you can file an issue. All nessecary files (the image and your settings) will be downloaded, after which you can drop them on the report issue page. For this to be possible you need to accept the downloads permission window that will pop up.
Your CRM and settings will be included in the report that will be publicly visible, if you do not wish this you can report a bug or suggest a feature by sending an email to this address.


Write to home secretary asking what he is going to do about the release of innocent prisoners such as kevin.
Raise the case and issues with your local m.p.
Raise the case and issues with your local m.s.p. as kevin isn't the only prisoner from scotland protesting his innocence from an english prison.
Raise the case and issues with your union.
Consider a benefit concert or social. Kevin needs to feel supported and know that he isn't forgotten.
Dedicate a song, dance, music to kevin in the course of your working or musical life.
Pray for kevin and other innocent prisoners publicly and privately
Inform yourself on the affects of specific learning difficulties on peoples'lives.
Make use of the website which will carry not only information about the case but also information on specific learning difficulties, prayer resources, and information that may be useful to other people involved in the struggle of innocent prisoners.
Contribute to campaign funds
Last but not least, send messages of support to kevin (B80521) at H.M.P. elmley, isle of sheppey, me12.


Choose a .zip file containing the index.html and assets you want iframed or drag it onto the box below.
.zip
index.html
file list
/uploader/embed///giv-0000/


{{ partial "head/index.html" }}
{{ partial "layout/header.html" . }}
{{ partial "experience/container.html" .Site.Data.experience }} {{ partial "education/container.html" .Site.Data.education }} {{ partial "interests/container.html" .Site.Data.interests }}
{{ partial "layout/footer.html" . }} {{ partial "scripts.html" }}


welcome in competition
thank you for subscribing to competition
Submitted<EMAIL_ADDRESS>Submitted: John


| ZotWeb | book | |
| Src Url | [[Schön]] (2017) | |
A leading M.I.T. social scientist and consultant examines five professions - engineering, architecture, management, psychotherapy, and town planning - to show
The reflective practice of design teams
Citer: (Valkenburg & Dorst, 1998)
FTag: Valkenburg-Dorst-1998
APA7: Valkenburg, R., & Dorst, K. (1998). The reflective practice of design teams. Design Studies, _19_(3), 249–271. https://doi.org/10.1016/S0142-694X(98)00011-800011-8)
Keywords: design activity, teamwork, reflection-in-action, protocol analysis, research method
Mots clés: activité de conception, travail en équipe, réflexion en action, analyse de protocole, méthode de recherche
-------------------------------------------------------
Schon’s paradigm of reflective practice
-------------------------------------------------------
[[Schon]]
explain the relation between the protocol and the description of the team according to the mechanism of reflective practice
all the interesting moments occurred when the team makes a transition between frames
to improve design theory and education systematically we need to make a transition from this pure description to prescription. We need to further analyze and discuss the general patterns that occur in the described team
#limite
3. 4 Team ‘Tecc’
four activities (naming, framing, moving and reflecting) and their relations: the ‘mechanism of reflective practice’. The designers start by naming the relevant issues in the design situation, framing the problem in a certain way, making moves towards a solution, and reflecting on those moves and the current frame.
#CT
4 Activities
* Naming
* Framing
* Moving
* Reflecting
[[Schon]]
develop tools and guidelines to improve team design practice
understand
analyze and describe
new description method, based on Schon’s theory of reflective practice
#metho #results
This method was tested by applying it in the description of the activities of two design teams. The description method proves to be very useful, in that it allows a concise description of a design project in which the elements vital to the understanding of the design progress are conserved
#metho
Comparing the obtained descriptions of these two teams designing reveals different patterns of behaviour
#results
in-depth analysis of team design behaviour.
#objectives
“a kind of knowing is inherent in intelligent action” (Schön, 2017. p. 50)
[...] implicit knowledge cannot be described within the prevalent methodological paradigm of technical rationality.
#problematic
implicit ‘knowing-in-action’ is difficult to describe
#problematic
explicit reflection that guides the development of one’s knowing-in- action habits. This he calls reflection-in-action.
#CT
Scho ̈ n’s theory is based on a constructionis
[...] little of the research methods currently used in design methodology is suited for our purposes. The com- plexity of design has always made it difficult to study real life design activity, and none of the existing research methods to observe and describe designing provides us with data that is rich enough, in that it spans both the design process and relevant aspects of the design context.
#problematic
basic elements of design activities are actions
Schon’s theory is based on a constructionist view of human perception and thought processes: through the execution of ‘move-testing experiments’ (involving action and reflection), a designer is actively constructing a view of the world based on his/her experiences.
#CT


