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|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object javax.xml.bind.helpers.AbstractMarshallerImpl
public abstract class AbstractMarshallerImpl
Default implementation of a Marshaller. The JAXB provider needs
to implement only
Marshaller.marshal(Object, javax.xml.transform.Result)
.
Marshaller
| Field Summary |
|---|
| Fields inherited from interface javax.xml.bind.Marshaller |
|---|
JAXB_ENCODING, JAXB_FORMATTED_OUTPUT, JAXB_NO_NAMESPACE_SCHEMA_LOCATION, JAXB_SCHEMA_LOCATION |
| Constructor Summary | |
|---|---|
AbstractMarshallerImpl()
Creates a new instance of AbstractMarshallerImpl . |
| Method Summary | |
|---|---|
protected java.lang.String |
getEncoding()
Returns the current output encoding. |
ValidationEventHandler |
getEventHandler()
Returns an event handler previously registered by the application. |
protected java.lang.String |
getJavaEncoding(java.lang.String pEncoding)
Converts the given IANA encoding name into a Java encoding name. |
org.w3c.dom.Node |
getNode(java.lang.Object obj)
This method is unsupported in the default implementation and throws an UnsupportedOperationException . |
protected java.lang.String |
getNoNSSchemaLocation()
Returns the marshallers "no namespace" schema location. |
java.lang.Object |
getProperty(java.lang.String pName)
Public interface to get the properties defined by the Marshaller interface. |
protected java.lang.String |
getSchemaLocation()
Returns the marshallers schema location. |
protected boolean |
isFormattedOutput()
Returns whether the marshaller will create formatted output or not. |
void |
marshal(java.lang.Object pObject,
org.xml.sax.ContentHandler pHandler)
Marshals the given JAXB object by emitting SAX events into into the given SAX ContentHandler . |
void |
marshal(java.lang.Object pObject,
org.w3c.dom.Node pNode)
Marshals the given JAXB object by creating a DOM tree below the given node. |
void |
marshal(java.lang.Object pObject,
java.io.OutputStream pStream)
Marshals the given JAXB object pObject and
serializes it into the byte stream pTarget . |
void |
marshal(java.lang.Object pObject,
java.io.Writer pWriter)
Marshals the given JAXB object pObject and
serializes it into the character stream pTarget . |
protected void |
setEncoding(java.lang.String pEncoding)
Sets the current output encoding. |
void |
setEventHandler(ValidationEventHandler pHandler)
Allows the application to set an event handler. |
protected void |
setFormattedOutput(boolean pFormattedOutput)
Sets whether the marshaller will create formatted output or not. |
protected void |
setNoNSSchemaLocation(java.lang.String pNoNSSchemaLocation)
Sets the marshallers "no namespace" schema location. |
void |
setProperty(java.lang.String pName,
java.lang.Object pValue)
Public interface to set the properties defined by the Marshaller interface. |
protected void |
setSchemaLocation(java.lang.String pSchemaLocation)
Sets the marshallers schema location. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Methods inherited from interface javax.xml.bind.Marshaller |
|---|
marshal |
| Constructor Detail |
|---|
public AbstractMarshallerImpl()
Creates a new instance of AbstractMarshallerImpl
.
| Method Detail |
|---|
public void setEventHandler(ValidationEventHandler pHandler) throws JAXBException
Marshaller
Allows the application to set an event handler. The event handler will be invoked in case of a validation event.
Note: The ability to register an event handler does not
indicate that a JAXB provider is required to validate the objects
being marshalled. If you want to ensure, that only valid objects
are marshalled, you should perform an explicit validation using a
Validator
.
setEventHandler
in interface Marshaller
pHandler
- An application specific event handler or null to
revert to the default event handler. The default handler is
throwing an exception in case of errors.
JAXBException
public ValidationEventHandler getEventHandler() throws JAXBException
Marshaller
Returns an event handler previously registered by the application. The event handler will be invoked in case of a validation event.
Note: The ability to register an event handler does not
indicate that a JAXB provider is required to validate the objects
being marshalled. If you want to ensure, that only valid objects
are marshalled, you should perform an explicit validation using a
Validator
.
getEventHandler
in interface Marshaller
JAXBException
- An error occurred while getting the event
handler.public void setProperty(java.lang.String pName, java.lang.Object pValue) throws PropertyException
Public interface to set the properties defined
by the Marshaller
interface.
Works by invocation of setEncoding(String)
,
setFormattedOutput(boolean)
,
setNoNSSchemaLocation(String)
, and
setSchemaLocation(String)
internally.
If you want to support additional properties, you have to override this method in a subclass.
setProperty
in interface Marshaller
pName
- The property name.
PropertyException
- Unknown property namepublic java.lang.Object getProperty(java.lang.String pName) throws PropertyException
Public interface to get the properties defined
by the Marshaller
interface.
Works by invocation of getEncoding()
,
isFormattedOutput()
,
getNoNSSchemaLocation()
, and
getSchemaLocation()
internally.
If you want to support additional properties, you have to override this method in a subclass.
getProperty
in interface Marshaller
pName
- The property name.
PropertyException
- Unknown property nameprotected java.lang.String getEncoding()
Returns the current output encoding.
Marshaller.JAXB_ENCODING
protected java.lang.String getJavaEncoding(java.lang.String pEncoding) throws java.io.UnsupportedEncodingException
Converts the given IANA encoding name into a Java encoding name. This is a helper method for derived subclasses.
java.io.UnsupportedEncodingException
protected void setEncoding(java.lang.String pEncoding)
Sets the current output encoding.
Marshaller.JAXB_ENCODING
protected void setSchemaLocation(java.lang.String pSchemaLocation)
Sets the marshallers schema location. Defaults to null.
Marshaller.JAXB_SCHEMA_LOCATION
protected java.lang.String getSchemaLocation()
Returns the marshallers schema location. Defaults to null.
Marshaller.JAXB_SCHEMA_LOCATION
protected void setNoNSSchemaLocation(java.lang.String pNoNSSchemaLocation)
Sets the marshallers "no namespace" schema location. Defaults to null.
Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
protected java.lang.String getNoNSSchemaLocation()
Returns the marshallers "no namespace" schema location. Defaults to null.
Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
protected void setFormattedOutput(boolean pFormattedOutput)
Sets whether the marshaller will create formatted output or not. By default it does.
Marshaller.JAXB_FORMATTED_OUTPUT
protected boolean isFormattedOutput()
Returns whether the marshaller will create formatted output or not. By default it does.
Marshaller.JAXB_FORMATTED_OUTPUT
public final void marshal(java.lang.Object pObject, java.io.OutputStream pStream) throws JAXBException
Marshaller
Marshals the given JAXB object pObject
and
serializes it into the byte stream pTarget
. Note,
that serialization into a byte stream demands the use of an
encoding. It may be required to set the parameter
Marshaller.JAXB_ENCODING
. By default the created output is
formatted, which may be turned off using
Marshaller.JAXB_FORMATTED_OUTPUT
.
marshal
in interface Marshaller
pObject
- The JAXB object being marshalled.pStream
- The output byte stream.
JAXBException
- An unexpected problem occurred. This may be used,
for example, to throw a nested IOException
.
MarshalException
- Whereever possible, one should prefer the
MarshalException
over the JAXBException
.Marshaller.JAXB_ENCODING
,
Marshaller.JAXB_FORMATTED_OUTPUT
,
Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
,
Marshaller.JAXB_SCHEMA_LOCATION
public final void marshal(java.lang.Object pObject, java.io.Writer pWriter) throws JAXBException
Marshaller
Marshals the given JAXB object pObject
and
serializes it into the character stream pTarget
.
Unlike serialization to a byte stream, an encoding is not
required, but a Marshaller
may use the encoding
whether to escape a character or not. Use of the
Marshaller.JAXB_ENCODING
property is still recommended. By
default the created output is
formatted, which may be turned off using
Marshaller.JAXB_FORMATTED_OUTPUT
.
marshal
in interface Marshaller
pObject
- The JAXB object being marshalled.pWriter
- The output character stream.
JAXBException
- An unexpected problem occurred. This may be used,
for example, to throw a nested IOException
.
MarshalException
- Whereever possible, one should prefer the
MarshalException
over the JAXBException
.Marshaller.JAXB_ENCODING
,
Marshaller.JAXB_FORMATTED_OUTPUT
,
Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
,
Marshaller.JAXB_SCHEMA_LOCATION
public final void marshal(java.lang.Object pObject, org.xml.sax.ContentHandler pHandler) throws JAXBException
Marshaller
Marshals the given JAXB object by emitting SAX events into
into the given SAX ContentHandler
. This
includes the events ContentHandler.startDocument()
and ContentHandler.endDocument()
.
marshal
in interface Marshaller
pObject
- The JAXB Object being marshalled.pHandler
- The target event handler.
JAXBException
- An unexpected problem occurred. This may be used,
for example, to throw a nested SAXException
.
MarshalException
- Whereever possible, one should prefer the
MarshalException
over the JAXBException
.Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
,
Marshaller.JAXB_SCHEMA_LOCATION
public final void marshal(java.lang.Object pObject, org.w3c.dom.Node pNode) throws JAXBException
Marshaller
Marshals the given JAXB object by creating a DOM tree below the given node.
marshal
in interface Marshaller
pObject
- The JAXB object being marshalled.pNode
- The target node. This node must be ready to accept a
child element. For example, it may be a Document
,
a DocumentFragment
, or an
Element
.
JAXBException
- An unexpected problem occurred. This may be used,
for example, to throw a nested DOMException
.
MarshalException
- Whereever possible, one should prefer the
MarshalException
over the JAXBException
.Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION
,
Marshaller.JAXB_SCHEMA_LOCATION
public org.w3c.dom.Node getNode(java.lang.Object obj) throws JAXBException
This method is unsupported in the default implementation
and throws an UnsupportedOperationException
.
getNode
in interface Marshaller
obj
- The JAXB object being viewed.
java.lang.UnsupportedOperationException
- This method is not available in the
default implementation.
JAXBException
- An unexpected problem occurred. This may be used,
for example, to throw a nested DOMException
.
|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |


Computing
https://github.com/barryquinn1 || My GitHub
https://docs.github.com/en || GitHub Docs
https://docs.rstudio.com || Rstudio docs
https://r4ds.had.co.nz/index.html || R for Data Science
https://pandas.pydata.org/pandas-docs/stable/index.html || Python Docs
https://www.rstudio.com/resources/cheatsheets/ || RStudio Cheatsheets
https://adv-r.hadley.nz || Advanced R
https://bookdown.org/yihui/bookdown/ || bookdown
https://bookdown.org/yihui/rmarkdown/ || R Markdown
https://www.datascienceatthecommandline.com || Data Science at the Command Line
Research
https://docs.google.com/spreadsheets/d/1btlBk4S2uLtezMZySh10SiTzbJo8KY3gk-KMqhrcRTk/edit?usp=sharing || ABS2015
https://qub-shib.qub.ac.uk/idp/profile/SAML2/POST/SSO;jsessionid=4A0641601F2F4362E702F9BF6828F4BE?execution=e1s1 || QUB Scopus
Data
http://marketintelligence.spglobal.com/ || S&P MI
https://my.refinitiv.com || Refinitiv
Cloud computing
https://q-rap.qub.ac.uk/rstudio || RStudio
https://q-rap.qub.ac.uk/rstudio/admin/users || server admin
https://q-rap.qub.ac.uk/rsconnect || connect
https://www.digitalocean.com || Digital Ocean
https://portal.azure.com/#home || Azure
https://github.com/QMS-Quant-Finance || GitHub QuantFinance
Books
http://otexts.org/fpp2 || Forecasting: Principles and Practice
http://www.cambridge.org/gb/academic/textbooks/introductory-econometrics#UIFlXhl5PyWZu7t8.97 || Brooks Resources
http://encore.qub.ac.uk/iii/encore/search/C__Sthe%20basics%20of%20financial%20econometrics__Orightresult__U__X0?lang=eng&suite=def || Fobazzi (2014)
https://www-cambridge-org.queens.ezp1.qub.ac.uk/core/books/regression-and-other-stories/DD20DD6C9057118581076E54E40C372C || Regressions and other Stories
https://rstudio4edu.github.io/rstudio4edu-book/ || RStudio Edu Book
Queens
https://www.davyselect.ie/ || Live SMF
https://turnitinuk.com/ || turnitin
http://libguides.qub.ac.uk/management || QMS Library
https://offcampus.qub.ac.uk/Citrix/XA7StoreWeb/ || Citrix
https://www.ssrn.com/link/Queens-Management-BSR.html || QMS working paper series
http://go.qub.ac.uk/MScFinRiskQFin || Masters Calendar
Personal
https://www.halifax-online.co.uk || Credit Card
https://online.hl.co.uk/my-accounts || Investments
https://www.wpa.org.uk || Health Insurance
https://accounts.firmusenergy.co.uk/ || firmus
https://www.gov.uk/sign-in-childcare-account || TaxFree Child Care
https://www.legalandgeneral.com/insurance/ || House Insurance
https://www.tax.service.gov.uk/personal-account || Personal Tax Account


