Tutorial by Examples: p

The method nextInt(int bound) of Random accepts an upper exclusive boundary, i.e. a number that the returned random value must be less than. However, only the nextInt method accepts a bound; nextLong, nextDouble etc. do not. Random random = new Random(); random.nextInt(1000); // 0 - 999 int num...

NSArray *array = [NSArray arrayWithObjects:@"Nick", @"Ben", @"Adam", @"Melissa", nil]; NSPredicate *aPredicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'a'"]; NSArray *beginWithA = [array filteredArrayUsingPredicate:bPredicate]; ...

Getting ("a", 1) ^. _1 -- returns "a" ("a", 1) ^. _2 -- returns 1 Setting ("a", 1) & _1 .~ "b" -- returns ("b", 1) Modifying ("a", 1) & _2 %~ (+1) -- returns ("a", 2) both Traversal (1, 2) & bot...

1. Install the Ionic Framework and Cordova (since Ionic apps are based on Cordova) using npm (the Node Package Manager): Make sure you have an up-to-date version of Node.js installed on your system. If you don't have Node.js installed, you can install it from here. Also, for Mac users, having the ...

First of all, implement your view holder: implements View.OnClickListener, View.OnLongClickListener Then, register the listeners as follows: itemView.setOnClickListener(this); itemView.setOnLongClickListener(this); Next, override the listeners as follows: @Override public void onClick(Vie...

Properties are members of an object. Each named property is a pair of (name, descriptor). The name is a string that allows access (using the dot notation object.propertyName or the square brackets notation object['propertyName']). The descriptor is a record of fields defining the bevahiour of the pr...

By default error message appears below textbox in <div class="help-block"></div> on keyUp or after pressing submit button if any validation constraints aren't met. Sometimes we want a message on submit only i.e. no validation at onKeyup event. Let's check yii2/widgets/ActiveF...

Binary releases of Maven can be downloaded from the Maven website. The binary comes as a zip archive or as a tar.gz archive. After downloading it, the instructions from the install page can be followed: Ensure the JAVA_HOME environment variable is set and points to your JDK installation (not JRE...

An interface in Kotlin can have default implementations for functions: interface MyInterface { fun withImplementation() { print("withImplementation() was called") } } Classes implementing such interfaces will be able to use those functions without reimplementing cl...

Download Qt for Linux Open Source Version Go to https://www.qt.io/download-open-source/ and click on Download Now, make sure that you are downloading the Qt installer for Linux. A file with the name qt-unified-linux-x-online.run will be downloaded, then add exec permission chmod +x qt-unified-...

The Stop command will pause the execution when called. From there, the process can be resumed or be executed step by step. Sub Test() Dim TestVar as String TestVar = "Hello World" Stop 'Sub will be executed to this point and then wait for the user Ms...

Different flavors of application builds can contain different resources. To create a flavor-specific resource make a directory with the lower-case name of your flavor in the src directory and add your resources in the same way you would normally. For example, if you had a flavour Development and w...

The easiest way to get writing your first XAML is to install Microsoft Visual Studio. This is avaliable free from Microsoft. Once installed you can create a new project, of type WPF Application, either with a VB.NET or C# code. This is similar to windows forms in the sense that you have a series o...

Fortran is a language which can be compiled using compilers supplied by many vendors. Different compilers are available for different hardware platforms and operating systems. Some compilers are free software, some can be used free of charge and some require the purchase of a licence. The most comm...

INSERT INTO `my_table` (`field_1`, `field_2`) VALUES ('data_1', 'data_2'), ('data_1', 'data_3'), ('data_4', 'data_5'); This is an easy way to add several rows at once with one INSERT statement. This kind of 'batch' insert is much faster than inserting rows one by one. Typically...

Starting with PHP Sessions we can pass an array with session-based php.ini options to the session_start function. Example <?php if (version_compare(PHP_VERSION, '7.0.0') >= 0) { // php >= 7 version session_start([ 'cache_limiter' => 'private', ...

Getting started with Ember is easy. Ember projects are created and managed through our command line build tool Ember CLI. This tool provides: Modern application asset management (including concatenation, minification, and versioning). Generators to help create components, routes, and more. A ...

Symfony Framework - built with symfony components, is one of the leading PHP framework used to create robust websites and web applications. Symfony can be installed quickly through two recommended ways. The official documentaion recommends to install the framework through the Symfony Installer ...

Pseudo-elements are added to selectors but instead of describing a special state, they allow you to style certain parts of a document. The content attribute is required for pseudo-elements to render; however, the attribute can have an empty value (e.g. content: ""). div::after { conte...

Detailed instructions on getting unix set up or installed.