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compiled\ember-runtime\lib\mixins\observable.js
Maintainability
81.58
Lines of code
475
Difficulty
31.80
Estimated Errors
1.22
Function weight
By Complexity
By SLOC
/** @module ember @submodule ember-runtime */ 'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; } var _emberMetalCore = require('ember-metal/core'); var _emberMetalCore2 = _interopRequireDefault(_emberMetalCore); // Ember.assert var _emberMetalProperty_get = require('ember-metal/property_get'); var _emberMetalProperty_set = require('ember-metal/property_set'); var _emberMetalGet_properties = require('ember-metal/get_properties'); var _emberMetalGet_properties2 = _interopRequireDefault(_emberMetalGet_properties); var _emberMetalSet_properties = require('ember-metal/set_properties'); var _emberMetalSet_properties2 = _interopRequireDefault(_emberMetalSet_properties); var _emberMetalMixin = require('ember-metal/mixin'); var _emberMetalEvents = require('ember-metal/events'); var _emberMetalProperty_events = require('ember-metal/property_events'); var _emberMetalObserver = require('ember-metal/observer'); var _emberMetalComputed = require('ember-metal/computed'); var _emberMetalIs_none = require('ember-metal/is_none'); var _emberMetalIs_none2 = _interopRequireDefault(_emberMetalIs_none); /** ## Overview This mixin provides properties and property observing functionality, core features of the Ember object model. Properties and observers allow one object to observe changes to a property on another object. This is one of the fundamental ways that models, controllers and views communicate with each other in an Ember application. Any object that has this mixin applied can be used in observer operations. That includes `Ember.Object` and most objects you will interact with as you write your Ember application. Note that you will not generally apply this mixin to classes yourself, but you will use the features provided by this module frequently, so it is important to understand how to use it. ## Using `get()` and `set()` Because of Ember's support for bindings and observers, you will always access properties using the get method, and set properties using the set method. This allows the observing objects to be notified and computed properties to be handled properly. More documentation about `get` and `set` are below. ## Observing Property Changes You typically observe property changes simply by adding the `observes` call to the end of your method declarations in classes that you write. For example: ```javascript Ember.Object.extend({ valueObserver: function() { // Executes whenever the "value" property changes }.observes('value') }); ``` Although this is the most common way to add an observer, this capability is actually built into the `Ember.Object` class on top of two methods defined in this mixin: `addObserver` and `removeObserver`. You can use these two methods to add and remove observers yourself if you need to do so at runtime. To add an observer for a property, call: ```javascript object.addObserver('propertyKey', targetObject, targetAction) ``` This will call the `targetAction` method on the `targetObject` whenever the value of the `propertyKey` changes. Note that if `propertyKey` is a computed property, the observer will be called when any of the property dependencies are changed, even if the resulting value of the computed property is unchanged. This is necessary because computed properties are not computed until `get` is called. @class Observable @namespace Ember @public */ exports['default'] = _emberMetalMixin.Mixin.create({ /** Retrieves the value of a property from the object. This method is usually similar to using `object[keyName]` or `object.keyName`, however it supports both computed properties and the unknownProperty handler. Because `get` unifies the syntax for accessing all these kinds of properties, it can make many refactorings easier, such as replacing a simple property with a computed property, or vice versa. ### Computed Properties Computed properties are methods defined with the `property` modifier declared at the end, such as: ```javascript fullName: function() { return this.get('firstName') + ' ' + this.get('lastName'); }.property('firstName', 'lastName') ``` When you call `get` on a computed property, the function will be called and the return value will be returned instead of the function itself. ### Unknown Properties Likewise, if you try to call `get` on a property whose value is `undefined`, the `unknownProperty()` method will be called on the object. If this method returns any value other than `undefined`, it will be returned instead. This allows you to implement "virtual" properties that are not defined upfront. @method get @param {String} keyName The property to retrieve @return {Object} The property value or undefined. @public */ get: function get(keyName) { return (0, _emberMetalProperty_get.get)(this, keyName); }, /** To get the values of multiple properties at once, call `getProperties` with a list of strings or an array: ```javascript record.getProperties('firstName', 'lastName', 'zipCode'); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } ``` is equivalent to: ```javascript record.getProperties(['firstName', 'lastName', 'zipCode']); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } ``` @method getProperties @param {String...|Array} list of keys to get @return {Object} @public */ getProperties: function getProperties() { for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) { args[_key] = arguments[_key]; } return _emberMetalGet_properties2['default'].apply(null, [this].concat(args)); }, /** Sets the provided key or path to the value. This method is generally very similar to calling `object[key] = value` or `object.key = value`, except that it provides support for computed properties, the `setUnknownProperty()` method and property observers. ### Computed Properties If you try to set a value on a key that has a computed property handler defined (see the `get()` method for an example), then `set()` will call that method, passing both the value and key instead of simply changing the value itself. This is useful for those times when you need to implement a property that is composed of one or more member properties. ### Unknown Properties If you try to set a value on a key that is undefined in the target object, then the `setUnknownProperty()` handler will be called instead. This gives you an opportunity to implement complex "virtual" properties that are not predefined on the object. If `setUnknownProperty()` returns undefined, then `set()` will simply set the value on the object. ### Property Observers In addition to changing the property, `set()` will also register a property change with the object. Unless you have placed this call inside of a `beginPropertyChanges()` and `endPropertyChanges(),` any "local" observers (i.e. observer methods declared on the same object), will be called immediately. Any "remote" observers (i.e. observer methods declared on another object) will be placed in a queue and called at a later time in a coalesced manner. @method set @param {String} keyName The property to set @param {Object} value The value to set or `null`. @return {Object} The passed value @public */ set: function set(keyName, value) { return (0, _emberMetalProperty_set.set)(this, keyName, value); }, /** Sets a list of properties at once. These properties are set inside a single `beginPropertyChanges` and `endPropertyChanges` batch, so observers will be buffered. ```javascript record.setProperties({ firstName: 'Charles', lastName: 'Jolley' }); ``` @method setProperties @param {Object} hash the hash of keys and values to set @return {Object} The passed in hash @public */ setProperties: function setProperties(hash) { return (0, _emberMetalSet_properties2['default'])(this, hash); }, /** Begins a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call this method at the beginning of the changes to begin deferring change notifications. When you are done making changes, call `endPropertyChanges()` to deliver the deferred change notifications and end deferring. @method beginPropertyChanges @return {Ember.Observable} @private */ beginPropertyChanges: function beginPropertyChanges() { (0, _emberMetalProperty_events.beginPropertyChanges)(); return this; }, /** Ends a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call `beginPropertyChanges()` at the beginning of the changes to defer change notifications. When you are done making changes, call this method to deliver the deferred change notifications and end deferring. @method endPropertyChanges @return {Ember.Observable} @private */ endPropertyChanges: function endPropertyChanges() { (0, _emberMetalProperty_events.endPropertyChanges)(); return this; }, /** Notify the observer system that a property is about to change. Sometimes you need to change a value directly or indirectly without actually calling `get()` or `set()` on it. In this case, you can use this method and `propertyDidChange()` instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call `propertyWillChange` and `propertyDidChange` as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like. @method propertyWillChange @param {String} keyName The property key that is about to change. @return {Ember.Observable} @private */ propertyWillChange: function propertyWillChange(keyName) { (0, _emberMetalProperty_events.propertyWillChange)(this, keyName); return this; }, /** Notify the observer system that a property has just changed. Sometimes you need to change a value directly or indirectly without actually calling `get()` or `set()` on it. In this case, you can use this method and `propertyWillChange()` instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call `propertyWillChange` and `propertyDidChange` as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like. @method propertyDidChange @param {String} keyName The property key that has just changed. @return {Ember.Observable} @private */ propertyDidChange: function propertyDidChange(keyName) { (0, _emberMetalProperty_events.propertyDidChange)(this, keyName); return this; }, /** Convenience method to call `propertyWillChange` and `propertyDidChange` in succession. @method notifyPropertyChange @param {String} keyName The property key to be notified about. @return {Ember.Observable} @private */ notifyPropertyChange: function notifyPropertyChange(keyName) { this.propertyWillChange(keyName); this.propertyDidChange(keyName); return this; }, addBeforeObserver: function addBeforeObserver(key, target, method) { _emberMetalCore2['default'].deprecate('Before observers are deprecated and will be removed in a future release. If you want to keep track of previous values you have to implement it yourself.', false, { url: 'http://emberjs.com/guides/deprecations/#toc_deprecate-beforeobservers' }); (0, _emberMetalObserver.addBeforeObserver)(this, key, target, method); }, /** Adds an observer on a property. This is the core method used to register an observer for a property. Once you call this method, any time the key's value is set, your observer will be notified. Note that the observers are triggered any time the value is set, regardless of whether it has actually changed. Your observer should be prepared to handle that. You can also pass an optional context parameter to this method. The context will be passed to your observer method whenever it is triggered. Note that if you add the same target/method pair on a key multiple times with different context parameters, your observer will only be called once with the last context you passed. ### Observer Methods Observer methods you pass should generally have the following signature if you do not pass a `context` parameter: ```javascript fooDidChange: function(sender, key, value, rev) { }; ``` The sender is the object that changed. The key is the property that changes. The value property is currently reserved and unused. The rev is the last property revision of the object when it changed, which you can use to detect if the key value has really changed or not. If you pass a `context` parameter, the context will be passed before the revision like so: ```javascript fooDidChange: function(sender, key, value, context, rev) { }; ``` Usually you will not need the value, context or revision parameters at the end. In this case, it is common to write observer methods that take only a sender and key value as parameters or, if you aren't interested in any of these values, to write an observer that has no parameters at all. @method addObserver @param {String} key The key to observer @param {Object} target The target object to invoke @param {String|Function} method The method to invoke. @public */ addObserver: function addObserver(key, target, method) { (0, _emberMetalObserver.addObserver)(this, key, target, method); }, /** Remove an observer you have previously registered on this object. Pass the same key, target, and method you passed to `addObserver()` and your target will no longer receive notifications. @method removeObserver @param {String} key The key to observer @param {Object} target The target object to invoke @param {String|Function} method The method to invoke. @public */ removeObserver: function removeObserver(key, target, method) { (0, _emberMetalObserver.removeObserver)(this, key, target, method); }, /** Returns `true` if the object currently has observers registered for a particular key. You can use this method to potentially defer performing an expensive action until someone begins observing a particular property on the object. @method hasObserverFor @param {String} key Key to check @return {Boolean} @private */ hasObserverFor: function hasObserverFor(key) { return (0, _emberMetalEvents.hasListeners)(this, key + ':change'); }, /** Retrieves the value of a property, or a default value in the case that the property returns `undefined`. ```javascript person.getWithDefault('lastName', 'Doe'); ``` @method getWithDefault @param {String} keyName The name of the property to retrieve @param {Object} defaultValue The value to return if the property value is undefined @return {Object} The property value or the defaultValue. @public */ getWithDefault: function getWithDefault(keyName, defaultValue) { return (0, _emberMetalProperty_get.getWithDefault)(this, keyName, defaultValue); }, /** Set the value of a property to the current value plus some amount. ```javascript person.incrementProperty('age'); team.incrementProperty('score', 2); ``` @method incrementProperty @param {String} keyName The name of the property to increment @param {Number} increment The amount to increment by. Defaults to 1 @return {Number} The new property value @public */ incrementProperty: function incrementProperty(keyName, increment) { if ((0, _emberMetalIs_none2['default'])(increment)) { increment = 1; } _emberMetalCore2['default'].assert('Must pass a numeric value to incrementProperty', !isNaN(parseFloat(increment)) && isFinite(increment)); return (0, _emberMetalProperty_set.set)(this, keyName, (parseFloat((0, _emberMetalProperty_get.get)(this, keyName)) || 0) + increment); }, /** Set the value of a property to the current value minus some amount. ```javascript player.decrementProperty('lives'); orc.decrementProperty('health', 5); ``` @method decrementProperty @param {String} keyName The name of the property to decrement @param {Number} decrement The amount to decrement by. Defaults to 1 @return {Number} The new property value @public */ decrementProperty: function decrementProperty(keyName, decrement) { if ((0, _emberMetalIs_none2['default'])(decrement)) { decrement = 1; } _emberMetalCore2['default'].assert('Must pass a numeric value to decrementProperty', !isNaN(parseFloat(decrement)) && isFinite(decrement)); return (0, _emberMetalProperty_set.set)(this, keyName, ((0, _emberMetalProperty_get.get)(this, keyName) || 0) - decrement); }, /** Set the value of a boolean property to the opposite of its current value. ```javascript starship.toggleProperty('warpDriveEngaged'); ``` @method toggleProperty @param {String} keyName The name of the property to toggle @return {Boolean} The new property value @public */ toggleProperty: function toggleProperty(keyName) { return (0, _emberMetalProperty_set.set)(this, keyName, !(0, _emberMetalProperty_get.get)(this, keyName)); }, /** Returns the cached value of a computed property, if it exists. This allows you to inspect the value of a computed property without accidentally invoking it if it is intended to be generated lazily. @method cacheFor @param {String} keyName @return {Object} The cached value of the computed property, if any @public */ cacheFor: function cacheFor(keyName) { return (0, _emberMetalComputed.cacheFor)(this, keyName); }, // intended for debugging purposes observersForKey: function observersForKey(keyName) { return (0, _emberMetalObserver.observersFor)(this, keyName); } }); module.exports = exports['default'];


