Stripe Terminal iOS SDK
For information on migrating from beta versions of the iOS SDK, see the Stripe Terminal Beta Migration Guide.
Requirements
The Stripe Terminal iOS SDK is compatible with apps supporting iOS 9 and above.
Try the example app
The iOS SDK includes an open-source example app, which you can use to familiarize yourself with the SDK and reader before starting your own integration.
To build the example app from source, you’ll need to:
- Navigate to the
Example
folder, and openExample.xcodeproj
. - Navigate to our example backend and click the button to deploy it on Heroku.
- In
AppDelegate.swift
, set the URL of the Heroku app you just deployed. - Build and run the app. The SDK comes with a simple reader simulator, so you can get started without any physical hardware.
Note: the example app comes with the Stripe Terminal SDK pre-installed, but uses a few other dependencies. We’ve included pre-built dependencies using Swift 4.2. You may need to run ./setup.sh
to re-build the app’s dependencies for your environment.
For a more fully-featured example, see our Stripe Sample with Terminal on iOS: the Rocket Rides Pilot App.
Installation
We recommend that you install the SDK using CocoaPods. If you prefer to install the library manually, please use the latest version from our releases page.
CocoaPods
If you haven’t already, install the latest version of CocoaPods.
Add this line to your Podfile:
pod 'StripeTerminal', '~> 1.0'
Run the following command:
pod install
From now on, don’t forget to use the *.xcworkspace
file to open your project in Xcode, instead of the .xcodeproj
file.
In the future, to update to the latest compatible version of the SDK, just run:
pod update StripeTerminal
Manual
Navigate to our releases page, download StripeTerminal.framework.zip, and unzip it.
Drag
StripeTerminal.framework
to the Embedded Binaries section of your Xcode project’s General settings. Make sure to select “Copy items if needed”.Navigate to the Build Phases section of your Xcode project settings, and create a new Run Script Build Phase. Paste the following snippet into the text field:
bash "${BUILT_PRODUCTS_DIR}/${FRAMEWORKS_FOLDER_PATH}/StripeTerminal.framework/integrate-framework.sh"
When new versions of the SDK are released, repeat steps one and two to update your installation.
Configure your app
Location services must be enabled in order to use the iOS SDK. Add the following key-value pair to your app’s Info.plist
file:
- Privacy - Location When In Use Usage Description
- Key:
NSLocationWhenInUseUsageDescription
- Value: “Location access is required in order to accept payments.”
- Key:
Note: Stripe needs to know where payments occur to reduce risks associated with those charges and to minimize disputes. If the SDK can’t determine the iOS device’s location, payments are disabled until location access is restored.
For your app to run in the background and remain connected to the reader, add this key-value pair to your Info.plist
file:
- Required background modes
- Key:
UIBackgroundModes
- Value:
bluetooth-central
(Uses Bluetooth LE accessories)
Note
Note the value is actually an array that you will need to addbluetooth-central
to. - Key:
For your app to pass validation when submitting to the App Store, add the following key-value pairs as well:
- Privacy - Bluetooth Peripheral Usage Description
- Key:
NSBluetoothPeripheralUsageDescription
- Value: “Bluetooth access is required in order to connect to supported bluetooth card readers.”
- Key:
- Privacy - Bluetooth Always Usage Description
- Key:
NSBluetoothAlwaysUsageDescription
- Value: “This app uses Bluetooth to connect to supported card readers.”
- Key:
Documentation
Verifone P400 support in the iOS SDK
iOS connectivity to the Verifone P400 reader is currently in public beta. Not all capabilities of the iOS SDK are available when connected to the Verifone P400, and some features available in the JavaScript SDK are not available in the iOS SDK. As the beta progresses, we aim to add these capabilities to the iOS SDK.
Notably, the following iOS methods are not available when connected to the Verifone P400:


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How to Sleep with a New Tattoo
by wikiHow Staff ✅You've researched a tattoo, found an artist, gone under the needle, and now it's time to rest. If you got a tattoo on your back, chest, or side, you'll need to protect the tattoo while you sleep. This means putting clean sheets on the bed, letting air circulate around the tattoo, and changing your sleep position. Fortunately, your tattoo will heal quickly if you get lots of quality rest and you'll soon be sleeping like normal.
Explore this Article
■ Protecting the Tattoo
■ Making Yourself Comfortable
Related Articles
Method 1 - Protecting the Tattoo
1. Put fresh sheets on your bed before you go to sleep. Old sheets contain dead skin cells and bacteria that could cause infection, especially when you stop covering your tattoo. Change your bedding before sleeping with your new tattoo.[1]
- If you have enough sheets, put clean sheets on the bed every night.
Tip: Use dark bedding instead of light-colored sheets since ink from your tattoo might stain the sheets.
2. Follow your tattoo artist's care recommendations about wrapping. Ask your tattoo artist if you need to keep the tattoo covered while you sleep and when you should remove the wrapping. They might advise you to keep their bandage on for the first night before removing it. To put a new bandage on at home, you may be told to put a sterile absorbent bandage on the tattoo.[2]
- If the bandage doesn't have adhesive, use medical tape to secure the bandage around the tattoo. Ensure that you don't apply tape to the tattoo, which would be painful to remove.
- Avoid wrapping the tattoo with plastic clingfilm because it traps sweat and bacteria against the tattoo.
3. Choose a sleeping position that keeps you off of the tattoo. Your tattoo needs circulating air in order to heal faster. If you lie on the tattoo, you'll irritate the skin and trap moisture against it as you sleep. If you got a tattoo on your:[3]
- Back, sleep on your belly.
- Side, lie on your opposite side.
- Chest, sleep on your back.
- Leg, raise your leg with a pillow or cushion.
4. Wait 4 to 7 days before you sleep on your tattoo. Your tattoo will ooze and bleed for a few days after you get it. Avoid sleeping on the tattoo at this point since it needs air circulation. Once the new layer of skin has formed over your tattoo, usually after 4 to 7 days, you can begin to sleep on it.[4]
- You'll also see the old skin scab and flake off, which can make the tattoo feel itchy.
5. Try to get at least 8 hours of sleep.  This gives your body more time to recover and helps your tattoo heal faster.[5]
- Remember that your immune system is responding to the tattoo, so support it by eating nutritious foods as well.
6. Wet any bedding that sticks to your tattoo during the night. If you wake up and see that your top bedsheet is sticking to your tattoo, do not pull it off, which could slow the healing process. Instead, hold the sheet and carefully walk to a sink. Get the sheet wet to loosen it and then remove the sheet.[6]
- To prevent the bottom fitted sheet from sticking to your tattoo, lay a clean towel or cloth under you before you go to sleep. Then, replace the towel or sheet if it sticks to you during the night.
- If the sheet is stuck to a tattoo that's in a hard to reach place, such as on your back, get in the shower with the sheet stuck to you.
Method 2 - Making Yourself Comfortable
1. Wear loose clothing that doesn't rub against the tattoo. Your tattoo site is extra sensitive and might still be painful, which can make it difficult to sleep. Prevent scratchy fabric from pressing hard against the tattoo and wear loose, soft clothing to bed instead.[7]
- If you prefer, don't wear pajamas if they cover your tattoo.
2. Arrange pillows under your knees to make sleeping on your back more comfortable. You're more likely to stay off of your tattoo if you have pillows or cushions that support you as you sleep. If your tattoo is on your chest and you're trying to sleep on your back, put small pillows or rolled-up towels under each of your knees.[8]
- Add extra pillows under your head if you feel like you're leaning too far back on the bed.
- Raising your knees with the pillows supports your lower back so it's more comfortable.
3. Put a pillow under your chest if you need to sleep on your belly. If your tattoo is on your back and you find that laying on your belly and chest is uncomfortable, slide a pillow under your chest. The pillow raises you up a little so you're not putting as much pressure on your chest.[9]
-  Place pillows in front and behind you if you're sleeping on your side. If you got a tattoo on 1 of your sides, lie on your opposite side. To prevent you from rolling over onto your other side, arrange a long pillow, bolster, or sleeping wedge near your chest. Put another 1 right behind you along your back.[10]
- If it's difficult for you to position the pillows, ask a friend to help.
5. Sleep alone for the first few nights after getting the tattoo. If you share your bed with a partner, ask them to sleep in another room so you can get good sleep. This is especially important if your partner is a restless sleeper or you're getting used to different sleep positions.[11]
- You might find that your support pillows take up a lot of space and there isn't as much room for your partner.
- If you have pets that get into bed with you, try to keep them out of your bed for the first few days after getting your tattoo. This will prevent animal dander and germs from getting into your new tattoo.
6.  To help you fall asleep easier, avoid bright light from televisions, phones, or computer screens in the hour before you go to bed. Instead, do a relaxing activity, such as reading, yoga, or talking with a friend.[12]
Tip: Consider cutting back on caffeine during the day so you have an easier time drifting off to sleep.
Tips
- If you're traveling or staying in a hotel after getting the tattoo, bring your own clean bedding instead of relying on the hotel's cleanliness.
Things You'll Need
- Clean bedsheets
- Clean towel or cloth
- Pillows, cushions, or rolled-up towels
Related wikiHows
References
-
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://www.tattoodo.com/a/dos-donts-an-official-guide-in-healing-your-new-tattoo-4647 -
↑ https://www.tattoodo.com/a/dos-donts-an-official-guide-in-healing-your-new-tattoo-4647 -
↑ https://flo.health/menstrual-cycle/lifestyle/hygiene-and-beauty/how-long-does-it-take-for-a-tattoo-to-heal -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://www.tattoodo.com/a/dos-donts-an-official-guide-in-healing-your-new-tattoo-4647 -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://tiptopsleep.com/sleeping-with-a-new-tattoo/ -
↑ https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Understanding-Sleep


New r/paydaybuilds skill builder
Remaining skill points:
LEFT
CENTER
RIGHT
CREW CHIEF
MUSCLE
ARMORER
ROGUE
HITMAN
CROOK
BURGLAR
INFILTRATOR
SOCIOPATH
GAMBLER
GRINDER
YAKUZA
EX-PRESIDENT
MANIAC
ANARCHIST
BIKER
KINGPIN
SICARIO
STOIC
TAG TEAM
HACKER
Share your Build with anyone!
Credits
This site was made possible by the combined effort of r/paydaybuilds community.
Contributors of this project can be found here.
This software is provided under the MIT license. Do what you want with it, but please respect its open-source nature.


