정규식 사용방법

 Regular ｅxpressions methods and usage

Now, knowing how a RegExp is written is only half the game. To gain anything from them you have to know how to use them too. There are a number of ways to implement a RegExp, some through methods belonging to the String object, some through methods belonging to the RegExp object. Whether the regular ｅxpression is declared through an object constructor or a literal makes no difference as to the usage.

Description	Example
RegExp.exec(string)
Applies the RegExp to the given string, and returns the match information.	var match = /s(amp)le/i.exec("Sample text") match then contains ["Sample","amp"]
RegExp.test(string)
Tests if the given string matches the Regexp, and returns true if matching, false if not.	var match = /sample/.test("Sample text") match then contains false
String.match(pattern)
Matches given string with the RegExp. With g flag returns an array containing the matches, without g flag returns just the first match or if no match is found returns null.	var str = "Watch out for the rock!".match(/r?or?/g) str then contains ["o","or","ro"]
String.search(pattern)
Matches RegExp with string and returns the index of the beginning of the match if found, -1 if not.	var ndx = "Watch out for the rock!".search(/for/) ndx then contains 10
String.replace(pattern,string)
Replaces matches with the given string, and returns the edited string.	var str = "Liorean said: My name is Liorean!".replace(/Liorean/g,'Big Fat Dork') str then contains "Big Fat Dork said: My name is Big Fat Dork!"
String.split(pattern)
Cuts a string into an array, making cuts at matches.	var str = "I am confused".split(/\s/g) str then contains ["I","am","confused"]

On that note I conclude the tutorial. Now go express yourself with JavaScript regular ｅxpressions!

• Tutorial introduction
• Regular ｅxpression patterns
• Regular ｅxpression methods and usage

This tutorial is written by David Andersson (Liorean). Liorean is a twenty years old medical student and hobbyist web designer mostly working with JavaScript and CSS, DOM and the newest html standards available.