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| Since every programmer usually knows at least one C-style language (C/C++/C#/Java/JavaScript/PHP etc.), a quick way to get to know Lobster is seeing how it differs from what you're familiar with. Where C-style languages differ I will by default pick C# (as being the most "average" of the range), though sometimes may show multiple language alternatives (as noted in the comments). This document mostly focusses on things that are different, i.e. you will not see how a + b in Lobster is the same as a + b in C#. |
| Lobster version | C-style version | Comments |
| a = 1 | a = 1; | Assign existing variable. |
| var a = 1 | int a = 1; | Create new variable, type thru type inference. |
| let a = 1 | const int a = 1; | Create constant variable. |
| let a, b = 1, 2 | int a = 1; int b = 2; | Define multiple at once. |
| let a, b = f() | int a = f(&b); | Define multiple from a function returning multiple values. |
| let v = [ 1, 2, 3 ] | int[] v = new int[] { 1, 2, 3 }; | The type of vectors is inferred. They are also resizable, so they are probably more akin a C# List than an array. |
| let w = v + v | vec3 w = new Vec3; w.x = v.x + v.x; w.y = v.y + v.y; w.z = v.z + v.z; |
Vector operation exist for most operators and functions. |
| nil | null | Nil is more strict in lobster, in that a reference type which can be nil is different from those that are never nil, and you explicitly convert between them. |
| a or b and c | (a || b) && c | These are really the only operators that are different. |
| let a = f() or g() | var a = f(); if (a == null) a = g(); |
The or operator works slightly differently in that rather than returning true, it returns whatever value was true (and true is everything that is not nil, false, 0 or 0.0) |
| Lobster version | C-style version | Comments |
| if a: b else: c | if (a) b; else c | |
| if a: b c else: d e |
if (a) { b; c; } else { d; e; } |
|
| for(m) i: print i | for (int i = 0; i < m; i++) print(i); | |
| for m: print _ | for (int i = 0; i < m; i++) print(i); | |
| for(m) i: print i |
for (int i = 0; i < m; i++) { print(i); } |
|
| while a: b | while (a) b; | |
| for(list) a, i: print a print i |
for(int i = 0; i < list.size(); i++) { auto a = list[i]; print(a); print(i); } |
Where `a` is the item at index `i` of `list. |
| for(list): print _ print _i |
for(int _i = 0; _i < list.size(); _i++) { auto _ = list[_i]; print(_); print(_i); } |
Where `_` is the item at index `_i` of `list`. Here `_` and `_i` are anonymous parameters that Lobster auto populates. They must be prefixed with `_`, and are assigned by their declaration order in the body. |
| for(list) a: print a | foreach (var a in list) print(a); | |
| let a = switch i: case 1: "no" case 2, 4..6: "yes" default: "maybe" | switch (i) { case 1: a = "no"; break; case 2: case 4: case 5: case 6: a = "yes"; break; default: a = "maybe"; } | |
| let r = map(list) x: x * x | var r = new List(); foreach(var x in list) r.Add(x * x); |
(map needs: import std) |
| let r = map(list) x: x * x | var r = list.ConvertAll(x => x * x); | C# and pretty much all programming languages except for Java (< 8) can nowadays use some form of lambdas that are similar but not quite as powerful as the ones in Lobster (for example, you can't use "return" to break out of a loop). |
| let r = filter list: _ > 0 | var r = new List(); foreach (var x in list) if (x > 0) r.Add(x); |
|
| let r = exists list: _ > 0 | var r = false; foreach (var x in list) if (x > 0) { r = true; break; } |
| Lobster version | C-style version | Comments |
| def name(a:int, b:int) -> int: return a + b | int name(int a, int b) { return a + b; } | In Lobster it is unusual to specify types, especially the return type. |
| def name(a, b): return a + b |
T name<T>(T a, T b) { return a + b; } | By default function are declared without types, and automatically inferred on use. |
| def name(a, b): return a + b |
T name<T>(T a, T b) { return a + b; } |
For multiple lines, use indentation. |
| def magnitude(v::xy): return sqrt(x * x + y * y) |
// inside class xy float magnitude() { return sqrt(x * x + y * y); } |
The :: way to indicate a type (v is of type xy) allows you to access object elements directly rather than having to write v.x etc. This is similar to writing a method, though Lobster makes no such distinction. |
| // inside class/struct xy def magnitude(): return sqrt(x * x + y * y) | // inside class xy float magnitude() { return sqrt(x * x + y * y); } | This is an equivalent way of writing the above when inside the scope of a class/struct (see below). |
| v.magnitude() | v.magnitude() | On a function call, you can move the first argument to before the call, for any function, not just "methods". |
| def name(x:X): return 0 def name(y:Y): return 1 |
/* inside class X */ int name() { return 0; } /* inside class Y */ int name() { return 1; } |
You write multiple function implementations for multiple types, which can then be called and resolved either statically (overloading) or dynamically (dynamic dispatch) depending on the situation. These functions can work on user defined types or builtin ones. They can be written by whoever wrote the type (even in-line in the class definition), or completely separately. |
| let f = def(a, b): a + b | var f = (int a, int b) => a + b | Function value in C# |
| let f = def(a, b): a + b | auto f = [](int a, int a) { return a + b; } | Function value in C++ |
| def fold(xs, init, fun): for(xs): init = fun(init, _) return init |
T fold<T>(List<T> xs, T init, Func<T, T, T> fun) { foreach (var x in xs) init = fun(init, x); return init; } |
How to write a Higher Order Function: a function that takes a function argument. In this case "fold": take a list, and apply the function to each element and the previous result, effectively "folding" the list into a single value. |
| let r = fold(list, 0) a, b: a + b | var r = fold(list, 0, (a, b) => a + b); | How to call that function with a function value. This sums all values in a list. |
| let r = fold(list, 0): _a + _b | var r = fold(list, 0, (a, b) => a + b); | Anonymous arguments in lexical order, see language reference. |
| let r = fold(list, 0) a, b: print a a + b |
var r = fold(list, 0, (a, b) => { print(a); return a + b; }); |
Note how in most languages lambda syntax becomes messy when you want to use them with a larger body, and looking very different from builtin control structures. |
| let r = fold(list, 0) a, b: if a < 0: return a a + b |
/* not possible */ | Another way in which lambdas in most languages differ from Lobster: you cannot return/break from the loop, making them often useless as control structures. In Lobster, they function just like real constrol structures would. By default, return returns from the lexically enclosing named function. |
| def f(): g() return 0 def g(): if something: return 1 from f return 0 |
int f() { try { g(); return 0; } catch (int x) { return x; } } int g() { if (something) throw 1; return 0; } |
Return even allows you to specify which function to return from, which in other languages you can do with exception handling. In fact, exception handling in Lobster is not a language feature, it is simply some utility functions (try/catch/...) implemented on top of return/from (implemented in exception.lobster). |
| def mret(): return 1, 2 | int mret(out int o) { o = 2; return 1; } | |
| let a, b = mret() | var b; var a = mret(&b); |
| Lobster version | C-style version | Comments |
| struct xy: x:float y:float |
public struct xy { float x; float y; } | |
| struct xy<T> x:T y:T |
public struct xy<T> { T x; T y; } | Generics: unlike functions, these are explicitly specified in Lobster. |
| struct xyz : xy: z:float |
public struct xyz : xy { float z; } | Inheritance. |
| let v = xyz { 1, 0, 0 } | var v = new xyz(1, 0, 0) | You'd actually have to define the constructor in C# to be able to do this. |
| struct xy: x:float y:float def magnitude(): return sqrt(x * x + y * y) | public class xy { float x; float y; float magnitude() { return x * x + y * y; } } | Intendation based syntax, with inline function definition (automatic this argument). |
| enum color: red = 1 green blue yellow = 10 | enum color { red = 1, green, blue, yellow = 10 } |


