Tutorial by Examples: l

To check for location services we need real device but for testing purpose we can also use simulator and add our own location by following below steps: add new GPX file into your project. in GPX file add waypoints like <?xml version="1.0"?> <gpx version="1.1" cre...

private List<FooBar> _fooBars; public List<FooBar> FooBars { get { return _fooBars ?? (_fooBars = new List<FooBar>()); } } The first time the property .FooBars is accessed the _fooBars variable will evaluate as null, thus falling through to the assignment statement ass...

Noting that zip transposes a tuple of lists into a list of tuples, ghci> uncurry zip ([1,2],[3,4]) [(1,3), (2,4)] and the similarity between the types of transpose and sequenceA, -- transpose exchanges the inner list with the outer list -- +---+-->--+-+ -- | | ...

git clean -f Will remove all untracked files.

If you need to download files with git under a proxy, setting proxy server system-wide couldn't be enough. You could also try the following: git config --global http.proxy http://<proxy-server>:<port>/

Introduction Play has several plugins for different IDE-s. The eclipse plugin allows to transform a Play application into a working eclipse project with the command activator eclipse. Eclipse plugin may be set per project or globally per sbt user. It depends on team work, which approach should be u...

New build systems can be created from the menu (Tools | Build System | New Build System). { "shell_cmd": "somecommand -u \"$file\"", "result_file_regex": "^[ ]*File \"(.*?)\"", "result_line_regex": "^[ ]*File ...

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:wq!

C++11 The alignas keyword can be used to force a variable, class data member, declaration or definition of a class, or declaration or definition of an enum, to have a particular alignment, if supported. It comes in two forms: alignas(x), where x is a constant expression, gives the entity the ali...

When creating the project You should check "Include Unit Tests" in the project creation dialog. After creating the project If you missed checking that item while creating your project, you could always add test files later. To do so: 1- Go to your project settings in Xcode 2- Go to ...

To get started with unit testing, which will be done in the tests file and will be testing the View Controller and Storyboard, we should introduce these two files to the test file. Defining the View Controller Swift var viewController : ViewController! Introducing the Storyboard and initializi...

To stop the Handler from execution remove the callback attached to it using the runnable running inside it: Runnable my_runnable = new Runnable() { @Override public void run() { // your code here } }; public Handler handler = new Handler(); // use 'new Handler(Looper.get...

In order to call a function through a function pointer, the function pointer's type must exactly match the function's type. Otherwise, the behaviour is undefined. Example: int f(); void (*p)() = reinterpret_cast<void(*)()>(f); p(); // undefined

To build up an expression like _ => _.Field == "VALUE" at runtime. Given a predicate _ => _.Field and a string value "VALUE", create an expression that tests whether or not the predicate is true. The expression is suitable for: IQueryable<T>, IEnumerable<T>...

A spannable TextView can be used in Android to highlight a particular portion of text with a different color, style, size, and/or click event in a single TextView widget. Consider that you have defined a TextView as follows: TextView textview=findViewById(R.id.textview); Then you can apply diff...

To get the time at which your app was installed or updated, you should query Android's package manager. try { // Reference to Android's package manager PackageManager packageManager = this.getPackageManager(); // Getting package info of this application PackageInfo info = pack...

Since Yii2 version 2.0.4 there is the EachValidator used to validate each item in an array. [ // ... other rules ['userIDs', 'each', 'rule' => ['integer']], ] The ['integer'] part can be every other validator object that Yii2 offers and can hold the specific arguments for the valid...

Ruby moves up on ancestors chain of an object. This chain can contain both modules and classes. Same rules about moving up the chain apply to modules as well. class Example end module Prepended def initialize *args return super :default if args.empty? super end end module Fi...

This class is called Greeter. Its responsibility is to output a greeting. It has two dependencies. It needs something that will give it the greeting to output, and then it needs a way to output that greeting. Those dependencies are both described as interfaces, IGreetingProvider and IGreetingWriter....