--- layout: page title: About header-img: "img/about-bg.png" ---
Software Engineering Student, Self-Proclaimed Soccer Expert, Amateur Stand-Up Comedian, Guy just trying to live his best life!


Jeremy Corbyn accused of anti-Semitism for pronunciation of Epstein's name
Jeremy Corbyn has been accused of mis-pronouncing Jeffrey Epstein’s name to make him ‘sound more Jewish’ amid accusations of anti-Semitism against him and the Labour party.
During the ITV leaders debate last night both he and Boris Johnson were asked whether Prince Andrew is ‘fit for purpose’ after his ‘car crash’ interview over his relationship with the billionaire sex offender.
The Labour leader – who has come under fire for his handling of the anti-Semitism allegations against him – said Epstein’s name with the sounding ‘Epshtine’ rather than ‘Epsteen’, with many viewers picking up on it online.
Comedian David Baddiel said ‘every Jew noticed’ while quoting a tweet that said the Labour leader’s pronunciation made the paedophile ‘sound more Jewish’.
He said: ‘I think it was a subconscious thing and meaning is up for discussion.
‘But as one who DM’d last night said; it’s a thing that feels visceral to Jews but oblique to the outside world.’
He later added that he did not think Mr Corbyn deliberately made the ‘Epshtein’ pronunciation, adding: ‘I think that moment was subconscious: which perhaps says more.’
Advertisement Advertisement
During the debate Mr Corbyn said: ‘Before we discuss Prince Andrew I think we should discuss the victims that were there because of what Epstein was doing.
‘I think there are very, very serious questions that must be answered and nobody should be above the law.
‘But the primary position ought to be the proper treatment of those people who were the victims of the most appalling behaviour by apparently Epstein and many others.’
Mr Baddiel wasn’t alone in condemning the pronunciation, with many taking to Twitter to call it out as anti-Semitic.

Mr Corbyn said anti-Semitism was ‘an absolute evil and scourge within our society’ and insisted the party treated the issue ‘very, very seriously’.
ITV host Julie Etchingham received a round of applause when she asked Mr Corbyn about a poll showing many Jewish people do not trust him over anti-Semitism.
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The Labour leader replied: ‘I have taken action in my party, where anyone who has committed any anti-Semitic acts or made any anti-Semitic statements, they are either suspended or expelled from the party and we’ve investigated every single case.
‘We do take this very seriously indeed.’
But Karen Pollock, CEO of the Holocaust Educational Trust, tweeted that Mr Corbyn’s claims were ‘blatantly untrue’.
Got a story for Metro.co.uk?
Get in touch with our news team by emailing us at<EMAIL_ADDRESS>For more stories like this, check our news page.


My favourite things
Below are my best friends
George
Kimosop
Robert
Naomi
Wageci
Naisenya
Michael
Margaret
David
My favourite Food
I like chips masala,fillet with a orange juice


This module is primarily concerned with understanding how payday loans work. On the surface, payday loans may seem like a pretty good deal - but when carefully compared with other types of loans, we'll see that they can actually end up costing the borrower a lot of money. We'll look at how they compare to other types of loans that are available to people with better credit scores
in-context


--- layout: post mathjax: true comments: true date: 2012-12-15 title: [Project Euler] #67 Solution excerpt: | This page presents a Ruby solution to Project Euler Problem 67. tags: - project euler problem 67 solution - project euler problem 67 answer - project euler problem 67 ruby ---
By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bottom is 23.
3
7 4
2 4 6
8 5 9 3
That is, \(3 + 7 + 4 + 9 = 23\).
Find the maximum total from top to bottom in triangle.txt (right click and 'Save Link/Target As...'), a 15K text file containing a triangle with one-hundred rows.
NOTE: This is a much more difficult version of Problem 18. It is not possible to try every route to solve this problem, as there are 299 altogether! If you could check one trillion (\(10^12\)) routes every second it would take over twenty billion years to check them all. There is an efficient algorithm to solve it. ;o)
7273


--- author: Shazron categories: app date: '2010-11-06 01:56:26' link: http://blogs.nitobi.com/shazron/2010/11/06/ios-keychain-plugin-for-phonegap/ permalink: /2010/11/06/ios-keychain-plugin-for-phonegap/ slug: ios-keychain-plugin-for-phonegap status: publish title: iOS Keychain Plugin for PhoneGap type: post format: html ---
So what is the Keychain? It's a framework to store data (particularly passwords) securely on Mac OS X and iOS. You really don't want to store passwords and other sensitive information in HTML5 local or web storage. This is a PhoneGap plugin for iOS that provides access to the Keychain through Javascript. Based on Buzz Andersen's work - namely SFHFKeychainUtils
View the README and check out the sample app's index.html for usage. Play around with the Get, Set, and Remove examples, should be self-explanatory.


Auto scale
Description
Demo
Example of transforming with respect to the parent element:
This is how it should look originally
This is how it looks after scaling
This is a narrow scaled to the body width
Documentation
Global navigation


Is traveling and discovering new places and people your
passion?
Do you want to feed that passion without burning
through your pocket?
As a group of students, this is the situation we found ourselves in: eager to go on trips, but with the need to balance our trips and spending.
With that in mind, we built this application that lets you visualize and easily decide which city to visit in France, based on the budget you want.
On the map, you can see all the stops near important cities as blue markers. If you zoom in, you can also see other, less important stops. Important cities are simply historic cities (cities with historical monuments) or cities that are classified by France as Villes d'Art et d'Histoire
You can select your budget for the trip by using the scroller on the top left corner and the starting station by filling the text box right above it. You can also select a starting station from the map, by clicking on a city's marker then pressing the "Set as starting location" button.
By selecting the starting station, you should see all the possible routes you can take with the chosen budget. The colors used for the edges reflect the price of the trip to a linked station. The closer the color to red, the closer it is to your limit budget. Similarily, the closer it is to green the cheaper the trip price is. Note that you can always check the legend next to the scroller.
Clicking on a stop will show some additional information on a sidebar to the left, such as interesting cities that can be accessed once you're at selected stop.
There, you can click on a nearby city's name in that list to show a short summary about the city, as well as a list of monuments you can visit there.
An alternate view is also offered to view detailed routes info: the right sidebar will show you a sorted list, and you can expand a specific route you're interested in to view the exact stops and durations/price breakdown. Additionally, hovering your mouse on one of the items will preview that path on the map (and in reverse, clicking on a path on the map will open that item's details view in the right sidebar).
That's it for the usage instructions! We tried to make the tool as friendly and useful as possible. You can find the interactive tool just below, so please feel free to take it for a spin. We hope you enjoy it and find it useful!
We unfortunately couldn't resolve some issues with
the datasets we're using (obtained from
SNCF).
This is mostly due to (1) incomplete or outdated data
offered by SNCF; (2) severe inconsistencies between the
data sources.
We also had to use the full prices for the tickets, as that
was the only consistent data point we could access.
You might notice that your favorite metro stop is missing,
or that some routing paths are not present when they should
be.
We did our best to fix as many of these issues as
possible, and hope you'll enjoy interacting with our tool.
(In case we find more consistent data sources, we'd also
love to adapt our tool to use these instead.)


