Tutorial by Topics: i

Conditional expressions, involving keywords such as if, else if, and else, provide Swift programs with the ability to perform different actions depending on a Boolean condition: True or False. This section covers the use of Swift conditionals, Boolean logic, and ternary statements. For more in...

Scala has first-class functions. Difference between functions and methods: A function is not a method in Scala: functions are a value, and may be assigned as such. Methods (created using def), on the other hand, must belong to a class, trait or object. Functions are compiled to a class exte...

Not all elements of the XML input will end up as elements of the parsed tree. Currently, this module skips over any XML comments, processing instructions, and document type declarations in the input. Nevertheless, trees built using this module’s API rather than parsing from XML text can have comm...

read.csv(file, header = TRUE, sep = ",", quote = """, dec = ".", fill = TRUE, comment.char = "", ...) read.csv2(file, header = TRUE, sep = ";", quote = """, dec = ",", fill = TRUE, comment.char = "", ....

Express is a minimal and flexible Node.js web application framework, providing a robust set of features for building web applications. The official website of Express is expressjs.com. The source can be found on GitHub. app.get(path [, middleware], callback[, callback...]) app.put(path [, mi...

Python provides both builtin methods and external libraries for creating, modifying, parsing, and manipulating dates and times.

VersionRelease Date0.6.0-dev2017-06-010.5.02016-09-190.4.02015-10-080.3.02014-08-210.2.02013-11-170.1.02013-02-14

void session_abort ( void ) int session_cache_expire ([ string $new_cache_expire ] ) void session_commit ( void ) string session_create_id ([ string $prefix ] ) bool session_decode ( string $data ) bool session_destroy ( void ) string session_encode ( void ) int session_gc ( void ) array ...

There are many situations where it is useful to return several values from a function: for example, if you want to input an item and return the price and number in stock, this functionality could be useful. There are many ways to do this in C++, and most involve the STL. However, if you wish to avoi...

Strings are objects that represent sequences of characters. The standard string class provides a simple, safe and versatile alternative to using explicit arrays of chars when dealing with text and other sequences of characters. The C++ string class is part of the std namespace and was standardized i...

In Node.js, resource intensive operations such as I/O are performed asynchronously, but have a synchronous counterpart (e.g. there exists a fs.readFile and its counterpart is fs.readFileSync). Since Node is single-threaded, you should be careful when using synchronous operations, because they will...

Kotlin is a statically-typed object-oriented programming language developed by JetBrains primarily targeting the JVM. Kotlin is developed with the goals of being quick to compile, backwards-compatible, very type safe, and 100% interoperable with Java. Kotlin is also developed with the goal of prov...

C++ file I/O is done via streams. The key abstractions are: std::istream for reading text. std::ostream for writing text. std::streambuf for reading or writing characters. Formatted input uses operator>>. Formatted output uses operator<<. Streams use std::locale, e.g., for details ...

The built-in collections package provides several specialized, flexible collection types that are both high-performance and provide alternatives to the general collection types of dict, list, tuple and set. The module also defines abstract base classes describing different types of collection functi...

AttributeDetailsnameSets the element's name, to be used with an a tag to change the iframe's src.widthSets the element's width in pixels.heightSets the element's height in pixels.srcSpecifies the page that will be displayed in the frame.srcdocSpecifies the content that will be displayed in the fra...

An HTTP cookie is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user is browsing. bool setcookie( string $name [, string $value = "" [, int $expire = 0 [, string $path = "" [, string $domain = "" [,...

The $ character introduces parameter expansion, command substitution, or arithmetic expansion. The parameter name or symbol to be expanded may be enclosed in braces, which are optional but serve to protect the variable to be expanded from characters immediately following it which could be interprete...

MySQL: CREATE TABLE Employees ( Id int NOT NULL, PRIMARY KEY (Id), ... ); Others: CREATE TABLE Employees ( Id int NOT NULL PRIMARY KEY, ... );