We can use: ^: match the beginning $: match the end Let's say we have the string like the following: var str = `// -- // --`; What we want to do is get all the '12' which at the begining of each line: If we do like that: var regex = /^/g; To solve th…

Regular Expression Backreferences provide us a method to match a previously captured pattern a second time. For example we have an string, and we want to any word which appear twice at the same time: var str = "Time is the the most important thing th…

catalog . PCRE Introduction . pcre2api . pcre2jit . PCRE Programing 1. PCRE Introduction The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native…

Regular expressions are a language of their own. When you learn a new programming language, they're this little sub-language that makes no sense at first glance. Many times you have to read another tutorial, article, or book just to understand the "s…

http://docs.oracle.com/javase/tutorial/essential/regex/index.html This lesson explains how to use the java.util.regex API for pattern matching with regular expressions. Although the syntax accepted by this package is similar to the Perl programming l…

Regular expressions are used to search and manipulate the text, based on the patterns. Most of the Linux commands and programming languages use regular expression. Grep command is used to search for a specific string in a file. Please refer our earli…

var str = "Is this This?"; //var regex = new RegExp("is", "gi"); var regex = /is/gi; //console.log(regex.test(str)); console.log(regex.exec(str)); //["Is", index: 0, input: "Is this This?"] console.log(reg…

Introducing Regular Expressions 读书笔记 工具: regexbuddy:http://download.csdn.net/tag/regexbuddy%E7%A0%B4%E8%A7%A3 在线测试平台: http://www.regexpal.com/ http://gskinner.com/RegExr/ 进阶读物: Mastering Regular Expressions Regular Expressions Cookbook 资料: Notepad++…

Regular expressions are a language of their own. When you learn a new programming language, they're this little sub-language that makes no sense at first glance. Many times you have to read another tutorial, article, or book just to understand the "s…

Regular expressions are a powerful language for matching text patterns. This page gives a basic introduction to regular expressions themselves sufficient for our Python exercises and shows how regular expressions work in Python. The Python "re"…