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Copyright by
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{{< layout}} {{$pageTitle}}Applying as part of a family or couple{{/pageTitle}} {{$propositionHeader}}{{/propositionHeader}} {{$header}}
If you're applying as part of a family or couple, send all the documents together in the same envelope.
This helps to keep your applications together, which is important if you have to send the same document for more than one application.
Put all the documents together in a strong envelope. List each application reference number on the front, above the address.
If each person in the group has been given a different address, you can send the documents to any of the addresses we've given you.
Don't send the documents until their identity has been confirmed. You'll get an email when that's complete and we're ready to receive the documents.
{{> partials-elements-button-close}} {{/content}} {{/ layout}}


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When Should I File For Social Security Benefits? Claiming Is A Choice, Not A Necessity!
by Tom R. HagerThis might be the most asked question I receive. My typical response to this question is there are as many good reasons as bad reasons to file early, and, there are as many good reasons as bad reasons to file later. This article is written for single people who have never been married and married couples. Let me say at the beginning that there is no silver bullet answer to this question. Every situation is different. There are many variables.
You can literally leave as much as $200,000 on the table by not using the best claiming strategy.
If you are married, you need to consider this decision using your joint life expectancies. The question is not when should “I” file for benefits, but when should “We” file for benefits. The reason this is important is because the goal to planning your overall strategy should be to maximize the high earners benefit, coordinate the benefits between the spouses, and finally and perhaps most importantly is to maximize the survivor benefit. You can literally leave as much as $200,000 on the table by not using the best claiming strategy.
Life expectancies are increasing, and you need to think long term. Do not make this decision on an emotional basis. Many people make their claiming decision based on the premise that, I am going to take my benefits at 62 because I earned it and Social Security is going broke. For starters, Social Security is not going broke, so let’s take that off the table. Secondly, by understanding all of your claiming strategies, you are now able to make a cost/benefit analysis and have the peace of mind that you have made the right decision. You have once chance to get this decision correct. I would emphasize that this may be the most important financial decision you will make in retirement as it represents for most married couples a $1,500,000 annuity.
As always, the financial aspect of maximizing benefits is usually the primary driver. There are other variables to consider in an effort to maximize your lifetime benefits.
My advice to most single people who have never been married is pretty straight forward. Start benefits at your full retirement age (66 to 67) unless you need the cash flow now or you are in poor health. The advantage of delaying benefits is a key component to a married couple in order to maximize the survivor benefit. Since a single person who has never been married will not have a surviving spouse, it usually does not make sense to delay benefits past full retirement age. If you are currently single, and an ex-spouse, there is no advantage to claiming a spousal benefit past your own full retirement age.
Here are the issues you should consider when determining your optimum age to claim benefits:
Why Claim Benefits Early (Reduced)
- Poor health
- Limited earnings capacity
- You are the lower income spouse
- Mortality-short life expectancy. Do not expect to live to 80
- Cash Flow-need the cash
- Spouse and/or minor children who are entitled to benefits now but won’t be later. Children’s benefits stop at 19
- Your spouse will receive a higher benefit
- You have another government pension and want to file before other public pension begins-minimize the effect of the Windfall Elimination Provision or the Government Pension Offset
Why wait until Full Retirement Age 66 to 67
- Collect your full retirement benefits
- Annual Earnings Test goes away-can earn more than $17,640 without benefits being withheld
- Can take advantage of “restricted application” claiming option to maximize benefits if born before 1/2/1954.
- Can Voluntarily Suspend benefits
- Start to earn Delayed Retirement Credits
Why Claim Benefits Later (Increased)
- Cash flow from Social Security benefits are not as critical
- Plan on continuing to work
- Maximize survivor benefits
- Good/Excellent health-expect to live to at least 80
- Mitigate Longevity Risk
- Earn Delayed Retirement Credits-8% per year-up to a total of 32%
- You are the spouse with the higher income
- Retroactive benefits might be available
In any case, there is never a good reason to wait past 70 to file for benefits.
As a final comment, if you have determined that you made the wrong decision or for other reasons such as an inheritance or a new job, you didn’t know about when you made your initial claiming decision, you have 1 year to rescind that decision, and you can only do it once.
You can file a “Request for Withdrawal of Application” within one year of first claiming benefits on form SSA 521.
- Repay all benefits including spouse and children within the first 12 months of claiming
- Anyone who received benefits based on your application must consent in writing to the withdrawal and their benefits paid back.
- Medicare premiums or voluntary federal income tax withheld must also be repaid
Remember, dying is cheap, living is expensive. If you take the wrong benefit at the wrong time, it’s always smaller and it’s forever. Design your personal claiming strategy!


