package {
import flash.display.Sprite;
import flash.events.Event;
public class Viewport extends Sprite {
/** Constructor */
public function Viewport() {
super();
// Listen for added to stage event
addEventListener(Event.ADDED_TO_STAGE, addedToStageHandle...
The web.config system.web.httpRuntime must target 4.5 to ensure the thread will renter the request context before resuming your async method.
<httpRuntime targetFramework="4.5" />
Async and await have undefined behavior on ASP.NET prior to 4.5. Async / await will resume on an arb...
If you want two or more arguments to be mutually exclusive. You can use the function argparse.ArgumentParser.add_mutually_exclusive_group(). In the example below, either foo or bar can exist but not both at the same time.
import argparse
parser = argparse.ArgumentParser()
group = parser.add_mut...
Only when the foreach statement moves to the next item does the iterator block evaluate up to the next yield statement.
Consider the following example:
private IEnumerable<int> Integers()
{
var i = 0;
while(true)
{
Console.WriteLine("Inside iterator: " + i...
In Python 3 the cmp built-in function was removed, together with the __cmp__ special method.
From the documentation:
The cmp() function should be treated as gone, and the __cmp__() special method is no longer supported. Use __lt__() for sorting, __eq__() with __hash__(), and other rich compariso...
There are two operators for filtering duplicates:
emails.Distinct(); // Never see the same value twice
emails.DistinctUntilChanged(); // Never see the same value twice in a row
You can also pass in a predicate:
emails.DistinctUntilChanged(x => x.Length); // Never see the same length email t...
In order to define a variable inside a linq expression, you can use the let keyword. This is usually done in order to store the results of intermediate sub-queries, for example:
int[] numbers = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
var aboveAverages = from number in numbers
l...
The dexcount plugin counts methods and class resource count after a successful build.
Add the plugin in the app/build.gradle:
apply plugin: 'com.android.application'
buildscript {
repositories {
mavenCentral() // or jcenter()
}
dependencies {
classpath 'com.ge...
C++11 introduced final specifier which forbids method overriding if appeared in method signature:
class Base {
public:
virtual void foo() {
std::cout << "Base::Foo\n";
}
};
class Derived1 : public Base {
public:
// Overriding Base::foo
void foo() f...
Html5-Canvas ...
Is an Html5 element.
Is supported in most modern browsers (Internet Explorer 9+).
Is a visible element that is transparent by default
Has a default width of 300px and a default height of 150px.
Requires JavaScript because all content must be programmatically added to the Canv...
The URLVariables class allows you to define data to be sent along with a URLRequest.
Example:
var variables:URLVariables = new URLVariables();
variables.prop = "hello";
variables.anotherProp = 10;
var request:URLRequest = new URLRequest('http://someservice.com');
request.data = v...
Assuming we have an array myArray:
var value:* = myArray[int(Math.random() * myArray.length)];
Note we use int to cast the result of Math.random() to an int because values like 2.4539543 would not be a valid array index.
This is the built-in way to deal with "exceptions" without relying on third party libraries like Try::Tiny.
my $ret;
eval {
$ret = some_function_that_might_die();
1;
} or do {
my $eval_error = $@ || "Zombie error!";
handle_error($eval_error);
};
# use $ret
...
