Regular Expression - 正则表达式
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Regular Expression: (regex or regexp) is a sequence of characters that forms a search pattern, mainly for use in pattern matching with strings, or string matching. (From wiki)
Lists of a particular category of characters, operators and constructs that can be used to define regular expressions:
Character Escapes:
Character Classes: matches any one of a set of characters.
Anchors: cause a match to succeed or fail depending on the current position in the string.
Grouping Constructs
Quantifiers:
Backreference Constructs: allows a previously matched subexperession to be identified subsequently in the same regular expression.
Alternation Constructs: Modify a regular expression to enable either/or matching.
Substitutions: are regular expression language elements that are supported in replacement patterns.
Regular Expression Options:
Miscellaneous Constructs:
References: http://msdn.microsoft.com/en-us/library/az24scfc(v=vs.110).aspx
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