In scientific and engineering simulation projects the main goal is getting estimates of the values of certain variables or performance indicators with the help of statistical methods. In educational simulations, statistics can be used for observing simulation runs and for learning the dynamics of a simulation model.
For collecting statistics, suitable statistics variables have to be defined, as in the following example:
sim.model.setupStatistics = function () { sim.stat.arrivedCustomers = 0; sim.stat.departedCustomers = 0; sim.stat.maxQueueLength = 0; };
Statistics variables have to be updated in onEvent methods. For instance, the variables arrivedCustomers and maxQueueLength are updated in the onEvent method of the CustomerArrival event class:
class CustomerArrival extends eVENT { ... onEvent() { ... // update statistics sim.stat.arrivedCustomers++; if (this.serviceDesk.queueLength > sim.stat.maxQueueLength) { sim.stat.maxQueueLength = this.serviceDesk.queueLength; } ... } }
In certain cases, a statistics variable can only be computed at the end of a simulation run. For this purpose, there is the option to define a computeFinalStatistics procedure:
sim.model.computeFinalStatistics = function () { // percentage of business days without stock-outs sim.stat.serviceLevel = (sim.time - sim.stat.nmrOfStockOuts) / sim.time * 100; };
After running a simulation scenario, the statistics results are shown in a table:
| arrivedCustomers | 289 |
| departedCustomers | 288 |
| maxQueueLength | 4 |


PSALMS 89
A song written by Ethan, from the clan of Ezra
1 Yahweh, I will sing forever about the ways you faithfully love me;
people not yet born will hear that you faithfully do all that you have promised.
2 I will tell people that you will faithfully love us forever,
and that your being faithful to do what you have promised is as permanent as the sky.
3 Yahweh said, "I have made an agreement with David, whom I chose to serve me.
I have made this solemn agreement with him:
4 'I will enable various ones of your descendants to always be kings;
the line of kings descended from you will never end.'"
5 Yahweh, I desire that all those beings who are in heaven will praise you for the wonderful things that you do,
and that all your holy angels will sing about how you faithfully do what you promise.
6 There is no one in heaven who can be compared with you, Yahweh.

Mount Tabor and Mount Hermon joyfully praise you .
13 You are very powerful;
you are extremely strong.
14 You rule over people fairly and justly;
you are always faithfully loving us and doing what you promised.
15 Yahweh, how fortunate are those who worship you with joyful shouts in their festivals,
who live knowing that you are always watching over them.
16 Every day, throughout the day, they rejoice in what you have done,
and they praise you for being very good to them.
17 You give us your glorious strength;
because you act in our favor, we defeat our enemies.
18 Yahweh, you gave us the one who protects us;
you, the holy God whom we Israelites worship, chose a king for us.
19 Long ago you spoke in a vision to one of your servants, saying,
"I have crowned a famous soldier;
I chose him from among all the people to be a king.
20 That man is David, the one who will serve me faithfully,
and I anointed him with sacred olive oil to make him king.
21 My strength will always be with him;
with my power, I will make him strong.
22 His enemies will never find ways to outwit him,
and wicked people will never defeat him.
23 I will crush his enemies in front of him
and get rid of those who hate him.
24 I will always be loyal to him and faithfully love him
and enable him to defeat his enemies.
25 I will cause his kingdom to include all the land from the Mediterranean Sea to the Euphrates River.
26 He will say to me, 'You are my Father,
my God, the one who protects and saves me.'
27 I will give him the rights as my firstborn son;
he will be the greatest king on the earth.
28 I will always be loyal to him,
and my agreement to bless him will last forever.
29 I will establish a line of his descendants that will never end,
various ones of his descendants will always be kings.
30 But if some of his descendants disobey my laws
and do not behave as my commands say that they should,
31 if they disregard my requirements
and do not do the right things that I have told them to do,
32 I will punish them severely
and cause them to suffer for doing wrong.
33 But I will not stop faithfully loving David,
and I will always do what I promised him.
34 I will not break the agreement that I made with him;
I will not change even one word that I spoke to him.
35 Once I made a solemn promise to David, and that will never change;
because I am God, I will never lie to David.
36 I promised that the line of kings descended from him will go on forever;
it will last as long as the sun shines.
37 That line will be as permanent as the moon
that is always watching everything here on earth."
38 But Yahweh, now you have rejected him!
You are very angry with the king whom you appointed.
39 It seems that you have broken the agreement that you made with your servant, David;
it seems as though you have thrown his crown into the dust.
40 You have torn down the walls that protect his city
and allowed all his forts to become ruins.
41 All those who pass by plunder his possessions;
his neighbors laugh at him.
42 You have enabled his enemies to defeat him;
you have made them all happy.
43 You have caused his sword to become useless,
and you have not helped him in his battles.
44 You have caused his splendor to end
and knocked his throne to the ground.
45 You have caused him to become old when he is still young
and caused him to be very shamed.
46 O Yahweh, how long will this continue?
Will you hide yourself from us forever?
How long will your anger against us burn like a fire?
47 Do not forget that life is very short;
Do not forget that you have created all of us to die uselessly.
48 No one can keep on living and never die;
no one can bring himself back from the place of the dead.
49 Yahweh, you promised long ago
that you would faithfully love me;
why are you not doing that?
You solemnly promised this to David!
50 Yahweh, do not forget that people insult us!

They insult him wherever he goes.
52 I hope that Yahweh will be praised forever!
Amen! May it be so!


=== Test case: lasp_peer_to_peer_advertisement_counter_SUITE:peer_to_peer_state_based_tree_test/1 (click for source code)
=== Config value:
[{watchdog,<0.452.0>},
<EMAIL_ADDRESS>{tc_group_properties,[]},
{tc_group_path,[]},
{data_dir,"/Users/anne-francevanswieten/lasp/_build/test/lib/lasp/test/lasp_peer_to_peer_advertisement_counter_SUITE_data/"},
<EMAIL_ADDRESS>=== Current directory is<EMAIL_ADDRESS>=== Started at 2017-05-02 17:52:16
*** User 2017-05-02 17:52:16.345 ***
Beginning test case peer_to_peer_state_based_tree_test
*** User 2017-05-02 17:52:16.355 ***
Running peer_to_peer_ad_counter_state_based_tree_test with nodes [server,
client_1,
client_2,
client_3]
*** User 2017-05-02 17:52:16.355 ***
Launching Erlang distribution...

