You can tell the compiler the type of a value by annotating it with :Type:
var value:int = 10; // A property "value" of type "int".
Function parameters and return types can also be annotated:
// This function accepts two ints and returns an int.
function sum(a:int, b:int):i...
Unfortunately ActionScript 3 does not have a concept of generics, so it follows that there is no way to define a typed array as Array<T>. There is however a special class Vector.<T> which works in a similar way except you must provide a reference to a concrete class when instantiating th...
The C++ approach - new and delete
In a language like C++, the application program is responsible for managing the memory used by dynamically allocated memory. When an object is created in the C++ heap using the new operator, there needs to be a corresponding use of the delete operator to dispose o...
ga('create', 'UA-XXXX-Y', {'sampleRate': 5});
Optional. This may only be set in the create method.
Specifies what percentage of users should be tracked. This defaults to 100 (no users are sampled out) but large sites may need to use a lower sample rate to stay within Google Analytics processing ...
Before ECMAScript 2015 (ES6), a parameter's default value could be assigned in the following way:
function printMsg(msg) {
msg = typeof msg !== 'undefined' ? // if a value was provided
msg : // then, use that value in the reassignemnt
'Default value for ...
Sometimes we need to change type from Collection<T?> to Collections<T>. In that case, filterNotNull is our solution.
val a: List<Int?> = listOf(1, 2, 3, null)
val b: List<Int> = a.filterNotNull()
3
You can use rem defined by the font-size of your html tag to style elements by setting their font-size to a value of rem and use em inside the element to create elements that scale with your global font-size.
HTML:
<input type="button" value="Button">
<input type=...
localStorage.length property returns an integer number indicating the number of elements in the localStorage
Example:
Set Items
localStorage.setItem('StackOverflow', 'Documentation');
localStorage.setItem('font', 'Helvetica');
localStorage.setItem('image', 'sprite.svg');
Get length
localSto...
Holy Grail layout is a layout with a fixed height header and footer, and a center with 3 columns. The 3 columns include a fixed width sidenav, a fluid center, and a column for other content like ads (the fluid center appears first in the markup). CSS Flexbox can be used to achieve this with a very s...
This is a minimalist Hello World example that uses only the most basic Android tools.
Requirements and assumptions
Oracle JDK 1.7 or later
Android SDK Tools (just the command line tools)
This example assumes Linux. You may have to adjust the syntax for your own platform.
Setting up the And...
A simple example on how to read a UTF text file synchronously.
import flash.filesystem.File;
import flash.filesystem.FileMode;
import flash.filesystem.FileStream;
//First, get a reference to the file you want to load
var myFile:File = File.documentsDirectory.resolvePath("lifestory.txt&...
Declare the AppWidgetProvider class in your application's AndroidManifest.xml file. For example:
<receiver android:name="ExampleAppWidgetProvider" >
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>...
The most important AppWidgetProvider callback is onUpdate(). It is called everytime an appwidget is added.
public class ExampleAppWidgetProvider extends AppWidgetProvider {
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
final int N = a...
String concatenation is done simply by writing expressions next to one another without any operator. For example:
BEGIN {
user = "root"
print "Hello "user "!"
}
will print: Hello root!
Note that expressions do not have to be separated by whitespace.
Nine-patch images allow optional definition of the padding lines in the image. The padding lines are the lines on the right and at the bottom.
If a View sets the 9-patch image as its background, the padding lines are used to define the space for the View's content (e.g. the text input in an EditTex...
This is MATLAB's long-winded way of saying that it cannot find the function that you're trying to call. There are a number of reasons you could get this error:
That function was introduced after your current version of MATLAB
The MATLAB online documentation provides a very nice feature which allow...
This example uses a search controller to filter the data inside a table view controller. The search bar is placed inside the navigation bar that the table view is embedded into.
Embed a UITableViewController into a UINavigationController to get the UINavigationItem (which contains the navigation ...
This example uses a search controller to filter the cells in a table view controller. The search bar is placed inside the header view of the table view. The table view content is offset with the same height as the search bar so that the search bar is hidden at first. Upon scrolling up past the top e...