ImPlot — Simple image plotter.¶
This module defines the ImPlot class.
-
class
admit.util.ImPlot.
ImPlot
(pmode=None, ptype=None, figno=None, abspath='')[source]¶ Basic ADMIT image plotter that uses casa calls to create figures.
- uses CASA imview
- plot modes and plot types as in util.PlotControl
- keeps track of figure number
- make thumbnails if requested
See also
Attributes
plotmode
Get the plotting mode plottype
Get the plot type Methods
backend
(thebackend)figure
([figno])set the figure number. getFigure
(figno, relative)Get the name of the figure file for given figure number getThumbnail
(figno, relative)Get the name of the thumbnail file for given figure number makeThumbnail
([figno, scale, fig])Create a thumbnail for a given figure number. plotter
(figname[, rasterfile, contourfile, ...])Image plotter show
()show internals for debugging -
plotter
(figname, rasterfile=None, contourfile=None, colorwedge=False, thumbnail=True, zoom=1)[source]¶ Image plotter
Parameters: figname : str
Root of output file name. An extension matching the plot type will be appended. For instance, for, figname=’fig’ and plottype=PlotControl.PNG, the output file is ‘fig.png’
rasterfile : str
Image file to use as raster map. Optional if contourfile is given.
contourfile : str
Image file to use as contour map. Contours will be overlaid on rasterfile if both are given. Optional if rasterfile is given.
colorwedge : boolean
True - show color wedge, False - don’t show color wedge
thumbnail : boolean
If True, create a thumbnail when creating an output figure. Thumbnails will have ‘_thumb’ appended for file root. For instance, if the output file is ‘fig.png’, the thumbnail will be ‘fig_thumb.png’. Note: only PNG format is currently supported (matplotlib restriction, Exception raised otherwise).
zoom : int
Image zoom ratio.
Returns: None


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By utilizing light-weight frameworks i can guarantee a professional, modern & responsive result in a short period of time.
You'll be able to have high influence of the final result of your website, by using good communication i can reinsure that we get the result desired!
After launch i'll be available for assist for 7 days if any bugs or wanted changes are present and it wont cost any extra.
Hello! My name is Fredric Johansson, and I am an 18-year-old guy from Sweden. I'm currently studying Media and Design at a school here, I have around 4 years of experience in design at my hands. All my life I've loved creating and designing. My favorite hobby outside design is photography! I love creating in other words. Overall, I'm a pretty relaxed and cool guy. And I'd love to work with you!


Flux Generator
The Flux generator is not applied to an existing image sequence, but creates a new one itself. An existing image sequence would be overwritten without warning. But don't worry; using the Undo function you will get the old sequence back. However, it would not be wrong to save your work beforehand and to empty the memory with File => New.
This is the dialog for the Flux generator. Above the already known picture box. Below that are buttons for the flow direction, from which only one can be selected at a time. Then follows the dimensioning (width x height). The number of images determines the increment of the individual images in pixels (height or width divided by the number of images). The delay time in milliseconds applies to each individual image. Finally the Generate button.
First we load an image with the button that we want to let "flow". So-called seamless textures are very suitable for this. Here we use an image of flowing water that has been prepared for "seamless". It can be found under RunPNG/doc/samples/various/water 1.png. Width and height are taken from the image within the limits of the minimum and maximum values. In this case the picture happens to have the standard dimensions of the application. But that doesn't necessarily have to be the case.
Let's enter 10 as the number of images. This corresponds to a step width of 51.2 pixels. However, 0.2 pixels does not exist because the image buffers still work with integer indexes. So that there is no visible slippage with a higher number of steps, the loop works with floating point and rounds the number of pixels to be shifted up or down. Whereby the first picture is not shifted and the following pictures by the respective step size in the desired direction. What falls out at one end when the image is shifted will be reinserted at the opposite end.
After clicking the Generate button, it looks like this. 10 images were generated. Successively shifted downwards by 51 or 52 pixels. The sequence of images can be viewed with the player and of course saved for further use.


Privacy Policy
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This Privacy Policy applies only to our online activities and is valid for visitors to our website with regards to the information that they shared and/or collect in Front End Web Developer. This policy is not applicable to any information collected offline or via channels other than this website.
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The personal information that you are asked to provide, and the reasons why you are asked to provide it, will be made clear to you at the point we ask you to provide your personal information. If you contact us directly, we may receive additional information about you such as your name, email address, phone number, the contents of the message and/or attachments you may send us, and any other information you may choose to provide.
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Front End Web Developer follows a standard procedure of using log files. These files log visitors when they visit websites. All hosting companies do this and a part of hosting services' analytics. The information collected by log files include internet protocol (IP) addresses, browser type, Internet Service Provider (ISP), date and time stamp, referring/exit pages, and possibly the number of clicks. These are not linked to any information that is personally identifiable. The purpose of the information is for analyzing trends, administering the site, tracking users' movement on the website, and gathering demographic information. Our Privacy Policy was created with the help of the Privacy Policy Generator and the Disclaimer Generator
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You can choose to disable cookies through your individual browser options. To know more detailed information about cookie management with specific web browsers, it can be found at the browsers' respective websites.
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Request that a business that collects a consumer's personal data disclose the categories and specific pieces of personal data that a business has collected about consumers
Request that a business delete any personal data about the consumer that a business has collected. Request that a business that sells a consumer's personal data, not sell the consumer's personal data. If you make a request, we have one month to respond to you. If you would like to exercise any of these rights, please contact us.
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Front End Web Developer does not knowingly collect any Personal Identifiable Information from children under the age of 13. If you think that your child provided this kind of information on our website, we strongly encourage you to contact us immediately and we will do our best efforts to promptly remove such information from our records.


The G6 Chinese Input Method is a stroke-based Chinese input method
invented in the past decade. It encodes Chinese characters and phrases
by using at most six radicals and strokes with encoding rules to ensure
typing efficiency. In this project, Google Chrome OS is taken as a target
operating system for application development as there is a lack of
stroke-based Chinese Input Method available in this market.
The system is developed as a Chrome Extension Application. Related
properties like pop-up window, context menu, storage capabilities and
input-method editor (IME) provided by Chrome APIs maintain a
communication platform between the system and users to enhance the user
experience through Interactions conducted. On top of general rules of
the G6 Chinese Input Method, typing features like Single Hand Typing,
Word Prediction, Adaptive Ranking, Word Dictionary and My Favourite
Collection are developed during the implementation as some further
assistances to users in order to increase the effectiveness of typing
process based on personal habits.
This application is taken as 2019/2020 FYP of Mr. CHAU Kwun Wai, supervised by Dr. L.M. PO, in Dept of Electrical Engineering, City University of Hong Kong.


Year after year I thought about aspects that I could possibly change to create a more positive lifestyle. These were often things like ‘eat healthier’, ‘do more sports’, ‘quit smoking’ and so on. None of those actually ever happened (beside the smoking, but that was not at New Year’s Eve). And that is the point about resolutions. They never happen if you choose another time for it than now. Do not let yourself restrict too much from events like New Year’s Eve..
So this year I want to try something else. It is nothing new though, but something challenging I want to aim to get a deeper understanding about. I got inspired by Mark Zuckerberg who creates challenges for himself every year. I followed those on his Facebook account during the last years. He challenged himself with projects like ‘read a book every week’, ‘learn Mandarin’ or from this year: 'build an AI like Jarvis from Iron Man'. Those are measurable accomplishments and - most importantly - projects that advance yourself, I am talking about real challenges here.
So I sat down and started to think about projects I can accomplish during a year. A very important aspect of those challenges is to be realistic. A year might be a long time, but actually not as long as it seems at the beginning. Especially when you think about something you want to achieve during that time while working for a company and studying for your masters degree (like I do currently).
Let’s have a look at two projects that came to my mind:
- I want to write a blog post every week.
- I want to create an own programming language (with compiler/interpreter-toolchain).
Both are measurable, but not 100% defined. A blog post every week does not mean that I have to publish something valuable, technical every week. It could also be some random stuff. The blog posts will all be published here. Some (or maybe a lot of those) posts will be related to the second challenge.
I bought the freshly released book Writing An Interpreter In Go and really enjoyed the first chapters so far. I learned the basics of compiler and interpreters during the exam phase of my bachelor degree and even created a very basic compiler for the language pl0 during that time (Please do not look at the code 🙈). I definitely want to know more about that.
I want to get a deeper understanding why the Swift compiler e.g. is crashing in some occasions. Furthermore, I would like to know what I can do to fix these bugs. Building a compiler is a very low level task that is also very performance critical, so it is quite challenging and fits perfectly.
In this very moment, I do not want to define how complex that programming language is and what the features are. It will probably be a bit more than that pl0-thing on my Github, but of course it will not be as complex as modern compilers. I am giving you a further definition in future posts.
For now, that is all I want to write. So thanks for reading my first blog entry! Moreover, I am very curious what you want to achieve this year! Let me know on Twitter.
Thanks very much to my sister Anne who helped me a lot on the language side of this post!