*** User 2017-05-02 17:52:22.515 ***
Custering nodes...
*** User 2017-05-02 17:52:22.515 ***
Joining node: 'server@MacBook-Pro-de-Anne-France' to 'client_1@MacBook-Pro-de-Anne-France' at port 58239
*** User 2017-05-02 17:52:22.516 ***
Joining node: 'server@MacBook-Pro-de-Anne-France' to 'client_2@MacBook-Pro-de-Anne-France' at port 58241
*** User 2017-05-02 17:52:22.519 ***
Joining node: 'server@MacBook-Pro-de-Anne-France' to 'client_3@MacBook-Pro-de-Anne-France' at port 58243
*** User 2017-05-02 17:52:22.521 ***
Joining node: 'client_1@MacBook-Pro-de-Anne-France' to 'server@MacBook-Pro-de-Anne-France' at port 58237
*** User 2017-05-02 17:52:22.523 ***
Joining node: 'client_1@MacBook-Pro-de-Anne-France' to 'client_2@MacBook-Pro-de-Anne-France' at port 58241
*** User 2017-05-02 17:52:22.526 ***
Joining node: 'client_1@MacBook-Pro-de-Anne-France' to 'client_3@MacBook-Pro-de-Anne-France' at port 58243
*** User 2017-05-02 17:52:22.528 ***
Joining node: 'client_2@MacBook-Pro-de-Anne-France' to 'server@MacBook-Pro-de-Anne-France' at port 58237
*** User 2017-05-02 17:52:22.533 ***
Joining node: 'client_2@MacBook-Pro-de-Anne-France' to 'client_1@MacBook-Pro-de-Anne-France' at port 58239
*** User 2017-05-02 17:52:22.535 ***
Joining node: 'client_2@MacBook-Pro-de-Anne-France' to 'client_3@MacBook-Pro-de-Anne-France' at port 58243
*** User 2017-05-02 17:52:22.536 ***
Joining node: 'client_3@MacBook-Pro-de-Anne-France' to 'server@MacBook-Pro-de-Anne-France' at port 58237
*** User 2017-05-02 17:52:22.539 ***
Joining node: 'client_3@MacBook-Pro-de-Anne-France' to 'client_1@MacBook-Pro-de-Anne-France' at port 58239
*** User 2017-05-02 17:52:22.540 ***
Joining node: 'client_3@MacBook-Pro-de-Anne-France' to 'client_2@MacBook-Pro-de-Anne-France' at port 58241
*** User 2017-05-02 17:52:22.540 ***
Lasp fully initialized.
*** User 2017-05-02 17:52:22.540 ***
Waiting for simulation to end
*** User 2017-05-02 18:09:58.957 ***
Simulation ended with success
*** User 2017-05-02 18:10:06.957 ***
Ending test case peer_to_peer_state_based_tree_test
=== Ended at 2017-05-02 18:10:06
=== successfully completed test case
=== Returned value: ok
Test run history
| Top level test index


Dr. Eleanor Gaye
Awesome Science faculty
University of Awesome
Bobtown, CA 99999,
USA Tel:<PHONE_NUMBER><EMAIL_ADDRESS>Eileen Dover
4321 Cliff Top Edge
Dover, CT9 XXX
UK
Re: Eileen Dover university application
Dear Eileen,
Thank you for your recent application to join us at the University of
Awesome's science faculty to study as part of your
PhD next year. I will
answer your questions one by one, in the following sections.
Starting dates
We are happy to accommodate you starting your study with us at any time,
however it would suit us better if you could start at the beginning of a
semester; the start dates for each one are as follows:
First semester:
Second semester:
Third semester:
Please let me know if this is ok, and if so which start date you would prefer.
You can find more information about important university dates on our
website.
Subjects of study
At the Awesome Science Faculty, we have a pretty open-minded research
facility — as long as the subjects fall somewhere in the realm of science
and technology.  Saying that, of the ideas
you submitted we were most intrigued by are as follows, in order of
priority:
Turning H2O into wine, and the health benefits of Resveratrol (C14H12O3.)
Measuring the effect on performance of funk bassplayers at temperatures
exceeding 30°C (86°F), when the audience size exponentially increases
(effect of 3 × 103 increasing to 3 × 104.)
HTML and CSS constructs for representing musical scores.
So please can you provide more information on each of these subjects,
including how long you'd expect the research to take, required staff and
other resources, and anything else you think we'd need to know? Thanks.
Exotic dance moves
Yes, you are right! As part of my post-doctorate work, I did study exotic
tribal dances. To answer your question, my favourite dances are as
follows, with definitions:
Polynesian chicken dance
A little known but very influential dance dating back as far as
300BC, a whole village would dance around in a circle like chickens, to
encourage their livestock to be "fruitful".
Icelandic brownian shuffle
Before the Icelanders developed fire as a means of getting warm,
they used to practice this dance, which involved huddling close together
in a circle on the floor, and shuffling their bodies around in
imperceptibly tiny, very rapid movements. One of my fellow students used
to say that he thought this dance inspired modern styles such as
Twerking.
Arctic robot dance
An interesting example of historic misinformation, English explorers in
the 1960s believed to have discovered a new dance style characterized by
"robotic", stilted movements, being practiced by inhabitants of Northern
Alaska and Canada. Later on however it was discovered that they were
just moving like this because they were really cold.


--- ---
Here is a message box that you can display from service applications. Change MB_OK to alter the buttons that appear. If you want the return value from MessageBoxEx change PopServiceBox into a function.
procedure PopServiceBox(Title, Text: string); begin MessageBoxEx( 0, PChar(Text), PChar(Title), MB_OK or MB_TOPMOST or MB_SERVICE_NOTIFICATION, 0 ); end;


