Tutorial by Topics: o

uname - to print information about your operating system. uname [OPTION]

:symbol :'symbol' :"symbol" "symbol".to_sym %s{symbol} Advantages of using symbols over strings: 1. A Ruby symbol is an object with O(1) comparison To compare two strings, we potentially need to look at every character. For two strings of length N, this will requir...

A UIAlertController object displays an alert message to the user. This class replaces the UIActionSheet and UIAlertView classes for displaying alerts. After configuring the alert controller with the actions and style you want, present it using the presentViewController:animated:completion: ...

@{ key: value, ... } [NSDictionary dictionaryWithObjectsAndKeys: value, key, ..., nil]; dict[key] = value; id value = dict[key]; The NSDictionary class declares the programmatic interface to objects that manage immutable associations of keys and values. Use this class or ...

Overview matplotlib is a plotting library for Python. It provides object-oriented APIs for embedding plots into applications. It is similar to MATLAB in capacity and syntax. It was originally written by J.D.Hunter and is actively being developed. It is distributed under a BSD-Style License. ...

Apache Cordova is used to create Mobile apps with HTML, CSS & JS. Apache Cordova targets multiple platforms with one code base. Apache Cordova is Free and open source. Cordova wraps your HTML/JavaScript app into a native container which can access the device functions of several platforms. ...

This section provides an overview of what postgresql is, and why a developer might want to use it. It should also mention any large subjects within postgresql, and link out to the related topics. Since the Documentation for postgresql is new, you may need to create initial versions of those rela...

In the basic case, a model is Python class that maps to a single database table. The attributes of the class map to columns in the table and an instance of the class represents a row in database table. The models inherit from django.db.models.Model which provides a rich API for adding and filtering ...

JSON (JavaScript Object Notation) is one of the most popular and widely accepted data exchange format originally specified by Douglas Crockford. It is currently described by two competing standards, RFC 71592 and ECMA-404. The ECMA standard is minimal, describing only the allowed grammar syntax, ...

Nothing is really random and thus the javadoc calls those numbers pseudorandom. Those numbers are created with a pseudorandom number generator.

ParameterDetails=For using two-way data binding. This means that if you update that variable in your component scope, the change will be reflected on the parent scope.<One-way bindings when we just want to read a value from a parent scope and not update it.@String parameters.&For callbacks i...

Ionic is a framework for developing mobile applications with HTML, CSS, and JavaScript. Ionic applications run as native applications and have a native "look and feel". Ionic is built on the AngularJS framework and provides a complete solution to design, build, and package mobile applic...

Fortran is a language used extensively in the scientific community due to its suitability for numerical computation. Particularly attractive is its intuitive array notation, which makes writing fast vectorised computations easy. Despite its age, Fortran is still actively developed, with numerous ...

Xamarin.Forms makes it possible to create iOS, Android, and Windows apps with large amounts of shared code, including UI code or XAML UI markup. App pages and views are mapped to native controls on each platform, but can be customized to provide platform-specific UI or to access platform-specific ...

This section provides an overview of what Symfony2 is and why a developer might want to use it. It should also mention any large subjects within Symfony2 and link out to the related topics. Since the Documentation for Symfony2 is new, you may need to create initial versions of those related topic...

Pseudo-elements, just like pseudo-classes, are added to a CSS selectors but instead of describing a special state, they allow you to scope and style certain parts of an html element. For example, the ::first-letter pseudo-element targets only the first letter of a block element specified by the sel...

This section provides an overview of what coldfusion is, and why a developer might want to use it. It should also mention any large subjects within coldfusion, and link out to the related topics. Since the Documentation for coldfusion is new, you may need to create initial versions of those rela...

Recursion occurs when a method calls itself. Such a method is called recursive. A recursive method may be more concise than an equivalent non-recursive approach. However, for deep recursion, sometimes an iterative solution can consume less of a thread's finite stack space. This topic includes examp...