Oksana Charkina
Researcher
- Department of Theoretical Physics,
- B. Verkin Institute for Low Temperature Physics & Engineering
- of the National Academy of Sciences of Ukraine
- 47 Nauky Ave., Kharkiv, 61103, Ukraine
- Graduated from Kharkov State University in 1995.
- Post-graduate Study in B. Verkin ILTPE of NASU, 1995-2001
- PhD Phys & Math, B. Verkin ILTPE of NASU, 2011.
Research area:
The theory of nonlinear phenomena in condensed matter physics based on the soliton concept and its applications for description of nonlinear effects in solids.
Last five years activity and current interests:
Subjects of current investigations include theoretical research of the non-stationary and internal dynamics of topological solitons and conditions of formation and propagation of bound soliton complexes and breather excitations in nonlinear systems with the strong dispersion, computer simulation of the soliton-complexes nonstationary dynamics, exact theoretical description of spin waves scattering by moving domain walls in anisotropic antiferromagnets in a magnetic field, an exact solution of the problem of the stability of discrete magnetic nanostructures and the spectral problem for their localized excitations in quasi-one-dimensional ferromagnet, and construction of the theory of the local negative magnetic permeability in nonlinear low-dimensional metamaterials and revealing a possibility of observation of breather excitations in such systems.
Educational activity:
National Technical University "Kharkiv Polytechnic Institute":
"Theoretical physics" – 2015-2018;
"Field Theory and Quantum Mechanics" – 2015-2018;
"Quantum Mechanics" – 2017-2018
Publications:
-
Zhuck N.P. Green's functions of Maxwell's equations for
the plane-layered Tellegen bi-isotropic medium /
N.P Zhuck, O.V. Charkina, S.N. Shul’ga // Journal of communications technology & electronics. – 1996. – V.41, No 1. – P. 22–28. -
Chishko K.A. Emission of electromagnetic waves by edge
dislocations moving in ionic crystals /
K.A. Chishko, O.V. Charkina // Physics of the Solid State. – 1996. – V.38, No 9. – P. 1521-1526. -
Chishko K.A. Radiation of electromagnetic waves from edge
dislocations moving in ionic crystals /
K.A. Chishko, O.V. Charkina // Materials Sciences & Engineering: A. – 1997. – V.234-236. – P. 361-364. -
Charkina O.V. Electromagnetic Emission of Mobile
Dislocation Segments in an Ionic Crystal /
O.V. Charkina, K.A. Chishko //
Physics of the Solid State. – 2001 – V.43, No 10. – P. 1898-1904. -
Antsygina T.N. Heat Capacity of 2D Solid Solution of
Diatomic Molecules in Rare Gas Matrix / T.N. Antsygina,
O.V. Charkina, M.I. Poltavskaya //
Journal of Low Temperature Physics. – 2005 – V.138, No 1/2. – P. 379-384. -
Charkina O.V. Internal Modes of Oscillations of
Topological Solitons in Highly Dispersive Media /
O.V. Charkina, M.M. Bogdan //
Uzhhorod University Scientific Herald. Series Physics. – 2005. – Iss.17. – P. 30-37. -
Charkina O.V. Internal Modes of Solitons and
Near-Integrable Highly-Dispersive Nonlinear Systems /
O.V. Charkina, M.M. Bogdan //
SIGMA (Symmetry, Integrability and Geometry: Methods and Applications). – 2006. – V. 2, No 047. – P. 1–12. -
Charkina O.V. Processes of formation of soliton complexes
and breathers in highly dispersive media /
O.V. Charkina, M.M. Bogdan //
Uzhhorod University Scientific Herald. Series Physics. – 2007. – Iss.21. – P. 196–204. [in Ukrainian]. -
Bogdan M.M. Dynamical features of bound states of
topological solitons in highly dispersive low-dimensional
systems / M.M. Bogdan,
O.V. Charkina //
Low Temperature Physics. – 2007. –V.33, No 12. – P. 1073–1076. -
Bogdan M.M. Dynamics and stability of solitons in the
sine-Gordon models with a strong dispersion /
M.M. Bogdan, O.V. Charkina //
Nonlinear world. – 2008. – V.6, No 5-6. – P. 324–333. [in Russian]. -
Bogdan M.M. Dynamics of bound soliton states in
regularized dispersive equations / M.M. Bogdan,
O.V. Charkina //
Low Temperature Physics. – 2008. – V.34, No 7. – P. 564–570. -
Bogdan M.M. Spin waves in easy-axis antiferromagnets with
precessing domain walls / M.M. Bogdan,
O.V. Charkina //
Low Temperature Physics. – 2014. – V.40, No 1. – P. 84-90. -
Bogdan M.M. Local negative magnetic permeability and
possibility of observation of breather excitations in magnetic
metamaterials / M.M. Bogdan, O.V. Charkina //
Low Temperature Physics. – 2014. – V.40, No 3. – P. 234–238. -
Spin-current resonances in a magnetically inhomogeneous 2D
conducting system / O.V. Charkina ,
A.N. Kalinenko, A.I. Kopeliovich, P.V. Pyshkin,
A.V. Yanovsky //
Physics Letters A. – 2016. – V.380. – P. 3678-3682. -
Charkina О.V. Localized excitations and scattering of
spin waves in ferromagnetic chains containing magnetic nanoclusters /
O.V. Charkina, M.M. Bogdan //
Low Temperature Physics. – 2018. – V.44, No 7. – P. 644-650. -
Bogdan M.M. The effect of the magnetic field on the
stability and excitation spectrum of spin nanoclusters in
anisotropic ferromagnetic chains / M.M. Bogdan,
V.I. Belan,
O.V. Charkina //
Low Temperature Physics. – 2018. – V.44, No 12. – P. 1331-1340.


Factory class that provides the general interface of a generating basis for a subring of a polynomial ring.
More...
#include <Symmetric_Basis.hpp>
|
| new_poly_t | operator() (orig_poly_t a) const |
| | Transform a polynomial on the original variables to one on the generating basis. More...
|
| |
| orig_poly_t | operator() (const new_poly_t &a) const |
| | Transform a polynomial on the generating basis into a polynomial on the original variables. More...
|
| |
| | PolynomialBasis (int num) |
| | Constructor given number of variables. More...
|
| |
| const std::vector< orig_poly_t > & | generators () const |
| | Returns vector containing the generating basis. More...
|
| |
| const std::vector< typename new_poly_t::deg_t > & | dimensions () const |
| | Returns vector containing the dimensions of the generating basis (can be empty!) More...
|
| |
| const std::vector< std::string > & | names () const |
| | Returns vector containing the names of the generating basis (can be empty!) More...
|
| |
|
| std::vector< orig_poly_t > | _generators |
| | The generators of the polynomial basis, constructed in the inheriting class. More...
|
| |
| std::vector< typename new_poly_t::deg_t > | generator_dimensions |
| | The dimensions of the generators, optionally constructed in the inheriting class. More...
|
| |
| std::vector< std::string > | generator_names |
| | The names of the generators, optionally constructed in the inheriting class. More...
|
| |
template<class spec_t, class orig_poly_t, class new_poly_t>
class symmp::PolynomialBasis< spec_t, orig_poly_t, new_poly_t >
Factory class that provides the general interface of a generating basis for a subring of a polynomial ring.
Inherit from this class and construct data member _generators through the child class (and optionally generator_names and generator_dimensions).
The child class must also have a method find_exponent
with signature:
typename new_poly_t::exp_t find_exponent(const typename orig_poly_t::exp_t&);
Example implementations are SymmetricBasis
and TwistedChernBasis
.
- Template Parameters
-
| spec_t | Used for compile-time polymorphism (CRTP): must be the child class. |
| orig_poly_t | Type of polynomial on the original variables |
| new_poly_t | Type of polynomial on the new variables (the _generators) |
◆ PolynomialBasis()
Constructor given number of variables.
- Parameters
-
| num | The number of variables for the polynomials |
◆ operator()() [1/2]
| new_poly_t operator() |
( |
orig_poly_t |
a | ) |
const |
Transform a polynomial on the original variables to one on the generating basis.
- Parameters
-
- Returns
- Polynomial on the new variables
◆ operator()() [2/2]
| orig_poly_t operator() |
( |
const new_poly_t & |
a | ) |
const |
Transform a polynomial on the generating basis into a polynomial on the original variables.
- Parameters
-
- Returns
- Polynomial on the original variables
◆ generators()
| const std::vector<orig_poly_t>& generators |
( |
| ) |
const |
Returns vector containing the generating basis.
◆ dimensions()
| const std::vector<typename new_poly_t::deg_t>& dimensions |
( |
| ) |
const |
Returns vector containing the dimensions of the generating basis (can be empty!)
◆ names()
| const std::vector<std::string>& names |
( |
| ) |
const |
Returns vector containing the names of the generating basis (can be empty!)
◆ number_of_variables
| const int number_of_variables |
The number of (the original) variables of the polynomial ring.
◆ _generators
| std::vector<orig_poly_t> _generators |
|
protected |
The generators of the polynomial basis, constructed in the inheriting class.
◆ generator_dimensions
| std::vector<typename new_poly_t::deg_t> generator_dimensions |
|
protected |
The dimensions of the generators, optionally constructed in the inheriting class.
◆ generator_names
| std::vector<std::string> generator_names |
|
protected |
The names of the generators, optionally constructed in the inheriting class.
The documentation for this class was generated from the following file:


JST / UTC の変換
SELECT * FROM log WHERE time >= "2019-03-01 05:00:00" AND time <= "2019-03-02 07:59:59";


Personally, I always thought I had a broad and deep understanding of the Internet, but the video selections were excellent and helped connect blurry points in my head. This class has been far more informative regarding technology and the history of it which as a nerd, I love!
William Herman lives in Tinton Falls, NJ and has a passion for sports, technology, and nonprofit organizations. He spent time in college as an intern for a nonprofit and developed an affinity for the sector. In addition to being a full time System Administrator for a contract management system and a part time graduate student, William works to connect students and newly graduates with opportunities at nonprofits. Proud owner of 16 shares of Tesla.


