What is a regular expression (regular expreSSion)
A regular expression is an object that describes a pattern of characters.
Can handle more complex strings
Regular expressions in JavaScript are represented using RegExp objects
Regular expressions are used for pattern matching and retrieval and replacement of strings, and are powerful tools for performing pattern matching on strings.
How to use regular expressions in JavaScript
grammar
var patt=new RegExp(pattern,modifierS)
Dynamically create regular expressions
var patt = / pattern / modifierS;
parameter
pattern ( pattern ) describes the pattern of the expression
modifierS is used to specify global matching , case-sensitive matching, and multi-line matching
Common modifiers
Modifiers are used to perform case-sensitive and glob matching
Square brackets
Square brackets are used to find characters within a range
metacharacter
Metacharacters are characters with special meanings
quantifier
Original link: http://www.maiziedu.com/wiki/js/regexp1/
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