Js RegExp Object

1 syntax

1.1 Direct Volume syntax

/pattern/attributes

1.2 Creating a RegExp Object

New RegExp (pattern, attributes)

1.3 Description

Pattern is a regular expression, attributes refers to modifiers such as I,g,m

2 RegExp Object Methods

Method	Description
Exec	Retrieves the value specified in the string. Returns the found value and determines its location.
Test	Retrieves the value specified in the string. Returns TRUE or FALSE.

        Syntax: Regexpobject.test (String)        //Description: The test () method retrieves the specified value in the string. The return value is True or False        var Re1 = new RegExp ("^\s+$", "G");        var msg = re1.test ("he llo"); alert (msg);        Syntax: Regexpobject.exec (String)        //Description: The EXEC () method retrieves the specified value in the string. The return value is the value that was found. If no match is found, then null        var A is returned;        var Re2 = new RegExp ("E", "G");        do {            a = re2.exec ("Hello World hi!");            alert (a);        }        while (a! = null)

3 Methods for String objects that support regular expressions

Method	Description
Search	Retrieves a value that matches a regular expression.
Match	Finds a match for one or more regular expressions.
Replace	Replace the substring that matches the regular expression.
Split	Splits a string into an array of strings.

        Syntax: Stringobject.search (regexp)        //Description: Search () is retrieved from the beginning of the string and always returns the first matching position of Stringobject        var re3 = new RegExp (" World ");        var a = "Hello World". Search (Re3);        alert (a);        Syntax: Stringobject.match (searchvalue)        //Description: The match () method can retrieve the specified value within a string, or find the match for one or more regular expressions        var s = "Hi baby! hi! ";        var a = S.match (/hi/);        Alert (a instanceof Array);

Js RegExp Object