Due to a general lack of info on the 'net I've decided to submit my few pence worth as a regular user of these friendly little nuts known as Betel Nuts:
The nut itself is the fruit of the Betel palm (Areca Catechu), and comes fresh from the tree in a fibrous husk, which must be stripped off (ideally) before consumption. The nut inside, when fresh is quite soft and chewable (although it causes a real jawache doing this), and hardens as it dessicates (it finally turns brittle and powdery once completely deteriorated). The nut is also hard and fibrous, with a marble pattern running throughout the entire kernel. The surface texture is normally a light to dark brown and smooth, with a slightly mottled texture.
The effects of betel nut are comparable to a medium dose of ephedrine / ephedra in my opinion, but without the prevalent stomach tension I normally get. It has a nootropic effect, that is, it promotes a more acute memory, and a more perceptive frame of mind. I find that I can work more methodically and efficiently under its influence, as well as having a lot more energy and vitality. Users tend to generate a copious amount of saliva as well, especially if mineral lime has been added to the preparation. I've found myself drooling huge puddles of deep red saliva everywhere and I have to admit it's quite entertaining. It also constricts the user's pupils considerably.
I find the effects last between three and five hours, and begin to taper very subtly: It's hard to notice that the effects have diminished.
There are several betel nut preparations available commercially, these being pan masala, gutkha and betel mukwas.
Pan masala and gutkha is the most prolific of these products. The preparation normally consists of betel nut chunks dusted with lime and spices, and normally flavoured strongly with menthol (gutkha also contains flavoured tobacco, and is at present being banned by the authorities in India after a multitude of oral carcinomas being presented to Indian doctors). The products are normally used as a 'freshener' after meals, but as with any other habit this tendency has spread to use throughout the day. The participants will normally stuff a few of these 'nuggets' between the cheek and gum and allow the essence to infuse into their saliva. The saliva and the quid are expectorated, rather than swallowed (swallowing normally leads to nausea or heartburn, especially if lime is added).
Betel mukwas are normally aniseed flavoured sweets presented in bowls as an after dinner sweet in many indian restaurants. Although the taste is quite strong, it's also pretty sweet, and generally too much so for many people's liking.
Whole or chopped betel nuts can also be prepared as a quid, wrapped in the leaf of a betel pepper (piper betel). The leaves are supposed to have a mild stimulant effect in addition to the betel's stimulation. The nut, before being wrapped in the leaf may have spices, tobacco and lime added.
Now the bad news: Firstly, and most obviously, if betel nuts are overused, they can cause agitation, heart palpitations, insomnia and most of the other side effects of stimulant abuse.
Secondly, there's been an increasing correlation between Pan Masala / Betel use and oral carcinomas (mouth cancer). There have been cases in which the inner lining of the mouth (the cheek) of many habitual and long-term users has hardened, preventing these people from opening their mouths properly. It's not inevitable that it'll happen to all users, but there's a simple preventative step: MODERATION. Don't overdo it and you'll find that, rather than craving the drug, you'll learn to enjoy the sensations derived.
Peace
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


RT @avdi: That loud kid on the plane? Your chance to be a hero. Show them origami. Put on a sock puppet show.  Your chance to be a hero. Show them origami. Put on a sock puppet show. Everyone now loves you, yo ...
9/9/2012, 1:33:03 PM
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gganimate: A Lesson with Avocados
Animating your ggplots may sound daunting. However, you have to add a line or two extra of code and you have an animation! gganimate
makes animation quite accessible for users of ggplot.
A cheat sheet for what we’ll cover today:
- Types of Transitions
- transition_reveal() (good for mainly geom_line)
- transition_states() (good for geom_point, geom_bar, geom_col, etc)
- splits up plot data by a discrete variable and animates between the different states.
- transition_time() (geom_point)
- Instead of transitioning over a discrete variable, the transition occurs over a continuous variable (Time)
- Instead of transitioning over a discrete variable, the transition occurs over a continuous variable (Time)
- Some extras
- shadow_mark()
- This shadow lets you show the raw data behind the current frame. Both past and/or future raw data can be shown and styled as you want.
- This shadow lets you show the raw data behind the current frame. Both past and/or future raw data can be shown and styled as you want.
- shadow_wake()
- instead of leaving a more permanent mark, wake leaves a tail to show direction, but only reveals the past few states
- instead of leaving a more permanent mark, wake leaves a tail to show direction, but only reveals the past few states
- view_follow(fixed_y = TRUE)
- controls how your viewport changes as the transition occurs
- controls how your viewport changes as the transition occurs
anim_save()
- It works much like
ggsave()
from ggplot2 and automatically grabs the last rendered animation if you do not specify one directly.
- It works much like
- shadow_mark()
Let’s load back up our data from the previous lessons on R by Adriana Picoral (picoral.github.io/resbaz_intro_to_r/parti.html) and from Kathryn Busby on ggplot2. I’ll name the dataframe avocado
because I can’t remember what the other instructors named their data. We will also load our packages here.
library(tidyverse)
# install.packages("gganimate")
library(gganimate)
# install.packages("scales")
library(scales)
avocado <- read_csv("avocado.csv")
Avocado data is originally from www.kaggle.com/neuromusic/avocado-prices/data.
Let’s explore our data a little bit..
glimpse(avocado)
summary(avocado)
class(avocado$Date) #make sure `Date` is actually a date type
unique(avocado$region)# what type of regions are included here?
You’ll notice that our region variable is kind of all over the place. Because I’ve reviewed this before, I know we need to separate out the US level, states, regions, and cities so our graphs are on the same level.
avocado_us <- avocado %>% filter(region == "TotalUS")
states <- c("California")
avocado_CA <- avocado %>% filter(region %in% states)
regions <- c("West","Southeast","SouthCentral","Plains","Northeast","Midsouth","GreatLakes","WestTexNewMexico","NorthernNewEngland")
avocado_region <- avocado %>% filter(region %in% regions)
avocado_cities <- avocado %>% filter(!region %in% c("TotalUS", states, regions))
We’re finally ready to make some plots, and then build the animation into these plots.
transition_reveal()
This type of transition is the simplest and acts like a piece of paper is being removed from left to right over the top of the graph to slowly reveal the result. That’s how I think about it, at least. This assume that your x axis is also what is included inside your statement transition_reveal().
For this, let’s first build a static line plot that has date on the x-axis. Looking through the data, we could use AveragePrice
or Total Volume
on the y axis, and we could disaggregate by region, size of avocado, or type (organic versus conventional).
Let’s stick to the totalUS aggregation dataset we made (avocado_us) and look at the average price of conventional and organic avocados over time.
ggplot(data = avocado_us,
mapping = aes(x = Date, y = AveragePrice, color = type)) +
geom_line()
If we feel good on time, we can make a few adjustments to the plot before animating it.
ggplot(data = avocado_us,
mapping = aes(x = Date, y = AveragePrice, color = type)) +
geom_line() +
scale_y_continuous(labels = scales::dollar_format()) + # format that y axis!
scale_color_manual(values= c("darkgreen", "darkolivegreen3")) +
theme_minimal() +
labs(title = "Average Price of US Avocados",
caption = "Source: Kaggle")
This looks a lot better. I one what happened the summer of 2015! Now let’s animate this. The key to this animation is transition_reveal()
. Inside of the function, we can write out x axis variable. While it will take a few moments to render, you should see an animated plot in your plots pane.
ggplot(data = avocado_us,
mapping = aes(x = Date, y = AveragePrice, color = type)) +
geom_line() +
scale_y_continuous(labels = scales::dollar_format()) + # format that y axis!
scale_color_manual(values= c("darkgreen", "darkolivegreen3")) +
theme_minimal() +
labs(title = "Average Price of US Avocados",
caption = "Source: Kaggle") +
transition_reveal(Date)
Let’s also save this, since each time we run the code it takes some time.
anim_save(filename = "type_reveal.gif")
Challenge
Take a few minutes to try and plot the changes in total volume of organic avocados across time for the different regions of the USA.
transition_time()
Transition time creates new “layers” of the animation over a continous variable, usually time (i’ve never seen an exception to that). While this works best with geom_point, there’s many other options you can play around with.
Let’s use two continous variables to plot this. Let’s see how well price explains the volume sold of avocados for non-organic avocados (though, it’s been awhile since I took Econ101). Let’s do this for the different cities in the US, omitting states and regions.
avocado_cities_filtered <- avocado_cities %>%
filter(type == "conventional",
Date > as.Date("2018-01-01"))
ggplot(data = avocado_cities_filtered,
mapping = aes(x = AveragePrice, y = `Total Volume`, color = region)) +
geom_point()
That legend is really going to get in the way. Let’s remove it and customize the circles before animating.
ggplot(data = avocado_cities_filtered,
mapping = aes(x = AveragePrice, y = `Total Volume`, color = region)) +
scale_y_continuous(labels = scales::comma_format()) +
scale_x_continuous(labels = scales::dollar_format()) +
geom_point(aes(size = `Total Volume`), alpha = .6) +
theme_minimal() +
theme(legend.position = "none") +
labs(title = "Avocados sold by price and city")
In practice, the animation is basically layering a bunch of plots on top of each other, as if they were facet_wraps. When I’m planning out an animation, I often use facet_wrap like you learned this morning to see the different layers before I “assemble” them.
ggplot(data = avocado_cities_filtered,
mapping = aes(x = AveragePrice, y = `Total Volume`, color = region)) +
scale_y_continuous(labels = scales::comma_format()) +
scale_x_continuous(labels = scales::dollar_format()) +
geom_point(aes(size = `Total Volume`), alpha = .6) +
theme_minimal() +
theme(legend.position = "none") +
labs(title = "Avocados sold by price and city") +
facet_wrap(~Date)
Now we can move on to animating this. transition_time() will replace the previous dot, making it hard to see any trends. Let’s add shadow_wake
so we can see the direction between points.
One really cool trick I like to employ is writing in the subtitle what point in time we’re currently animating. Before it didn’t really matter because the date was on the x axis, but not its hidden. For that, we need to add some {}
in the subtitle argument of labs.
ggplot(data = avocado_cities_filtered,
mapping = aes(x = AveragePrice, y = `Total Volume`, color = region)) +
scale_y_continuous(labels = scales::comma_format()) +
scale_x_continuous(labels = scales::dollar_format()) +
geom_point(aes(size = `Total Volume`), alpha = .6) +
theme_minimal() +
theme(legend.position = "none") +
labs(title = "Avocados sold by price and city",
subtitle = "Date: {frame_time}") +
transition_time(Date) +
shadow_wake(wake_length = 0.2)
Let’s also save this, since each time we run the code it takes some time.
anim_save(filename = "type_time.gif")
Challenge
Can you use transition_time to show how the price of organic avocados change over time for California?
transition_state()
Transition_state() creates a new animation layer across a categorical variable instead of over time.
avocado_region_long <- avocado_region %>%
pivot_longer(cols = c(`4046`,`4225`,`4770`),
names_to = "size",
values_to = "volume")
ggplot(data = avocado_region_long,
mapping = aes(x = size, y = volume, color = size)) +
geom_boxplot()
Let’s customize this a little to make it look nicer.
ggplot(data = avocado_region_long,
mapping = aes(x = size, y = volume, color = size)) +
geom_boxplot() +
theme_classic() +
scale_y_continuous(labels = scales::comma_format()) +
labs(title = "Boxplot of volume sold by Avocado Size")
It isn’t particularly helpful that the previous view completely dissappears as in transition_time. Instead of using shadow_wake()
, let’s use shadow_mark()
to the animated plot to keep the past views visible.
ggplot(data = avocado_region_long,
mapping = aes(x = size, y = volume, color = size)) +
geom_boxplot() +
theme_classic() +
scale_y_continuous(labels = scales::comma_format()) +
labs(title = "Boxplot of volume sold by Avocado Size") +
transition_states(size, state_length = 1, transition_length = 1) +
shadow_mark(alpha = 0.3, size = 0.5)
Let’s also save this, since each time we run the code it takes some time.
anim_save(filename = "type_state.gif")
Challenge answers:
Challenge 1: Take a few minutes to try and plot the changes in total volume across time for the different regions of the USA.
ggplot(data = filter(avocado_region, type == "organic"),
aes(x = Date, y = `Total Volume`, color = region)) +
geom_line() +
theme_minimal() +
labs(title = "Average Price of US Avocados",
caption = "Source: Kaggle",
subtitle = "Date: {frame_along}") +
transition_reveal(Date)
anim_save("challenge_1.gif")
Challenge 2: Can you use transition_time to show how the price of organic avocados change over time for California?
ggplot(data = filter(avocado_CA, type == "organic"),
mapping = aes(x = Date, y = AveragePrice)) +
scale_y_continuous(labels = scales::dollar_format()) +
geom_point(alpha = .6) +
theme_minimal() +
theme(legend.position = "none") +
labs(title = "The fluctuating price of organic avocados in California",
subtitle = "Date: {frame_time}") +
transition_time(Date) +
shadow_wake(wake_length = 0.2)
anim_save("challenge_2.gif")


