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Match and replace methods for strings in JavaScript

Source: Internet
Author: User
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1. Match method

The match () method retrieves the specified value within a string, or finds a match for one or more regular expressions.

The return value of the match () method is: An array that holds the matching results .

2. Replace method

The replace () method is used to replace other characters with some characters in a string, or to replace a substring that matches a regular expression.

The return value of the Replace method is: a new string .

3. Description

The parameters of the above 2 methods are mainly to add global g when using regular expressions, so that the string can be fully matched or replaced.

Example code:

<!DOCTYPE HTML><HTMLLang= "zh">    <Head>        <MetaCharSet= "UTF-8" />        <title>Match and replace methods for strings in JavaScript</title>    </Head>    <Body>        <!--Note that the SRC path should be -        <Scriptsrc= "Js/jquery-1.12.4.min.js"type= "Text/javascript"CharSet= "Utf-8"></Script>        <Scripttype= "Text/javascript">            varStr= "1 plus 2 equal 3"; //The match method returns an array of values            vararr=Str.match (/[0-9]/g) Console.log (arr); varNew_str=Str.replace (/[0-9]/G,'Newstr'); //Replace method returns a value of new stringConsole.log (NEW_STR)</Script>    </Body></HTML>

The console output is:

Match and replace methods for strings in JavaScript

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