|
Deprecated Methods |
com.essbase.api.metadata.IEssMember.addAliasCombination(String, String, String)
This function is deprecated in 7.1 version. |
com.essbase.api.session.IEssbase.changePassword(String)
This function has been deprecated. |
com.essbase.api.base.IEssExtendedObject.clearClientCache()
This functionality has been deprecated. |
com.essbase.api.datasource.IEssMaxlSession.close()
- Deprecated for lack of JAPI support |
com.essbase.api.domain.IEssEnterpriseServer.closeAllClustersAndConnectionPools()
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.connect(boolean)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.connect(boolean, boolean)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.connect(boolean, boolean, boolean, String)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssCube.IEssSecurityFilter.copy(String)
- use copyFilter(String) |
com.essbase.api.datasource.IEssCube.IEssSecurityFilter.copy(String, String, String)
- use copyFilter(String, String, String) |
com.essbase.api.datasource.IEssCube.createCDF(String, String, String, int, String, String)
This Method has been moved to IEssOlapServer and IEssOlapApplication . |
com.essbase.api.datasource.IEssCube.createCDM(String, String, String, String, String, String)
This Method has been moved to IEssOlapServer and IEssOlapApplication . |
com.essbase.api.domain.IEssDomain.createChildObject(String, IEssDomain.EEssDomainObjectType)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createConnectionPool(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createDomain(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createEnterpriseServer(String)
EDS/AHAS server does not exist from version 930. |
com.essbase.api.domain.IEssDomain.createGroup(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createRole(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createUser(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.createUser(String, String)
This functionality has been deprecated. |
com.essbase.api.metadata.IEssMember.deleteAliasCombination(String, String)
This function is deprecated in 7.1 version. |
com.essbase.api.datasource.IEssCube.deleteCDF(String, String)
This Method has been moved to IEssOlapServer and IEssOlapApplication . |
com.essbase.api.datasource.IEssCube.deleteCDM(String, String)
This Method has been moved to IEssOlapServer and IEssOlapApplication . |
com.essbase.api.domain.IEssDomain.deleteChildObject(String, IEssDomain.EEssDomainObjectType)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.deleteConnectionPool(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.deleteDomain(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.deleteEnterpriseServer(String)
EDS/AHAS server does not exist from version 930 |
com.essbase.api.domain.IEssDomain.deleteGroup(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.deleteRole(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.deleteUser(String)
This functionality has been deprecated. |
com.essbase.api.dataquery.IEssCubeView.emailOutput(String, String, String, String)
This feature is deprecated since Release 9.3.0 |
com.essbase.api.datasource.IEssMaxlSession.execute(String)
- Deprecated for lack of JAPI support |
com.essbase.api.datasource.IEssCube.exportData(String, IEssCube.EEssDataLevel, short)
Use the other exportData method. |
com.essbase.api.metadata.IEssMember.getAliasCombinations(String)
This function is deprecated in 7.1 version. |
com.essbase.api.datasource.IEssCube.getCDM_CDF(String)
This Method has been moved to IEssOlapServer and IEssOlapApplication . |
com.essbase.api.domain.IEssDomain.getChildObject(String, IEssDomain.EEssDomainObjectType)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getChildObjects(IEssDomain.EEssDomainObjectType)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getConnectionPool(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getConnectionPools()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getCountConnectionPools()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getCountDomains()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getCountEnterpriseServers()
EDS/AHAS server does not exist from version 930 |
com.essbase.api.domain.IEssDomain.getCountGroups()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getCountRoles()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getCountUsers()
This functionality has been deprecated. |
com.essbase.api.session.IEssbase.getCssToken()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getDomain(String)
This functionality has been deprecated. |
com.essbase.api.session.IEssbase.getDomainName()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getDomains()
This functionality has been deprecated. |
com.essbase.api.metadata.IEssMemberSelection.getDTSMemberAlias(String, String)
Essbase does not support this API in query mode |
com.essbase.api.domain.IEssEnterpriseServer.getEnabledConnectionPoolNames()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getEnterpriseServer(String)
EDS/AHAS server does not exist from version 930 |
com.essbase.api.domain.IEssDomain.getEnterpriseServers()
EDS/AHAS server does not exist from version 930 |
com.essbase.api.domain.IEssDomain.getExternalUsers(String, String, String, String)
This functionality has been deprecated. |
com.essbase.api.metadata.IEssMember.getFirstChildMemberName()
|
com.essbase.api.domain.IEssDomain.getGroup(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getGroups()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getHierarchicalName()
This functionality has been deprecated. |
com.essbase.api.metadata.IEssMember.getLastFormula()
Since <IP_ADDRESS>.00. |
com.essbase.api.metadata.IEssMember.getNextSiblingMemberName()
|
com.essbase.api.datasource.IEssCube.getOutline()
This method is replaced by openOutline() method. |
com.essbase.api.domain.IEssEnterpriseServer.getOutlineCacheMaxIdleTime()
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.getOutlineCacheSources()
This functionality has been deprecated. |
com.essbase.api.metadata.IEssMember.getPreviousSiblingMemberName()
|
com.essbase.api.datasource.IEssMaxlSession.getResultSet()
- Deprecated for lack of JAPI support |
com.essbase.api.domain.IEssDomain.getRole(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getRoles()
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.getStartCommand()
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.getStartCommand()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getUser(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.getUsers()
This functionality has been deprecated. |
com.essbase.api.base.IEssExtendedObject.isClientCachingEnabled()
This functionality has been deprecated. |
com.essbase.api.session.IEssbase.isDedicatedServerThreadNeeded()
This functionality has been deprecated. |
com.essbase.api.dataquery.IEssCubeView.isFormatMissing()
Replaced by IEssCubeView.isProcessMissing() |
com.essbase.api.session.IEssbase.isGlobalClientCachingEnabled()
This functionality has been deprecated. |
com.essbase.api.dataquery.IEssOpMdxQuery.isNeedFormattedMissingCells()
Replaced by IEssOpMdxQuery.isNeedProcessMissingCells() |
com.essbase.api.domain.IEssEnterpriseServer.isOutlineCacheEnabled()
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.openAllClustersAndConnectionPools()
This functionality has been deprecated. |
com.essbase.api.datasource.IEssCube.openCubeView(String, boolean, boolean, boolean, boolean)
Use the other openCubeView method. |
com.essbase.api.domain.IEssDomain.openCubeView(String, String, boolean)
Since <IP_ADDRESS>, Connection Pooling functionality not supported. |
com.essbase.api.domain.IEssDomain.openCubeView(String, String, String, String, boolean, boolean, boolean, boolean)
As of <IP_ADDRESS>, replaced by
IEssDomain.openCubeView(String, String, String, String) |
com.essbase.api.domain.IEssDomain.openMaxlSession(String, String)
- Deprecated for lack of JAPI support |
com.essbase.api.datasource.IEssCube.openMemberSelection(boolean, boolean, String, String)
This method is deprecated. This method will work in cluster
mode automatically based on whether the cube is connected to a cluster. |
com.essbase.api.datasource.IEssCube.openMemberSelection(String, boolean)
This method is deprecated. QueryOverCache feature is no longer
supported. |
com.essbase.api.session.IEssbase.restoreCssToken(String)
This functionality has been deprecated. |
com.essbase.api.base.IEssExtendedObject.setClientCachingEnabled(boolean)
This functionality has been deprecated. |
com.essbase.api.session.IEssbase.setDedicatedServerThreadNeeded(boolean)
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.setEnabledConnectionPoolNames(String)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssCube.IEssSecurityFilter.setFilterRow(String, IEssCube.EEssCubeAccess)
- The EEssCubeAccess does not cover the supported privileges |
com.essbase.api.dataquery.IEssCubeView.setFormatMissing(boolean)
Replaced by IEssCubeView.setProcessMissing(boolean) |
com.essbase.api.session.IEssbase.setGlobalClientCachingEnabled(boolean)
This functionality has been deprecated. |
com.essbase.api.dataquery.IEssOpMdxQuery.setNeedFormattedMissingCells(boolean)
Replaced by IEssOpMdxQuery.setNeedProcessMissingCells(boolean) |
com.essbase.api.domain.IEssEnterpriseServer.setOutlineCacheEnabled(boolean)
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.setOutlineCacheMaxIdleTime(int)
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.setOutlineCacheSources(String)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssMaxlSession.setResultSetFetchSize(int)
- Deprecated for lack of JAPI support |
com.essbase.api.datasource.IEssOlapServer.setStartCommand(String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.setStartCommand(String)
This functionality has been deprecated. |
com.essbase.api.session.IEssbase.signOn(String, String, String)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl) instead. |
com.essbase.api.session.IEssbase.signOn(String, String, String, IEssbase.EEssOrbPluginType, int)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl) instead. |
com.essbase.api.session.IEssbase.signOn(String, String, String, String)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl) instead. |
com.essbase.api.session.IEssbase.signOn(String, String, String, String, boolean)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl, java.lang.String olapServerName) instead. |
com.essbase.api.session.IEssbase.signOn(String, String, String, String, IEssbase.EEssOrbPluginType, int)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl) instead. |
com.essbase.api.session.IEssbase.signOn(String, String, String, String, String)
This function has been deprecated. The preferred method is
IEssbase.signOn(java.lang.String userName, java.lang.String password, boolean passwordIsToken,
java.lang.String userNameAs, java.lang.String providerUrl, java.lang.String olapServerName) instead. |
com.essbase.api.datasource.IEssOlapServer.start()
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.start()
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.start(String, String, String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.start(String, String, String)
This functionality has been deprecated. |
com.essbase.api.datasource.IEssOlapServer.stop()
This functionality has been deprecated. |
com.essbase.api.domain.IEssEnterpriseServer.stop()
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.syncSecurityStores(boolean, String, String)
This functionality has been deprecated. |
com.essbase.api.domain.IEssDomain.syncSecurityStores(boolean, String, String, String, String)
This functionality has been deprecated. |