This panel shows messages output by the QC, aggregating, summarizing, and USGS data retrieval processes. If there are any errors when the tool runs, please copy the messages and send them and your input files to Erik Leppo (Erik.Leppo@tetratech.com).


WHAT'S EATING GILBERT GRAPE A film review by Steve Rhodes Copyright 1995 Steve Rhodes
RATING (0 TO ****): 1/2
WHAT'S EATING GILBERT GRAPE is a movie popular with the critics.   Also in it are Juliette Lewis as the girlfriend and Mary Steenburgen terribly miscast as a married woman with whom Depp is having an affair.
First, the good part. There is a 20 second clip of an architecturally interesting courthouse. The rest of the show is either boring or unbearably depressing. The first 60 minutes of the show took at least 3 hours. If I had been by myself, I would have walked out after 30 minutes tops. I felt the movie actually get worse as it went along.
Let me see if it is possible to chronicle some of the things I hated about this movie. Depp slept through it. [Wish I had!] He was clearly under heavy sedation at all times. He reminded the audience again and again about how lovely his mother used to be before she got to be a "beached whale" as he described her. He would take the local kids over to see his mother from a window like a barker at a side show. What a great kid!
A lot of the movie was devoted to the boy with a body of an 18 year old but the mind of a 3 year old and whether he would live to see his next birthday. The way it was handled ranged from fairly depressing to very depressing.
I did not care about any of the characters and got to hoping for a swarm of locus to sweep the plains and kill them all off so we could get a fresh set of actors. Sad to report that no such swarm appeared.
WHAT'S EATING GILBERT GRAPE runs an exhausting 1:58 due to sloppy editing by Andrew Mondshein. It is rated PG-13. For an excellent job of acting by DiCaprio I generously award the show one half of a star, give it a big thumbs down. People who suffering from depression should have their medication close by if they do decide to see it.
**** = One of the top few films of this or any year. A must see film. *** = Excellent show. Look for it. ** = Average movie. Kind of enjoyable. * = Poor show.  Totally unbearable.
REVIEW WRITTEN ON: March 21, 1994
Opinions expressed are mine and not meant to reflect my employer's.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
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|
pf
|
A class that performs sampling from a univariate Gamma distribution. More...
#include <rv_samp.h>
Public Member Functions | |
| UnivGammaSampler () | |
| Default-constructor ... | |
| UnivGammaSampler (float_t alpha, float_t beta) | |
| float_t | sample () |
| draws a random number. More... | |
| Public Member Functions inherited from rvsamp::rvsamp_base | |
| rvsamp_base () | |
| The default constructor. This is the only option available. Sets the seed with the clock. | |
Private Attributes | |
| std::gamma_distribution< float_t > | m_gamma_gen |
| makes gamma random variates | |
| float_t | m_alpha |
| mu | |
| float_t | m_beta |
| sigma | |
Additional Inherited Members | |
| Protected Attributes inherited from rvsamp::rvsamp_base | |
| std::mt19937 | m_rng |
| prng | |
A class that performs sampling from a univariate Gamma distribution.
| rvsamp::UnivGammaSampler< float_t >::UnivGammaSampler | ( | float_t | alpha, |
| float_t | beta | ||
| ) |
| alpha | a positive shape parameter. |
| beta | a positive scale parameter. |
| float_t rvsamp::UnivGammaSampler< float_t >::sample | ( | ) |
draws a random number.