Graham demands Biden documents from State Department South Carolina Sen. Lindsey Graham on Hunter Biden, impeachment hearings on 'Hannity.' 21 Nov 2019, 00:29 by Arutz Sheva Staff


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How to get a cross-project feature landed in OpenStack
Or how I plotted to obtain success...
Who am I?
OpenStack Ironic core contributor
Developer Advocate @ IBM
email<EMAIL_ADDRESS>twitter: @ashinclouds
Quick Secret: When I started, I was just a crazy person in the room!
A little background!
So you want to add a feature?
Tossing code at the wall doesn't always help!
But getting consensus about tossing code upon the wall could...
The Beginning!
The Thinking Time
Beverage consumption time!
Be realistic
Momentum!
Meetings are actually a good thing!
Looking back, I learned a lot!
Thanks!
https://juliakreger.github.io/talks/plot-success.html


VIS for an open source similarity vector search engine - This page goes over visual aspects of the program. To learn more about the application, visit milvus.io.


-
.sraCSS
-
The ".sraCSS" property contains the inline styling values that render screen reader accessible hidden text.
-
screen reader accessible hidden text is visible to screen reader users while remaining invisible to sighted users, which has no affect on visual layout.
Values: {
position: "absolute", clip:" rect(1px 1px 1px 1px)", padding: 0, border: 0, height: "1px", width:"1px", overflow: "hidden", zIndex: -1000
}
Syntax
// From within an AccDC Object
$A([
{
runAfter: function(dc){
// Get the element
var el = $A.getEl('objId');
// Then make it invisible to sighted users, but keep it visible for screen reader users
$A.css(el, dc.sraCSS);
},
...
}
]);
// Or using the global $A namespace instead
$A.css(el, $A.sraCSS);
-
.sraCSSClear()
-
The ".sraCSSClear()" method clears all CSS styles previously set using sraCSS.
-
Values cleared: [
position, clip, padding, height, width, overflow, zIndex
]
Syntax
// From within an AccDC Object
$A([
{
runAfter: function(dc){
// Get the element
var el = $A.getEl('objId');
dc.sraCSSClear(el);
},
...
}
]);
// Or using the global $A namespace instead
$A.sraCSSClear(el);
-
.role
-
The "role" property sets the beginning and ending screen reader accessible hidden boundary text for an AccDC Object.
-
The "role" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Syntax
$A([
{
role: 'Menu',
...
}
]);
// Or
$A.reg.myObj.role = 'Settings Tab';
Important
-
The "role" property should contain a short concise (one to three word) summary of the AccDC Object's purpose.
-
The automatic rendering of the "role" property for screen reader users can be enabled/disabled using the "showHiddenBounds" property.
-
When the "showHiddenBounds" property is set to True, the "role" property value is prepended to the "accStart" and "accEnd" property values.
-
.accStart
-
The "accStart" property sets the beginning screen reader accessible hidden text for an AccDC Object.
-
The "accStart" property value is appended to the "role" property value at runtime;
The "accStart" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: "Start"
Syntax
$A([
{
accStart: 'Begin',
...
}
]);
// Or
$A.reg.myObj.accStart = 'Start';
Important
-
The automatic rendering of the "accStart" property value for screen reader users can be enabled/disabled using the "showHiddenBounds" property.
-
When the "showHiddenBounds" property is set to True, the "accStart" property value is appended to the "role" property value.
-
.accEnd
-
The "accEnd" property sets the ending screen reader accessible hidden text for an AccDC Object.
-
The "accEnd" property value is appended to the "role" property value at runtime;
The "accEnd" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: "End"
Syntax
$A([
{
accEnd: 'End',
...
}
]);
// Or
$A.reg.myObj.accEnd = 'End';
Important
-
The automatic rendering of the "accEnd" property value for screen reader users can be enabled/disabled using the "showHiddenBounds" property.
-
When the "showHiddenBounds" property is set to True, the "accEnd" property value is appended to the "role" property value.
-
.ariaLevel
-
The "ariaLevel" property sets the heading level of an AccDC Object for screen reader users.
-
Values: 1 through 6 (default=2)
Syntax
$A([
{
ariaLevel: 3,
...
}
]);
// Or
$A.reg.myObj.ariaLevel = 4;
-
.showHiddenBounds
-
The "showHiddenBounds" property enables/disables the rendering of screen reader accessible hidden boundary text for screen reader users.
-
Default: True
Syntax
$A([
{
showHiddenBounds: false,
...
}
]);
// Or
$A.reg.myObj.showHiddenBounds = false;
-
.accClose
-
The "accClose" property sets the Text for the screen reader accessible hidden close link at the end of an AccDC Object.
-
The "accClose" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: "Close"
Syntax
$A([
{
accClose: 'Exit',
...
}
]);
// Or
$A.reg.myObj.accClose = 'Dismiss';
Important
-
The automatic rendering of the "accClose" property value for screen reader users can be enabled/disabled using the "showHiddenClose" property.
-
When the "showHiddenClose" property is set to True, the "accClose" property value is prepended to the "role" property value.
-
The "dc.fn.closeLink" property can be used to access the DOM node for the screen reader accessible hidden close link at runtime.
-
.showHiddenClose
-
The "showHiddenClose" property enables/disables rendering of the screen reader accessible hidden close link at the end of an AccDC Object.
-
Default: True
Syntax
$A([
{
showHiddenClose: false,
...
}
]);
// Or
$A.reg.myObj.showHiddenClose = true;
-
.displayHiddenClose
-
The "displayHiddenClose" property controls whether the screen reader accessible hidden close link will appear in the tab order for keyboard users.
-
Default: True
When set to True, the hidden Close link will become visible when it receives keyboard focus.
(This is a U.S. Section-508 requirement)
When set to False, the hidden Close link will not appear in the tab order, though it will still be rendered for screen reader users.
Syntax
$A([
{
displayHiddenClose: false,
...
}
]);
// Or
$A.reg.myObj.displayHiddenClose = true;
Required:
-
The "showHiddenClose" property must be set to True.