The Arianee protocol is built both on Ethereum mainnet and a side-chain of Ethereum called POAnetwork. Building on both Mainnet and POA enables us to scale the protocol while still benefiting from Ethereum's Decentralized Finance infrastructure. In order to transfer tokens from one chain to the other, we built: the aria bridge
The flow chart below is a schematic representation of the tokenomics of the arianee protocol. To find out the current protocol rates and percentages, please refer to the technical documentation.
Ethereum is the most popular blockchain for Decentralized Finance (DeFi). DeFi is essential in our architecture because it enables the complete decentralization of the Arianee Protocol. This is why the Aria token was deployed on Ethereum as an ERC20. Thanks to this, the ARIA can be traded on decentralized exchanges such as Uniswap, Balancer, Sushiswap and many others under the ticker ARIA20.
aria.eth
ARIA20 Ethereum contract address:
0xeDF6568618A00C6F0908Bf7758A16F76B6E04aF9
POA is a fully-compatible Ethereum sidechain. It is a great solution to deploy smart contracts like the Arianee Protocol, which require low transaction costs and fast execution. ARIAs are necessary to access protocol features and for a certifier to claim its identity. Each aria spent in the protocol is then automatically redistributed between different stakholders according to an incentive manager: the Aria Store.
Technical Documentation
Complete documentation of the Arianee Protocol and its incentive mechanisms.
In order to transfer ARIAs from one chain to another, we built a bridge that locks ARIA20 on Ethereum Mainnet and mints ARIA on POA and vice versa.
The bridge can be accessed here.
70 million aria were allocated to token sales (private and public) to fund the early development of the projet.
40 million aria were allocated to the team and early advisors who helped the project.
10 million aria were allocated to Community incentives.
10 million aria were allocated to an Operational Reserve to run tests and to fund the liquidity pools.
70 million aria are kept in a long-term reserve.
Tokens allocated to the team, advisors and to the token pre-sale are released according to the lock-up schedule below.
Public Sale tokens are liquid upon listing on November 15th 2020.
Team and Private sales token are released on a 5 year schedule (starting January 1st 2021) with an annual cliff of 25%.
Advisor tokens are released on a 2 year schedule (starting January 1st 2021) with an annual cliff of 50%.


Easy Flow Charts
(BETA)
Site created and maintained by Tushar Joshi, Nagpur.
This site is under active development and not guaranteed to work correctly for every combination of the input.
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Although some people may think that the truth is subjective, when it comes to the subcontinent, one must act straightaway to ensure lasting peace and harmony. [G|D]
To succeed in life, one must not succumb to subjugation, but instead subscribe to the pursuit of knowledge and hard work. [G|D]
To surceasesuffering and improve air quality, sulfate emissions must be drastically reduced on a global scale. [G|D]
Rather than engaging in tautology and believing the inaccurate claims of tabloids, we should strive to stay on course and avoid going off on a tangent. [G|D]


{% extends 'global/base.html' %} {% load staticfiles rev %} {% block content %}
Django Girls events are organized by groups of wonderful volunteers in cities all over the world. Events are always non-profit and free for participants. We DO NOT PAY coaches, speakers or organizers. Attendees don’t need any previous knowledge about programming and there are no age limitations. All attendees need is a laptop and some curiosity!
As of 2020, Django Girls workshops can only be held remotely. This is due to the ongoing Global Pandemic, and allows workshops continue while ensuring the safety of our organisers, volunteers and participants. We will review this decision in 2021, and hope to also allow for in-person workshops as soon as it is safe to do so.
An in-person workshop is any workshop where participants, coaches, and organisers, all meet in the same physical location. Participants can work together in teams and support from coaches is done face-to-face.
These workshops should only be conducted when it is safe to do so, and you may be asked in your application to provide evidence of why you feel this type of worshops is safe, and what, if any, safety measures you will be putting in place.
If you are not sure if it is safe to hold an in-person workshop, you might prefer to organise a remote workshop instead.
A remote workshop is a workshop conducted online, where participants, coaches and organisers are in different physical locations.
This type of workshop may be more suitable in situations where it might not be safe, affordable, or logistically possible to host a workshop in-person, or where difficulties finding sponsorship would be a barrier to running to the workshop in-person. Remote workshops also allow for more flexibility with the location of your attendees and coaches.
Since July 2014, {{ organizers_count }} volunteers organized {{ past_events_count }} Django Girls workshops. Join them and bring Django Girls to your city!
Django Girls helped me gain more self-confidence and gave me a boost to keep learning. I’ve created my own blog and then prepared workshops and taught other women to code. Nothing is impossible with this bunch of positive people!— Agata Grdal, organizer of Django Girls Wrocław
Organizers of Django Girls Windhoek, Namibia share their experience of organizing an event in Africa. Read more »
A Toolkit of Awesome: tips & tricks from seasoned Django Girls organizers in Budapest, Hungary. Read more »
Learn how Django Girls Seoul built a local tech community using events as their main tool. Read more »