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Let $\mathbf{X}=(X_{1},\ldots ,X_{m})$ be a random vector with density $f(t_{1},\ldots ,t_{m})$. Let $T:\mathbb{R}^{m}\rightarrow \mathbb{R}^{m}$ be a one-one function which is continuously differentiable (many exceptions can be made as remarked later).
Let $\mathbf{Y}=T(\mathbf{X})$. In co-ordinates we may write $\mathbf{Y}=(Y_{1},\ldots ,Y_{m})$ and $Y_{1}=T_{1}(X_{1},\ldots ,X_{m})$\dots $Y_{m}=T_{m}(X_{1},\ldots ,X_{m})$ where $T_{i}:\mathbb{R}^{m}\rightarrow \mathbb{R}$ are the components of $T$.
Question : What is the joint density of $Y_{1},\ldots ,Y_{m}$?
The change of variable formula : In the setting described above, the joint density of $Y_{1},\ldots ,Y_{m}$ is given by $$ g(\mathbf{y})=f\left(T^{-1}\mathbf{y}\right)\ \pmb{\big|} \ J[T^{-1}](\mathbf{y})\ \pmb{\big|} \ $$ where $J[T^{-1}](\mathbf{y})$ is the Jacobian determinant of the function $T^{-1}$ at the point $\mathbf{y}=(y_{1},\ldots ,y_{m})$.
Justification : We shall not prove this formula, but give a imprecise but convincing justification that can be made into a proof. There are two factors on the right. The first one, $f(T^{-1}\mathbf{y})$ is easy to understand - if $\mathbf{Y}$ is to be close to $\mathbf{y}$, then $\mathbf{X}$ must be close to $T^{-1}\mathbf{y}$. The second factor involving the Jacobian determinant comes from the volume change. Let us explain with analogy with mass density which is a more familiar quantity.
Consider a solid cube with non-uniform density. If you rotate it, the density at any point now is the same as the original density, but at a different point (the one which came to the current position). Instead of rotating, suppose we uniformly expand the cube so that the center stays where it is and the side of the cube becomes twice what it is. What happens to the density at the center? It goes down by a factor of $8$. This is simply because of volume change - the same mass spreads over a larger volume. More generally, we can have non-uniform expansion, we may cool some parts of the cube, heat some parts and to varying degrees. What happens to the density? At each point, the density changes by a factor given by the Jacobian determinant.
Now for a slightly more mathematical justification. We use the language for two variables ($m=2$) but the same reasoning works for any $m$. Fix twp point $\mathbf{x}=(x_{1},x_{2})$ and $\mathbf{y}=(y_{1},y_{2})$ such that $\mathbf{y}=T(\mathbf{x})$ (and hence $\mathbf{x}=T^{-1}(\mathbf{y})$). The density of $\mathbf{Y}$ at $\mathbf{y}$ is given by $$\begin{align*} g(\mathbf{y})&\approx \frac{1}{\mbox{area}(\mathcal N)}\mathbf{P}\{\mathbf{Y}\in \mathcal N\} \end{align*}$$ where $\mathcal N$ is a small neighbourhood of the point $\mathbf{y}$ (for example a disk of small radius $\delta$ centered at $\mathbf{y}$). By the one-one nature of $T$ and the relationship $\mathbf{Y}=T(\mathbf{X})$, we see that $$\mathbf{P}\{\mathbf{Y}\in \mathcal N\}=\mathbf{P}\{\mathbf{X}\in T^{-1}(\mathcal N)\}$$ where $T^{-1}(\mathcal N)$ is the image of $\mathcal N$ after mapping by $T^{-1}$. Now, $T^{-1}(\mathcal N)$ is a small neighbourhood of $\mathbf{x}$ (if $\mathcal N$ is a disk, then $T^{-1}(\mathcal N)$ would be an approximate ellipse) and hence, by the same interpretation of density we see that $$\begin{align*} \mathbf{P}\{\mathbf{X}\in T^{-1}(\mathcal N)\}&\approx \mbox{area}(T^{-1}(\mathcal N))f(\mathbf{x}) \end{align*}$$ Putting the three displayed equations together, we arrive at the formula $$ g(\mathbf{y})\approx f(\mathbf{x})\frac{\mbox{area}(T^{-1}(\mathcal N))}{\mbox{area}(\mathcal N)} $$ Thus the problem boils down to how areas change under transformations. A linear map $S(\mathbf{y})=A\mathbf{y}$ where $A$ is a $2\times 2$ matrix changes area of any region by a factor of $|\det(A)|$, i.e., $\mbox{area}(S(\mathcal R))=|\det(A)|\mbox{area}(\mathcal R)$.
The differentiability of $T$ means that in a small neighbourhood of $\mathbf{y}$, the mapping $T^{-1}$ looks like a linear map, $T^{-1}(\mathbf{y}+\mathbf h)\approx \mathbf{x}+DT^{-1}(\mathbf{y}){\bf h}$. Therefore, the areas of small neighbourhoods of $\mathbf{y}$ change by a factor equal to $|\det(DT^{-1}(\mathbf{y}))|$ which is the Jacobian determinant. In other words, $\mbox{area}(T^{-1}(\mathcal N))\approx |JT^{-1}(\mathbf{y})|\mbox{area}(\mathcal N)$. Consequently $g(\mathbf{y})=f(T^{-1}\mathbf{y})|JT^{-1}(\mathbf{y})|$.
Enlarging the applicability of the change of variable formula : The change of variable formula is applicable in greater generality than we stated above.
In particular, we see that $Y_{1}=X_{1}+X_{2}$ has density $h_{1}(t)=\int_{0}^{1}\lambda^{2}te^{-\lambda t}ds = \lambda^{2}te^{-\lambda t}$ (for $t > 0$) which means that $Y_{1}\sim \mbox{Gamma}(2,\lambda)$. Similarly, $Y_{2}=\frac{X_{1} }{X_{1}+X_{2} }$ has density $h_{2}(s)=\int_{0}^{\infty} \lambda^{2}t e^{-\lambda t}dt =1$ (for $s\in (0,1)$) which means that $Y_{2}$ has $\mbox{Unif}(0,1)$ distribution. In fact, $Y_{1}$ and $Y_{2}$ are also independent since $g(u,v)=h_{1}(u)h_{2}(v)$.
The change of variable formula works for transformations from $\mathbb{R}^{m}$ to $\mathbb{R}^{m}$ whereas here we have two random variables $X_{1},X_{2}$ and our interest is in one random variable $X_{1}+X_{2}$. To use the change of variable formula, we must introduce an auxiliary variable. For example, we take $Y_{1}=X_{1}+X_{2}$ and $Y_{2}=X_{1}/(X_{1}+X_{2})$. Then as in the first example, we find the joint density of $(Y_{1},Y_{2})$ using the change of variable formula and then integrate out the second variable to get the density of $Y_{1}$.
Let us emphasize the point that if our interest is only in $Y_{1}$, then we have a lot of freedom in choosing the auxiliary variable. The only condition is that from $Y_{1}$ and $Y_{2}$ we should be able to recover $X_{1}$ and $X_{2}$. Let us repeat the same using $Y_{1}=X_{1}+X_{2}$ and $Y_{2}=X_{2}$. Then, $T(x_{1},x_{2})=(x_{1}+x_{2},x_{2})$ maps $\mathbb{R}_{+}^{2}$ onto $Q:=\{(y_{1},y_{2}){\; : \;} y_{1} > y_{2} > 0\}$ in a one-one manner. The inverse function is $T^{-1}(y_{1},y_{2})=(y_{1}-y_{2},y_{2})$. It is easy to see that $JT^{-1}(y_{1},y_{2})=1$ (check!). Hence, by the change of variable formula, the density of $(Y_{1},Y_{2})$ is given by $$\begin{align*} g(y_{1},y_{2}) &= f(y_{1}-y_{2},y_{2})\cdot 1 \\ &= \lambda^{2}e^{-\lambda(y_{1}-y_{2})}e^{-\lambda y_{2} } \hspace{2mm}(\mbox{if }y_{1} > y_{2} > 0) \\ &= \lambda^{2}e^{-\lambda y_{1} }{\mathbf 1}_{y_{1} > y_{2} > 0}. \end{align*}$$ To get the density of $Y_{1}$, we integrate out the second variable. The density of $Y_{1}$ is $$\begin{align*} h(u) &= \int\limits_{-\infty}^{\infty}\lambda^{2}e^{-\lambda y_{1} }{\mathbf 1}_{y_{1} > y_{2} > 0} dy_{2} \\ &= \lambda^{2}e^{-\lambda y_{1} }\int\limits_{0}^{y_{1} }dy_{2} \\ &= \lambda^{2}y_{1}e^{-\lambda y_{1} } \end{align*}$$ which agrees with what we found before.


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Before Change
if result.error:
raise result.error
// Update the base class indexes for this request.
root_entries = result.root_products
address_entries = {k: v for k, v in root_entries.items() if k[1].product is BuildFileAddresses}
target_entries = {k: v for k, v in root_entries.items() if k[1].product is HydratedTargets}
self._index(target_entries)
yielded_addresses = set()
for (subject, _), state in address_entries.items():
After Change
raise AddressLookupError(str(e.exc))
except Exception as e:
raise AddressLookupError(
"Build graph construction failed: {} {}".format(type(e).__name__, str(e))
)
// Update the base class indexes for this request.