-
.tabRole
-
The "tabRole" property sets the screen reader accessible hidden role text for an AccDC Tab Control, which is added to the triggering element.
-
The "tabRole" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: "Tab"
Syntax
$A([
{
tabRole: 'Map',
...
}
]);
// Or
$A.reg.myObj.tabRole = 'Wizard Step 1';
Important
-
The "tabRole" property should contain a short concise (one to three word) summary of the AccDC Object's intended functionality.
-
The "tabRole" property value is appended to the text within the triggering element, and is rendered before the "tabState" property value for screen reader users.
Required:
-
The "isTab" property must be set to True;
-
.tabState
-
The "tabState" property sets the screen reader accessible hidden state text for an AccDC Tab Control, which is added to the triggering element.
-
The "tabState" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: "Selected"
Syntax
$A([
{
tabState: 'Open',
...
}
]);
// Or
$A.reg.myObj.tabState = 'Expanded';
Important
-
The "tabState" property should contain a short concise (one word) summary of the AccDC Object's Active State.
-
The "tabState" property value is appended to the text within the triggering element, and is rendered after the "tabRole" property value for screen reader users.
Required:
-
The "isTab" property must be set to True.
-
.toggleRole
-
The "toggleRole" property sets the screen reader accessible hidden role text for an AccDC Toggle Control, which is added to the triggering element.
-
The "toggleRole" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: ""
Syntax
$A([
{
toggleRole: 'Menu',
...
}
]);
// Or
$A.reg.myObj.toggleRole = 'Checkbox';
Important
-
The "toggleRole" property should contain a short concise (one to three word) summary of the AccDC Object's intended functionality.
-
The "toggleRole" property value is appended to the text within the triggering element, and is rendered before the "toggleState" property value for screen reader users.
Required:
-
The "isToggle" property must be set to True.
-
.toggleState
-
The "toggleState" property sets the screen reader accessible hidden state text for an AccDC Toggle Control, which is added to the triggering element.
-
The "toggleState" property is rendered using screen reader accessible hidden text via "sraCSS", which is invisible to sighted users and has no affect on visual layout.
Default: ""
Syntax
$A([
{
toggleState: 'Open',
...
}
]);
// Or
$A.reg.myObj.toggleState = 'Checked';
Important
-
The "toggleState" property should contain a short concise (one word) summary of the AccDC Object's active state.
-
The "toggleState" property value is appended to the text within the triggering element, and is rendered after the "toggleRole" property value for screen reader users.
Required:
-
The "isToggle" property must be set to True.
-
.forceFocus
-
The "forceFocus" property determines if focus is automatically moved to the beginning of an AccDC Object when opened.
-
Default: False
Syntax
$A([
{
forceFocus: true,
...
}
]);
// Or
$A.reg.myObj.forceFocus = false;
-
.returnFocus
-
The "returnFocus" property determines if focus is automatically returned to the triggering element when an AccDC Object is closed.
-
Default: True
Syntax
$A([
{
returnFocus: false,
...
}
]);
// Or
$A.reg.myObj.returnFocus = true;
-
.announce
-
The ".announce" property specifies that the textual content of an AccDC Object will automatically be announced to screen reader users when opened.
-
Syntax
$A([
{
announce: true,
...
}
]);
-
.announce()
-
The "$A.announce()" method announces the text of any string or DOM node to screen reader users.
-
"$A.announce()" is also prototyped to the String object.
Syntax
$A([
{
runAfter: function(dc){
// Announce the content of a DOM node
$A.announce(dc.containerDiv);
},
...
}
]);
// Or
// Announce a string, and return the string literal
var str = "Hello World".announce();
// Or
// Announce the content of a DOM node, and suppress the announcement of repetitive strings
$A.announce(document.getElementById('lastChatMsg'), true);
// Or
// Temporarily override the suppression of repetitive strings
String.announce.lastMsg = '';
// Now announce the content of a string
$A.announce(lastIncomingMsg, true);
-
String.announce.baseDelay
-
The "String.announce.baseDelay" property determines the initial delay in milliseconds when the "$A.announce()" method queues messages to be announced sequentially.
-
Default: 2000
Syntax
String.announce.baseDelay = 1500;
-
String.announce.charMultiplier
-
The "String.announce.charMultiplier" property determines the delay in milliseconds when a message using "$A.announce()" contains two or more words including punctuation.
-
Default: 160
Syntax
String.announce.charMultiplier = 150;
-
String.announce.clear()
-
The "String.announce.clear()" method clears the message stack of all queued message strings waiting to be announced.
-
Syntax
String.announce.clear();


About this site
Welcome to the RikiTraki GPS track sharing site.
Use the slippy map to explore our outdoor experiences and learn more about their locations. Tracks, markers and photos
are clickable. The controls at the top left part of the map provide for zooming, base map and layer display control. The control at the bottom left
is an interactive elevation profile widget. The track label at the top right provides track information and a slide show (if pictures are available.)
You are welcome to register if you wish to upload and share your own tracks on this site.
This is a work in progress, currently in Beta. Please report bugs and omissions. We are continually testing and enhancing this application over time.
To learn more about this and other projects, head over to the
blog.
Feedback and questions are greatly appreciated
Geek info...
Building blocks
This project uses free and open source components and data as shown below. You are welcome to
fork it and contribute to its development.
Core mapping framework:
- The powerful Leaflet Javascript library for projection maps
- The amazing Cesium Javascript library for globe and 3D mapping
Components and plugins:
Base maps:
Some sign images:
Server side:


FE:A Inheritance
- {{character.name}}
Details and directions
This web app was created as an enhancement to the inheritance guide at Serenes Forest, a fanpage for Fire Emblem: Awakening. For detailed explanation of the inheritance mechanics and other info about the game, please visit the link.
To get going, simply click on the parent whose marriages you would like to view. Each valid spouse will be listed, along with details about the child the marriage produces. He or she gains access to all of the listed class trees except for any restricted classes, listed in grayed-out font. The child may inherit one skill from a restricted class from each parent.
Maximum stat modifiers (mods) are also shown, just above the classes. Clicking on the name of an available class will highlight all occurences of the selected class on the page. Furthermore, the mods section will display the maximum stats achievable when using the class, for each applicable child.
-
{{spouse.name}}
{{mods() | labeled}}{{child.parent.name + ' (' + child.name + ')'}}
{{parent.child && spouse.name || parent.name}}
(Nothing)


EFCC not tool for witch-hunt, says Magu - The Nation Newspaper
Yinka Adeniran, Ibadan
ACTING Chairman of the Economic and Financial Crimes Commission (EFCC), Mr Ibrahim Magu has reiterated the agency’s commitment to respect for human rights.
He said in the agency’s constitutional mandate of waging war against corruption, it does not target any particular individual or group of people.
Magu spoke yesterday in Ibadan, the Oyo State capital, while featuring as a discussant at the state chapter of Human Rights Stakeholders’ Summit of the National Human Rights Commission (NHRC).
The anti-graft chief was represented by the Head of EFCC’s Ibadan zonal office, Friday Ebelo.
According to him, the anti-graft agency always does its best in handling its suspects with dignity and respect to avoid infringing on their rights.
“There is nothing like ‘We Against Them’ in our effort to rid our nation of economic and financial crimes. We take issues of human rights seriously and we always do our best to respect the legitimate rights of our suspects,” he said.


The Parent Trap (1998)
A Film Review by Mark O'Hara
It's been too long since I've seen the original 1961 THE PARENT TRAP to make comparisons. Let it be enough to say that I watched the remake with four boys, ages 11-13, and not one of them griped that it was corny or a "chick flick."
First-time director Nancy Meyers summons first-rate performances from most of the cast. Lindsay Lohan stands out in the role of twins Hallie Parker, the Napa Valley native who loves her single father, and Annie James, the skillfully accented Londoner who meets her sister at summer camp. It must have taken planning and patience to keep the girls' manners straight and separate - not to mention to shoot around a stand-in; the result is seamless and uncanny. There's even a scene in which the girls play poker, one of them - we think the stand-in - holding her face away from the camera. But suddenly she turns and we see Lohan again. In fact there are very few scenes, in which the girls appear together, that have not been carefully executed. As an actress, Lohan is poised and confident, and her red hair and freckles make viewers forget Hayley Mills.
Much of the lightness of tone - and it is a welcome lightness - comes from Simon Kunz's portrayal of Annie's butler. At once a father figure and fun-loving pal, the loyal Martin gets many of the laughs in the picture. And he comes by them honestly; it does not even seem cheap when he dresses in leather or in nothing but a Speedo. Martin is not afraid to cry, and meets a sympathetic counterpart in Chessy (Lisa Ann Walter), employee of Nick Parker (Dennis Quaid) and nanny to Hallie. A budding romance between the servants actually adds charm to the film, though the idea of it sounds sappy and cliched. As the twins' father, Quaid turns in a solid but not an outstanding job. Natasha Richardson is a bit more flamboyant, especially in scenes that have her straight-laced Elizabeth swallowing too much airline booze. No, along with the dual main role, it is the supporting roles of the servants, along with a little help from Elaine Hendrix as gold-digging Meredith, that propels the story into an above-average film.
Pace is very important in this film, especially since Meyers and co-writer Charles Shyer avoid fart jokes and crotch kicks. The slapstick humor at camp comes across well, and the very premise of the girls switching roles so that their parents would be forced to see each other lends unity of plot. Once again the acting makes for some touching reunions, with each 11 year-old never having seen one parent. I think what moves the story along so quickly is the editing. The scenes are only as long as they need to be, no fillers stretching them out. For instance, Annie and Hallie offer each other extensive coaching: each must duplicate the other's knowledge and lifestyle. These scenes are properly summarized.
On the whole, THE PARENT TRAP appeals to such a wide audience - including adolescent boys - because it tells a story of human triumph. It is also intelligent and innocent, a double threat to most movies that ooze or explode out of the huge conglomerates that happen to own studios.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


Javascript Quiz!
learn_js_in_seattle
Answer 1
Answer 2
Answer 3
Answer 4
Please choose an answer first.
Submit answer


Tracking common user interactions
Event Measurement
Social Interactions
App / Screen Measurement
User Timings
Exceptions Tracking
Ecommerce plugin
Measuring a Product Impression
Measuring a Product Click
Measuring a Product Details View
Measuring an Addition to Cart
Measuring a Removal from Cart
Measuring Checkout Process (Payment)
Measuring Checkout Process (Shipping)
Measuring a Transaction
Measuring a Refund
Measuring a Partial Refund
Measure Promotion Impressions
Measure Promotion Clicks


EXTIBAX
Routine
Do List
Date Counter
Hey you! Be Programmer!
Routine
Bootstrap
Course
Go!
PHP
Course
Go!


<f:facet/>
The facet is rendered inside the <ezcomp:myComp/>
composite component where the <cc:renderFacet name="content"/>
is placed.
This example displays a list of names which are clickable links. The link will make an AJAX call, and if successful, will return a status code of 200 along with a message.


{% extends 'base.html' %} {% block content %} {{super()}}
We support Markdown syntax for fancy formatting of your entries that still looks good as raw text!


