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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
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.
The regular expression is a regular expression. It seems that English is better understood than Chinese, that is, the regular expression is checked for non-conforming characters !! Regular expressions have a powerful and complex object RegExp, which
The regular expression is a regular expression. It seems that English is better understood than Chinese, that is, checking expression charactersNot compliant !! Regular expressions have a very powerful and complex object Regexp. In javascript1.2.Let'
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,
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
A regular expression is an object that describes the character mode.
The Regexp object and string object in Javascript define a method that uses regular expressions to execute powerful pattern matching and text retrieval and replacement functions.
Document directory
C {n}
C {m, n}
C {n ,}
*, + ,?
Greedy and non-greedy
Matching results of sub-regular expressions are not recorded
Forward pre-Query
?!
Global match, modifier g
Case-insensitive, modifier I
The end of the first line,
The RegExp object and String object in JavaScript define a method that uses regular expressions to execute powerful pattern matching and text retrieval and replacement functions.
In JavaScript, regular expressions are represented by a RegExp object.
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