log - Procedures to log messages of libraries and applications.
The log package provides commands that allow libraries and applications to selectively log information about their internal operation and state.
To use the package just execute
package require log log::log notice "Some message"
As can be seen above, each message given to the log facility is associated with a level determining the importance of the message. The user can then select which levels to log, what commands to use for the logging of each level and the channel to write the message to. In the following example the logging of all message with level debug is deactivated.
package require log log::lvSuppress debug log::log debug "Unseen message" ; # No output
By default all messages associated with an error-level (emergency, alert, critical, and error) are written to stderr. Messages with any other level are written to stdout. In the following example the log module is reconfigured to write debug messages to stderr too.
package require log log::lvChannel debug stderr log::log debug "Written to stderr"
Each message level is also associated with a command to use when logging a message with that level. The behaviour above for example relies on the fact that all message levels use by default the standard command ::log::Puts to log any message. In the following example all messages of level notice are given to the non-standard command toText for logging. This disables the channel setting for such messages, assuming that toText does not use it by itself.
package require log log::lvCmd notice toText log::log notice "Handled by \"toText\""
Another database maintained by this facility is a map from message levels to colors. The information in this database has no influence on the behaviour of the module. It is merely provided as a convenience and in anticipation of the usage of this facility in tk-based application which may want to colorize message logs.
The following commands are available:
Returns the names of all known levels, in alphabetical order.
Converts any unique abbreviation of a level name to the full level name.
Converts any level name including unique abbreviations to the corresponding color.
Converts any level name including unique abbreviations to the corresponding priority.
Converts any level name including unique abbreviations to the command prefix used to write messages with that level.
Converts any level name including unique abbreviations to the channel used by ::log::Puts to write messages with that level.
Compares two levels (including unique abbreviations) with respect to their priority. This command can be used by the -command option of lsort. The result is one of -1, 0 or 1 or an error. A result of -1 signals that level1 is of less priority than level2. 0 signals that both levels have the same priority. 1 signals that level1 has higher priority than level2.
(Un)suppresses the output of messages having the specified level. Unique abbreviations for the level are allowed here too.
(Un)suppresses the output of messages having the specified level or one of lesser priority. Unique abbreviations for the level are allowed here too.
Asks the package whether the specified level is currently suppressed. Unique abbreviations of level names are allowed.
Defines for the specified level with which command to write the messages having this level. Unique abbreviations of level names are allowed. The command is actually a command prefix and this facility will append 2 arguments before calling it, the level of the message and the message itself, in this order.
Defines for all known levels with which command to write the messages having this level. The command is actually a command prefix and this facility will append 2 arguments before calling it, the level of the message and the message itself, in this order.
Defines for the specified level into which channel ::log::Puts (the standard command) shall write the messages having this level. Unique abbreviations of level names are allowed. The command is actually a command prefix and this facility will append 2 arguments before calling it, the level of the message and the message itself, in this order.
Defines for all known levels with which which channel ::log::Puts (the standard command) shall write the messages having this level. The command is actually a command prefix and this facility will append 2 arguments before calling it, the level of the message and the message itself, in this order.
Defines for the specified level the color to return for it in a call to ::log::lv2color. Unique abbreviations of level names are allowed.
Defines for all known levels the color to return for it in a call to ::log::lv2color. Unique abbreviations of level names are allowed.
Log a message according to the specifications for commands, channels and suppression. In other words: The command will do nothing if the specified level is suppressed. If it is not suppressed the actual logging is delegated to the specified command. If there is no command specified for the level the message won't be logged. The standard command ::log::Puts will write the message to the channel specified for the given level. If no channel is specified for the level the message won't be logged. Unique abbreviations of level names are allowed. Errors in the actual logging command are not caught, but propagated to the caller, as they may indicate misconfigurations of the log facility or errors in the callers code itself.
Like ::log::log, but logs the contents of the specified array variable arrayvar, possibly restricted to entries matching the pattern. The pattern defaults to * (i.e. all entries) if none was specified.
Like ::log::log, but assumes that data contains binary data. It converts this into a mixed hex/ascii representation before writing them to the log.
Like ::log::log, but msg may contain substitutions and variable references, which are evaluated in the caller scope first. The purpose of this command is to avoid overhead in the non-logging case, if the log message building is expensive. Any substitution errors raise an error in the command execution. The following example shows an xml text representation, which is only generated in debug mode:
log::logsubst debug {XML of node $node is '[$node toXml]'}
Convenience wrapper around ::log::log. Equivalent to ::log::log info text.
Convenience wrapper around ::log::log. Equivalent to ::log::log error text.
The standard log command, it writes messages and their levels to user-specified channels. Assumes that the suppression checks were done by the caller. Expects full level names, abbreviations are not allowed.
The package currently defines the following log levels, the level of highest importance listed first.
emergency
alert
critical
error
warning
notice
info
debug
Note that by default all messages with levels warning down to debug are suppressed. This is done intentionally, because (we believe that) in most situations debugging output is not wanted. Most people wish to have such output only when actually debugging an application.
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category log of the Tcllib Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.
When proposing code changes, please provide unified diffs, i.e the output of diff -u.
Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.
Programming tools
Copyright © 2001-2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>


---
title: Rapid Prototyping - Fabricator
layout: 2-column
section: Documentation
---
{{#markdown}}
# Rapid Prototyping
> How to use Fabricator to quickly build new views
Fabricator's [assembly engine](https://github.com/fbrctr/fabricator-assemble) is a powerful templating engine built on top of [Handlebars.js](http://handlebarsjs.com). It helps you compose new materials and prototypical pages with very little friction.
## Layouts
Layouts are wrappers for pages. You can define as many layouts as you want by creating `.html` files in your layouts directory.
Example layout:
```markup
{{{decode "%7B%7Btitle%7D%7D"}}}
{{{decode "%7B%25%20body%20%25%7D"}}}
```
View content is inserted in the `{{{decode "%7B%25%20body%20%25%7D"}}}` placeholder.
Context can be passed from a view to the layout via front-matter.
The layout that a view uses is also defined in front-matter:
```yml
---
layout: custom-layout
title: My Custom Layout
---
```
This would use `src/views/layouts/custom-layout.html`.
When no `layout` property is defined, the view uses the `default` layout.
## Views
Views are unique pages templated using Handlebars. These are both Fabricator pages and user-created pages.
Example view:
```markup
---
title: Document Name
name: World
---
{{{decode "%7B%7Bhome.greeting%7D%7D%2C%20%7B%7Bname%7D%7D"}}}!
{{{decode "%7B%7B%3E%20button%7D%7D"}}}
```
This outputs a page that uses the default layout (since no layout was defined).
The front-matter block at the top provides context to both the layout and the view itself.
Context is also piped in from [data files](/building-a-toolkit/data.html). In this example, `{{{decode "%7B%7Bhome.greeting%7D%7D"}}}` refers to the `greeting` property in `home.json`.
Fabricator pages are typically stored at the root level of the `views` directory and user-created views (e.g. "templates", "pages", "interfaces") should be stored in subdirectories:
```
└── views
├── templates
│ ├── about.html
│ └── home.html
├── components.html
├── docs.html
├── index.html
└── structures.html
```
{{/markdown}}


STAR TREK: INSURRECTION (1998)
A film review by Steve Kong Edited by Cher Johnson Copyright 1998 Steve Kong
If you're a Trekkie, serious or casual, you'll most likely know about the curse of the odd-numbered Star Trek films. But, for those of you who don't, here's a quick rundown of the movies. Number one was overly long. Number two is the best of the films featuring the original crew. Number three, was there a number three? Number four was a light-hearted and fun adventure. Number five, well, what can I say? William Shatner directed it. Number six was exciting. Number seven suffered because of Kirk and a mediocre story. Number eight, First Contact, is the best of the series - there's no beating the Borg as an enemy. Now, we have number nine - will it suffer the wrath of the odd-number?
Unlike First Contact, Insurrection is more light-hearted. The film reminded me a lot of The Voyage Home (IV) because it doesn't take itself too seriously. There are quite a few laughs in this film; I would say a few too many. This veers the film from light-hearted to campy.
Insurrection opens with Lt. Commander Data (Brent Spiner) on a field study of the Ba'ku, a Luddite-like culture. Data goes berserk and takes hostages. The Enterprise is called to come get Data before he is put out of commission. When the Enterprise arrives, a series of events thickens the plot. We find out that the Federation has made new partners with the Son'a and are studying the Ba'ku. The Son'a have ulterior motives for the study, though.
It seems that the planet the Ba'ku inhabit is surrounded by rings of a substance that continuously regenerates the cells of living organisms. This substance is of interest to the leader of the Son'a, Ru'afo (F. Murray Abraham), and is seen by Admiral Dougherty (Anthony Zerbe) as a saviour for the Federation. What could be better than the eternal life provided by the rings of the Ba'ku planet?
What Captain Picard (Patrick Stewart) finds is a ring of conspiracy within the Son'a/Federation partnership. He finds that the partnership is in violation of the Prime Directive (the Federation cannot interfere with technologically limited civilizations).
 It's obvious from the first twenty minutes that the writers are drawing parallels to the Europeans invading North America and ridding the land of the Native Americans.
One fun thing about going to a Star Trek film on opening night is the atmosphere of the crowd. The Star Trek crowd is different than all others. There is a loose Trekkie bond between people who don't know each other. While waiting, my friend Aaron and I talked to some beer-drinking Trekkies about different cameos in the different films (Christian Slater, Kirstie Alley, Kelsey Grammer, Christopher Lloyd) and in front of us was a guy dressed as Riker. There's nothing like going to a Star Trek film on opening night.
As for the film itself, I thought it was a bit too campy. It was an entertaining film, but there were a few flaws. First, and foremost, there was too much comedy in the film. I like to laugh, but Insurrection felt more like a comedy than a Star Trek film. From Worf's puberty to Riker and Troi running around like horny teenagers, this film just felt weird. Second, the special effects were awful - a full step behind those of First Contact. The new Enterprise looked like a cheezy model bought from a discount store - as did most of the ships in the film. I'm not sure if the production ran out of money for special effects or what, but they were not up to par with those presented in First Contact. And last, the plot felt like an overly long version of a TV episode.
The two good things about the film were director Jonathon Frakes and music composer Jerry Goldsmith. Frakes is able to keep the film moving at a brisk pace and Goldsmith is able to integrate the score into the film seamlessly. Goldsmith is one of the hardest working composers in Hollywood and I'm always delighted to hear his work.
The best performer in the film is Stewart. As always Stewart is a joy to see onscreen because he never fails to entertain. Kudos to Stewart for a great performance in Insurrection. Also kudos to Brent Spiner for another funny performance as Lt. Commander Data. Spiner gets some of the best moments of the film and he juices each and every one of them for its full entertainment value. F. Murray Abraham's Ru'afo is one of the less memorable bad guys in the Star Trek series. He doesn't even come close to Ricardo Montalban as Kahn in The Wrath of Khan.
All in all, Insurrection is not a bad film, but it still does suffer a little from the curse of being an odd-numbered film. I was fairly entertained by the end of the film, but not as much as I was after seeing First Contact. Though, I admit it is a hard task to follow up a brilliant film like First Contact. Catch Insurrection at matinee or on video.
[Rated PG – Some violence. Running Time: 103 Minutes]
--- Steve Kong<EMAIL_ADDRESS>recipe for a hard boiled review: one egg, two cups water, a pot, a helluva attitude, and a guy who loves the cinema. i'm your hard boiled movie guide.
http://boiledmovies.sbay.com/
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