This website talks about drugs and also states of mind, caused by either chemicals entering the brain and doing their thing or by natural things such as meditation. Well I am bipolar, which was called 'manic-depressive disorder' which means I have manic episodes and depressive episodes. Mania, to me, can be described as the ultimate 'natural high'. Less stronger than cocaine, much more stronger than caffeine. I will attempt to explaine my mental state, emotions, thoughts, actions, etc. etc. so you can dive into my gift and curse of bipolar.
+Mania+
Onset-
Probably the best part of mania. What I normally begin to feel is
Mood Lift
Excessive Self Esteem
Energy
Creative Thought
Spending Sprees
and even a decent degree of Euphoria.
I become talkative, cocky, erotic, I tend to smile alot, I can sleep for 3 hours and feel completely rested, basically I feel supreme.
Day 2
After a night time sleep at 3am, waking up at 6am and feeling like a morning bird, going outside to see the beautiful Arizona sunrise during spring brings even more moodlift. I become task oriented, thinking of nothing but achieving my goal, I even help my dad changing the tires which he had to take a break and I continued on uninterupted. Visual flow of artistic ideation is swirling in my head, I usually draw a scale with all my manic feelings on the right side, weighing down the right side of the scale. To me that represents my skewed emotional balance.
Day 3
I don't get any sleep, I go on shopping sprees, buying hats, shirts, pants, candy, games, flowers, markers... Buying something always makes me feel good during mania.
Day 4
Usually everything becomes less fun, I become irritable, inattentive, like if I have adhd. This is when mania takes its toll
Day 5
I'm coming down, this is when I usually start feeling tired and depressed. My depression can be more accuratetly desribed as apathetic.  This is usually the end of the manic ride and I go into the depressed state.
-Depression-
Onset
After becoming exhausted I begin to feel sort of neutral to apathy. I basically have somnolence throughout the day. I feel
Fatigue
Apathy
Forgetfullness
Irritable
Gloomy
Everything seems darker..
Day 2
Apathy then transforms into guilt and worthlessness. Suicidal ideation begins to creep into my thoughts. In this point in stage I think 'what would happen If I shoot myself' but I rarely attempt suicides on Day 2, if ever.
Day 3-Day 6
Depression always lasts longer in bipolar, I feel like shit, tired, basic feelings of depression
Day 7 and plus
I never know how long this state will last but it usually lasts for 2 weeks where I just have suicidal ideation and such.
-Neutral+
Onset
Depression slowly fades away into what I perceive as 'normal'. I can never fully understand what 'normal' is but I know just what it feels like, or what I would think it is.
I decided to share this because bipolar, to me, is both a gift and a curse that about 3% of the american population is affected by. This place is meant for Mind and Body, drugs or not, but anyways I hope this gives you an understanding to the simple but complex mind of the human being.
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.


