Tutorial by Topics

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 ...

D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization co...

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

Vim (or "Vi IMproved") is a console-based multi-mode (modal) text editor. It is widely used and available by default on all Unix, Linux, and Apple OS X systems. Vim has a large active community and a wide user base. The editor supports all popular programming languages, and many plugins ...

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. ...

XML is a markup language used to store hierarchical data in text files. It is also known as semi-structured data, like JSON. XML is machine-readable, yet can also be read and produced by people. XML is made up of elements, sometimes casually referred to as a tag soup, which can themselves contain...

XPath is a language for addressing parts of an XML document. It is used in XSLT and is a subset of XQuery. Libraries are available for most other programming languages as well. XPath is an international standard with specifications published by W3C: XPath 1.0: XML Path Language (XPath), Vers...

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...

Highcharts is a JavaScript charting library that can be set up using options in JSON-format. It supports a wide range of chart types by default, and also allows for plugins. It is also the core for several side products like Highstock and Highmaps. Highcharts is free for non-commercial and person...

JavaFX is a software platform for creating and delivering desktop applications, as well as rich internet applications (RIAs) that can run across a wide variety of devices. JavaFX is intended to replace Swing as the standard GUI library for Java SE. IT enables developers to design, create, test, d...

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.

Lens is a library for Haskell that provides lenses, isomorphisms, folds, traversals, getters and setters, which exposes a uniform interface for querying and manipulating arbitrary structures, not unlike Java's accessor and mutator concepts. What is a Lens? Lenses (and other optics) allow us...

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...

Gradle is an open-source, general-purpose build tool. It is popular in the Java community and is the preferred build tool for Android. Highlighted Gradle features Declarative build scripts are code written in Groovy or Kotlin. Lots of core and community plugins which use a flexible, convent...