Tutorial by Topics: di

Installing Binaries for StackExchange.Redis are available on Nuget, and the source is available on Github. Common Tasks Profiling VersionRelease Date1.0.1872014-03-18

X?.Y; //null if X is null else X.Y X?.Y?.Z; //null if X is null or Y is null else X.Y.Z X?[index]; //null if X is null else X[index] X?.ValueMethod(); //null if X is null else the result of X.ValueMethod(); X?.VoidMethod(); //do nothing if X is null else call X.VoidMethod(); Note that w...

A thread is a part of a program that can execute independently of other parts. It can perform tasks simultaneously with other threads. Multithreading is a feature that enables programs to perform concurrent processing so that more than one operation can be done at a time. For example, you can use...

The using keyword is both a directive (this topic) and a statement. For the using statement (i.e. to encapsulate the scope of an IDisposable object, ensuring that outside of that scope the object becomes cleanly disposed) please see Using Statement.

Setup Before using data binding, you must enable the plugin in your build.gradle. android { .... dataBinding { enabled = true } } Note: Data binding was added to the Android Gradle plugin in version 1.5.0 Binding class names The data binding plugin generates a bind...

Note that a ViewTreeObserver instance associated with a View instance can become invalid while that View is still alive. From the View.getViewTreeObserver javadocs: // The returned ViewTreeObserver observer is not guaranteed to remain // valid for the lifetime of this View. If the caller of this...

Instead of using the javax.sound.sampled Clip, you can also use the AudioClip which is from the applet API. It is however recommended to use Clip since AudioClip is just older and presents limited functionalities.

As of Java 8, Calendar and its subclasses have been superseded by the java.time package and its subpackages. They should be preferred, unless a legacy API requires Calendar.

RMI requires 3 components: client, server and a shared remote interface. The shared remote interface defines the client-server contract by specifying the methods a server must implement. The interface must be visible to the server so that it can implement the methods; the interface must be visible...

The java.util.Iterator is the standard Java SE interface for object that implement the Iterator design pattern. The java.lang.Iterable interface is for objects that can provide an iterator. It is possible to iterate over an array using the for-each loop, though java arrays do not implement Iterab...

Conditional expressions, involving keywords such as if and else, provide JavaScript programs with the ability to perform different actions depending on a Boolean condition: true or false. This section covers the use of JavaScript conditionals, Boolean logic, and ternary statements. if (conditi...

NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions) // Returns an Object from jsonData. This method throws on failure. NSJSONSerialization.dataWithJSONObject(jsonObject, options: NSJSONWritingOptions) // Returns NSData from a JSON object. Pass in NSJSONWritingOptions....

HTML provides not only plain paragraph tags, but six separate header tags to indicate headings of various sizes and thicknesses. Enumerated as heading 1 through heading 6, heading 1 has the largest and thickest text while heading 6 is the smallest and thinnest, down to the paragraph level. This topi...

global a, b, c nonlocal a, b x = something # binds x (x, y) = something # binds x and y x += something # binds x. Similarly for all other "op=" del x # binds x for x in something: # binds x with something as x: # binds x except Exception as ex: # binds ex inside block ...

git diff [options] [<commit>] [--] [<path>…​] git diff [options] --cached [<commit>] [--] [<path>…​] git diff [options] <commit> <commit> [--] [<path>…​] git diff [options] <blob> <blob> git diff [options] [--no-index] [--] <path> &l...

Some examples in this topic might have a different order when used because dictionary order is not guaranteed.

@media [not|only] mediatype and (media feature) { /* CSS rules to apply */ } ParameterDetailsmediatype(Optional) This is the type of media. Could be anything in the range of all to screen.not(Optional) Doesn't apply the CSS for this particular media type and applies for everything else.media...