regular expression literal

Special characters in regular expressions Character implication \ As a turn, that is, the characters usually after "\" are not interpreted in the original sense, such as the/b/matching character "B", when B is preceded by a backslash/\b/, to

On page 72nd of the JavaScript language essence, there is a paragraph: RegExp object created with regular expression literal to share the same single instance: Copy Code code as follows: function Make_a_matcher () { Return/a/gi;

The checksum is all made up of numbers Funtin Isigit (s) {var patrn=/^[0-9]{1,20}$/; if (!patrn.x (s)) Rturn Fals Rturn Tru} Javasript Form validation mail to determine whether an input is mailbox mail and implemented through regular expressions.

On the 72nd page of JavaScript: Use a regular expression to literally create a RegExp object to share the same single instance:Copy codeThe Code is as follows: function make_a_matcher (){Return/a/gi;}Var x = make_a_matcher ();Var y = make_a_matcher

The regular expression of JSWhether the checksum is all made up of numbersCodefunction IsDigit (s){var patrn=/^[0-9]{1,20}$/;if (!patrn.exec (s)) return falsereturn True}Check login name: Only 5-20 entries begin with a letter, can be numbered, "_", "

On the 72nd page of JavaScript:Use a regular expression to literally create a RegExp object to share the same single instance:Copy codeThe Code is as follows:Function make_a_matcher (){Return/a/gi;}Var x = make_a_matcher ();Var y = make_a_matcher ();

JavaScript's RegExp objects and string objects define methods that use regular expressions to perform powerful pattern matching and text retrieval and substitution functions. In JavaScript, regular expressions are represented by a RegExp object. Of

Regular Regular expression is regular expression, it seems that English is better than Chinese understand more, is to check expression characters do not conform to the rules!! Regular expressions have a very powerful and complex object regexp,

Replace () is a simple replacement of characters. ExampleCodeAs follows: It only replaces the first letter. However, if you add a regular expression, the results will be different! Replace () supports regular expressions. It can match

Regular expression syntax on JavaScript Author: no powerSource: http://www.blog.edu.cn/user2/afan/archives/2006/1215847.shtml   A regular expression is an object that describes the character mode.The Regexp object and string object in Javascript