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Regular Expression Flavor Comparison – Detailed comparison of the most popular regular expression flavors; Regexp Syntax Summary; Online Regular Expression Testing – with support for Java, JavaScript, .Net, PHP, Python and Ruby; Implementing Regular Expressions – series of articles by Russ Cox, author of RE2; Regular Expression Engines
mixed mode: PHP + HTML + JavaScript + CSS, single-mode: PHP, Javascript, CSS, XML; extensible Hundreds of languages Syntax checking HTML, CSS, JavaScript (using JSHint) Some No JavaScript (using JSLint) No No HTML, JavaScript (using JSLint) HTML, CSS, JavaScript, TypeScript Tab support Yes Yes Yes Yes Some Yes Yes Yes Indent, new line keeps level
A regular expression (shortened as regex or regexp), [1] sometimes referred to as rational expression, [2] [3] is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings , or for input validation .
JSFiddle is an online IDE which is designed to allow users to edit and run HTML, JavaScript, and CSS code on a single page. [3] Its interface is minimalist and split into four main frames, which correspond to editable HTML, JavaScript and CSS fields and a result field which displays the user's project after it is run.
Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language. Philip Hazel started writing PCRE in summer 1997. [ 3 ]
Jasmine is an open-source testing framework for JavaScript. [4] It aims to run on any JavaScript-enabled platform, to not intrude on the application nor the IDE , and to have easy-to-read syntax. It is heavily influenced by other unit testing frameworks, such as ScrewUnit, JSSpec, JSpec, and RSpec .
Version 1.0 was released on 18 November 2003. Squish uses property-based object identification (independent of screen position), and is able to record and replay test scripts written in JavaScript, Perl, Python, Ruby or Tcl.
A regular expression denial of service (ReDoS) [1] is an algorithmic complexity attack that produces a denial-of-service by providing a regular expression and/or an input that takes a long time to evaluate.