Status:
Status
Chat
Gold Coast
From: Greg James
-
Joe Akin Sure 8pm02 Feb 5
-
Rachael Early prototype of product02 Feb 1
-
Greg James Welcome30 Jun
-
Segun Obe Sure 8pm01 Feb
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Introduction
This is documentation for controlling a behavioral experiment using an Arduino microcontroller using Python. The experiment can be controlled from a Python command line or with an easy to use web browser interface. Included in this system is an option to simultaneously record video using a Rapsberry Pi video camera. Our goal is to provide a starting point for open-source behavioral experiments that can be extended to new experimental designs.
Figure 1. Web-browser interface.
The top section provides an interface to start/stop a trial and plots real-time feedback as the trial is running.
The Stimulus section provides an interface to set stimulus parameters and to upload these parameters to an Arduino. This section also provides a plot of the stimulus waveform based on the current set of parameters.
System design
The core system consists of an Arduino, a stepper motor and motor driver, and a rotary encoder. The system comes together with a circular treadmill that can be driven by the stepper motor and whos current position is read using the rotary encoder.
The Arduino can be controlled with serial commands and can be triggered with general purpose digital input-output (GPIO) pulses. By relying on serial commands and GPIO pulses, this system is not dependent on the details of other pieces of equipment already in place for an experiment and can be extended to new and unique experimental configurations.
Using the provided Python code, an experiment can be controlled from a Python command prompt or a web browser interface.
Optionally, if this code is run on a Raspberry Pi, we provide Python code to simultaneously trigger and time-stamp video recording during an experiment. Please see our Trigger Camera documentation for a full dscription of how to integrate video recording into this system
We are routinely using this treadmill and video aquisition system while simultaneously acquiring in vivo two-photon images using ScanImage software (in Matlab) with National Instruments data acquisition cards.
See the parts list for a full list of parts, prices, and links to buy online.
Arduino
The majority of Arduino compatible micro-controllers will work with the code provided. We suggest starting with an Arduino Uno. An good alternative Arduino compatible microcontroller is the Teensy. The Teensy is advantageous as it has a more powerful processor, provides more low level interrupts, and has more memory than an Arduino Uno.
Raspberry Pi
The Raspberry Pi is a fully functional credit-card sized computer that runs Linux. It comes with USB, Ethernet, Wifi, and HDMI ports. It can be used as a host computer to program an Arduino using the Arduino IDE and can easily run Python code. A unique feature of the Pi is that it has built in digital GPIO. Thus, a Raspberry Pi can send/receive GPIO signals to/from most laboratory equipment including an Arduino. The Pi can be equipped with a dedicated video camera (5MP or 8MP) that can be controlled from Python and can be (relatively) precisely triggered by GPIO pulses. Given its small footprint, a Raspberry Pi is easily integrated into the same electronics box as the Arduino.
Please note, the GPIO ports on the Rapsberry Pi are only 3.5V tolerant while most laboratory equipment (including many Arduinos and National Instruments boards) use 5V GPIO. Thus, a logic-level converter is needed to convert between 3.5V on the Pi to 5V on other equipment.
As the Raspberry Pi is running a full Linux operating system, the precision and reliability of the GPIO pins is lower than can be achieved using a dedicated microcontroller like an Arduino. Thus, we have built this system using a Teensy microcontroller as a 'pass through' device to record the precise timing of experimental events to then be compared to and to calibrate the performance of the Raspberry Pi.
Wiring the system
- Wire the stepper motor to the motor driver
- Wire the Arduino to the motor driver
- Wire the rotary encoder to the Arduino
- Wire the Arduino to existing lab equipment
- Wire the Raspberry Pi to the Arduino.
Here, we are wiring the system to interact with ScanImage software via National Instruments DAQ boards. This can easily be modified by wiring the system to other in-place acquisition systems such as those from Scientifica, Bruger (Prarie), Zeiss, or Nikon.
Keep in mind, the Raspberry Pi GPIO pins are not 5V tolerant. Use a 5V to 3.5V level shifter to wire the Raspberry Pi to 5V GPIO signals. A Teensy microcontroller is advantageous in that it will accept 5V GPIO input but only outputs 3.5V GPIO. Thus, a Teensy and Raspberry Pi GPIO pins can be directly wired without a level shifter.
Treadmill
See the images page and the treadmill section of the parts list.
Building the treamill is easy but finding the pieces to build with can be time-consuming and frustrating. A good starting point is to use Actobotics parts from ServoCity or Sparkfun. In particular, ServoCity, has made a useful set of visual guides and project ideas that are really helpful in designing hardware components. Structural components include: frames, rods, bearings, clamps, and motor mounts.
Upload code to the Arduino
The source code for the Arduino can be found in /arduino/src/treadmill.cpp.
Required libraries
Non-blocking Arduino libraries need to be used, otherwise the system will not perform well. Without non-blocking libraries, the code to turn the stepper motor will block other code like reading the rotary encoder and vica versa. Using these non-blocking libraries ensures that (but do not gaurantee) the stepper motor movement does not stutter and all the rotary encoder positions are logged.
- AccelStepper library to control stepper motor
- Rotary encoder library from PJRC
Arduino IDE
Use the standard Arduino IDE to upload treadmill.cpp to an Arduino. Make sure the required Arduino libraries are installed. Be sure to activate additional low level interrupts if using an Arduino Uno.
Platformio
Code can also be uploaded to an Arduino using PlatformIo. This has the distinct advantage that code can be compiled and uploaded from the command line on a headless computer including a Raspberry Pi. Please see this blog post to Install PlatformIO, compile code and upload it to an Arduino.
Low Level Interrupts
The Arduino Uno only comes with two pins (2 and 3) capable of low-level interrupts and more pins need to be enabled. Two low level interrupts are needed for the Rotary Encoder, another for a GPIO trigger, and another for GPIO pulses coming from a frame clock. See Pin-change interrupts for information on exposing additional pins as low-level interrupts.
We have included a compiler directive _expose_interrupts_
in the treadmill.cpp Arduino code that, if activated, will run code to expose the needed interrupts on an Arduino Uno.
- If using PlatformIO, this is taken care of in the [env] section of platformio.ini
- If using the arduino IDE,
define _expose_interrupts_ = 1
must be included in treadmill.cpp
//Uncomment this line if running on an Arduino Uno and compiling with the arduino IDE
//#define _expose_interrupts_ 1
Python server setup
Download and install Anaconda. Anaconda is a python installation that will install many commonly used libraries. It is much easier to get started with Anaconda rather than a basic installation of Python.
Python libraries
Install additional required python libraries using the included requirements.txt file
pip install -r requirements.txt
Here is the requirements.txt file
eventlet>=0.18.4
Flask>=0.10.1
Flask-Markdown>=0.3
Flask-SocketIO>=1.0
platformio>=2.8.5
plotly>=1.9.6
pyserial>=3.0.1
Required python libraries on Raspberry Pi
pip install -r raspberry_requirements.txt
picamera
RPi.GPIO
Running an experiment
At its core, an experiment is run on an Arduino by interacting with treadmill.cpp through a serial port interface. In addition, a Python command line interface and a web based interface are provided.
These interfaces can be extended by directly interacting with the Arduino code in treadmill.cpp (with serial commands), the python code in treadmill.py, or the web server code in treadmill_app.py.
Arduino serial interface
The Arduino code treadmill.cpp provides a set of serial port commands to get/set parameters and start/stop a trial. Once the code is uploaded to an Arduino, any serial port interface will allow control of an experiment as follows.
startTrial # start a trial
stopTrial # stop a trial
getState #
settrial,[name],[value]
settrial
takes the name
and value
of a trial parameter to set. The name
needs to be one of: numPulse, numEpoch, epochDur, preDur, etc. These names match the 'Stimulus' parameters provided in the web interface. See the SetTrial() function in treadmill.cpp for all possible trial parameters.
Entering getState
in a serial port interface and the Arduino will return the current values for all trial parameters. This is a good way to find the names of trial parameters and then set them. For example, settrial,epochDur,5000
.
=== Arduino State ===
trialNumber=0
trialDur=1000
numEpoch=1
epochDur=1000
preDur=1000
postDur=1000
numPulse=3
pulseDur=1000
useMotor=1
motorDel=200
motorDur=200
motorSpeed=0
motorMaxSpeed=0
versionStr=20160322
=== Done ===
Python interface
An experiment can be controlled from within Python by interacting with treadmill.py. This includes interaction from a Python command line interface, a iPython/Jupyter interface, or custom written Python scripts. The Python interface and Arduino interface share all trial parameter names.
Here is an example of running an experiment from a Python script.
import treadmill
t = treadmill.treadmill() # create a treadmill object
t.startTrial() # start a new trial
t.stopTrial() # stop a trial
t.GetArduinoState() # get the current state with all trial parameters (see Arduino getstate serial command).
t.settrial('epochDur',5000) # set the value of 'epochDur' trial parameter to 5000 ms
t.startTrial() # start a new trial
Web interface
An experiment can also be controlled through a web browser interface. Run the web interface with python treadmill_app.py
. The code for this web interface, in treadmill_app.py, uses the Flask Python library. Flask is a micro-framework that allows a web-server to be created and controlled all from within Python. To make the web client interactive, we use SocketIO to communicate between the web client and the Flask python server.
Configuring the web interface
Change the default IP address and port of the web server in treadmill_app.py.
-
To run the web server on the machines local network IP, port 5010
socketio.run(app, host='<IP_ADDRESS>', port=5010, use_reloader=True)
-
To run the web server on localhost <IP_ADDRESS>:5010, use this if using a single machine (no LAN needed)
socketio.run(app, host='', port=5010, use_reloader=True)
Client side
The web interface is using a number of client and server libraries. See index.html and analysis2.html for client-side code.
- Socket-io allows the Flask server to push updates to web-page without reloading the page
- Bootstrap for page layout, buttons, sliders, value display
- jquery to handle logic of user interface
- plotly.js to plot the arduino stimulus
- highcharts.js to plot a trial in real-time while it is running
- jqgrid to display a table of trials from disk
Conlusion
We have provided a description of all the pieces necessary to construct a system to control an experiment using an Arduino from Python. By creating this system with open-source hardware and software, our aim is to lower the barrier of entry to get started with implementing custom built experiments.


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Petar Mihaylov
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Resume | RepositoryPetar Mihaylov
Smyrna, GA
Current Engagements
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