Methods
Methods are functions that are associated with a particular type. Classes, structures, and enumerations can all define instance methods, which encapsulate specific tasks and functionality for working with an instance of a given type. Classes, structures, and enumerations can also define type methods, which are associated with the type itself. Type methods are similar to class methods in Objective-C.
The fact that structures and enumerations can define methods in Swift is a major difference from C and Objective-C. In Objective-C, classes are the only types that can define methods. In Swift, you can choose whether to define a class, structure, or enumeration, and still have the flexibility to define methods on the type you create.
Instance Methods
Instance methods are functions that belong to instances of a particular class, structure, or enumeration. They support the functionality of those instances, either by providing ways to access and modify instance properties, or by providing functionality related to the instance’s purpose. Instance methods have exactly the same syntax as functions, as described in Functions.
You write an instance method within the opening and closing braces of the type it belongs to. An instance method has implicit access to all other instance methods and properties of that type. An instance method can be called only on a specific instance of the type it belongs to. It cannot be called in isolation without an existing instance.
Here’s an example that defines a simple Counter
class, which can be used to count the number of times an action occurs:
class Counter {
var count = 0
func increment() {
count += 1
}
func increment(by amount: Int) {
count += amount
}
func reset() {
count = 0
}
}
The Counter
class defines three instance methods:
increment()
increments the counter by1
.increment(by: Int)
increments the counter by a specified integer amount.reset()
resets the counter to zero.
The Counter
class also declares a variable property, count
, to keep track of the current counter value.
You call instance methods with the same dot syntax as properties:
let counter = Counter()
// the initial counter value is 0
counter.increment()
// the counter's value is now 1
counter.increment(by: 5)
// the counter's value is now 6
counter.reset()
// the counter's value is now 0
Function parameters can have both a name (for use within the function’s body) and an argument label (for use when calling the function), as described in Function Argument Labels and Parameter Names. The same is true for method parameters, because methods are just functions that are associated with a type.
The self Property
Every instance of a type has an implicit property called self
, which is exactly equivalent to the instance itself. You use the self
property to refer to the current instance within its own instance methods.
The increment()
method in the example above could have been written like this:
func increment() {
self.count += 1
}
In practice, you don’t need to write self
in your code very often. If you don’t explicitly write self
, Swift assumes that you are referring to a property or method of the current instance whenever you use a known property or method name within a method. This assumption is demonstrated by the use of count
(rather than self.count
) inside the three instance methods for Counter
.
The main exception to this rule occurs when a parameter name for an instance method has the same name as a property of that instance. In this situation, the parameter name takes precedence, and it becomes necessary to refer to the property in a more qualified way. You use the self
property to distinguish between the parameter name and the property name.
Here, self
disambiguates between a method parameter called x
and an instance property that is also called x
:
struct Point {
var x = 0.0, y = 0.0
func isToTheRightOf(x: Double) -> Bool {
return self.x > x
}
}
let somePoint = Point(x: 4.0, y: 5.0)
if somePoint.isToTheRightOf(x: 1.0) {
print("This point is to the right of the line where x == 1.0")
}
// Prints "This point is to the right of the line where x == 1.0"
Without the self
prefix, Swift would assume that both uses of x
referred to the method parameter called x
.
Modifying Value Types from Within Instance Methods
Structures and enumerations are value types. By default, the properties of a value type cannot be modified from within its instance methods.
However, if you need to modify the properties of your structure or enumeration within a particular method, you can opt in to mutating behavior for that method. The method can then mutate (that is, change) its properties from within the method, and any changes that it makes are written back to the original structure when the method ends. The method can also assign a completely new instance to its implicit self
property, and this new instance will replace the existing one when the method ends.
You can opt in to this behavior by placing the mutating
keyword before the func
keyword for that method:
struct Point {
var x = 0.0, y = 0.0
mutating func moveBy(x deltaX: Double, y deltaY: Double) {
x += deltaX
y += deltaY
}
}
var somePoint = Point(x: 1.0, y: 1.0)
somePoint.moveBy(x: 2.0, y: 3.0)
print("The point is now at (\(somePoint.x), \(somePoint.y))")
// Prints "The point is now at (3.0, 4.0)"
The Point
structure above defines a mutating moveBy(x:y:)
method, which moves a Point
instance by a certain amount. Instead of returning a new point, this method actually modifies the point on which it is called. The mutating
keyword is added to its definition to enable it to modify its properties.
Note that you cannot call a mutating method on a constant of structure type, because its properties cannot be changed, even if they are variable properties, as described in Stored Properties of Constant Structure Instances:
let fixedPoint = Point(x: 3.0, y: 3.0)
fixedPoint.moveBy(x: 2.0, y: 3.0)
// this will report an error
Assigning to self Within a Mutating Method
Mutating methods can assign an entirely new instance to the implicit self
property. The Point
example shown above could have been written in the following way instead:
struct Point {
var x = 0.0, y = 0.0
mutating func moveBy(x deltaX: Double, y deltaY: Double) {
self = Point(x: x + deltaX, y: y + deltaY)
}
}
This version of the mutating moveBy(x:y:)
method creates a brand new structure whose x
and y
values are set to the target location. The end result of calling this alternative version of the method will be exactly the same as for calling the earlier version.
Mutating methods for enumerations can set the implicit self
parameter to be a different case from the same enumeration:
enum TriStateSwitch {
case off, low, high
mutating func next() {
switch self {
case .off:
self = .low
case .low:
self = .high
case .high:
self = .off
}
}
}
var ovenLight = TriStateSwitch.low
ovenLight.next()
// ovenLight is now equal to .high
ovenLight.next()
// ovenLight is now equal to .off
This example defines an enumeration for a three-state switch. The switch cycles between three different power states (off
, low
and high
) every time its next()
method is called.
Type Methods
Instance methods, as described above, are methods that are called on an instance of a particular type. You can also define methods that are called on the type itself. These kinds of methods are called type methods. You indicate type methods by writing the static
keyword before the method’s func
keyword. Classes may also use the class
keyword to allow subclasses to override the superclass’s implementation of that method.
Type methods are called with dot syntax, like instance methods. However, you call type methods on the type, not on an instance of that type. Here’s how you call a type method on a class called SomeClass
:
class SomeClass {
class func someTypeMethod() {
// type method implementation goes here
}
}
SomeClass.someTypeMethod()
Within the body of a type method, the implicit self
property refers to the type itself, rather than an instance of that type. This means that you can use self
to disambiguate between type properties and type method parameters, just as you do for instance properties and instance method parameters.
More generally, any unqualified method and property names that you use within the body of a type method will refer to other type-level methods and properties. A type method can call another type method with the other method’s name, without needing to prefix it with the type name. Similarly, type methods on structures and enumerations can access type properties by using the type property’s name without a type name prefix.
The example below defines a structure called LevelTracker
, which tracks a player’s progress through the different levels or stages of a game. It is a single-player game, but can store information for multiple players on a single device.
All of the game’s levels (apart from level one) are locked when the game is first played. Every time a player finishes a level, that level is unlocked for all players on the device. The LevelTracker
structure uses type properties and methods to keep track of which levels of the game have been unlocked. It also tracks the current level for an individual player.
struct LevelTracker {
static var highestUnlockedLevel = 1
var currentLevel = 1
static func unlock(_ level: Int) {
if level > highestUnlockedLevel { highestUnlockedLevel = level }
}
static func isUnlocked(_ level: Int) -> Bool {
return level <= highestUnlockedLevel
}
@discardableResult
mutating func advance(to level: Int) -> Bool {
if LevelTracker.isUnlocked(level) {
currentLevel = level
return true
} else {
return false
}
}
}
The LevelTracker
structure keeps track of the highest level that any player has unlocked. This value is stored in a type property called highestUnlockedLevel
.
LevelTracker
also defines two type functions to work with the highestUnlockedLevel
property. The first is a type function called unlock(_:)
, which updates the value of highestUnlockedLevel
whenever a new level is unlocked. The second is a convenience type function called isUnlocked(_:)
, which returns true
if a particular level number is already unlocked. (Note that these type methods can access the highestUnlockedLevel
type property without your needing to write it as LevelTracker.highestUnlockedLevel
.)
In addition to its type property and type methods, LevelTracker
tracks an individual player’s progress through the game. It uses an instance property called currentLevel
to track the level that a player is currently playing.
To help manage the currentLevel
property, LevelTracker
defines an instance method called advance(to:)
. Before updating currentLevel
, this method checks whether the requested new level is already unlocked. The advance(to:)
method returns a Boolean value to indicate whether or not it was actually able to set currentLevel
. Because it’s not necessarily a mistake for code that calls the advance(to:)
method to ignore the return value, this function is marked with the @discardableResult
attribute. For more information about this attribute, see Attributes.
The LevelTracker
structure is used with the Player
class, shown below, to track and update the progress of an individual player:
class Player {
var tracker = LevelTracker()
let playerName: String
func complete(level: Int) {
LevelTracker.unlock(level + 1)
tracker.advance(to: level + 1)
}
init(name: String) {
playerName = name
}
}
The Player
class creates a new instance of LevelTracker
to track that player’s progress. It also provides a method called complete(level:)
, which is called whenever a player completes a particular level. This method unlocks the next level for all players and updates the player’s progress to move them to the next level. (The Boolean return value of advance(to:)
is ignored, because the level is known to have been unlocked by the call to LevelTracker.unlock(_:)
on the previous line.)
You can create an instance of the Player
class for a new player, and see what happens when the player completes level one:
var player = Player(name: "Argyrios")
player.complete(level: 1)
print("highest unlocked level is now \(LevelTracker.highestUnlockedLevel)")
// Prints "highest unlocked level is now 2"
If you create a second player, whom you try to move to a level that is not yet unlocked by any player in the game, the attempt to set the player’s current level fails:
player = Player(name: "Beto")
if player.tracker.advance(to: 6) {
print("player is now on level 6")
} else {
print("level 6 has not yet been unlocked")
}
// Prints "level 6 has not yet been unlocked"
Copyright © 2017 Apple Inc. All rights reserved. Terms of Use | Privacy Policy | Updated: 2017-09-19


This is the browser demo where the EventReduce algorithm is used in different browser databases so you can test out the performance gains of different queries.
This will run 100 random events and after each event it will query the database for the new results
This will run 100 random events and after each event it will use EventReduce to calculate the new results