Regular Expressions may be used in a various Programming Languages
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Google Code Search Support for precise searches using regular expressions, Google Pages. Restricts by language, license, or filename with advanced operators. A search index that includes billions of lines of code POSIX extended CXXI. Regular Expression Functions (POSIX Extended). PHP also supports regular expressions using a Perl-compatible syntax using the PCRE functions. Those functions support non-greedy matching, assertions, conditional subpatterns, and a number of other features not supported by the POSIX-extended regular expression syntax. RegEx is a small and very simple utility that tests regular expressions before using them. It will tell you if there is a match or not and the value of captures if any. It also includes a comprehensive cheat sheet. Very useful if you deal with regular expressions on a daily basis. From Tredo
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Microsoft
Beefs Up VBScript with Regular Expressions (Scripting Clinic)
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BASIC
The Joy of Regular Expressions Part 1, Part 2, Part 3 From Site Point
Regular Expression Library, Latest Posted Regular Expressions:-
Regular Expressions Builder Library is a class library that adds object-oriented layer of bastraction onto .net Regex engine to help developer create even very
complicated regular expression, but instead of working with bare strings you get strongly typed, clear object model, and intellisence . This makes it is easier,
faster and less error prone to create regular expressions. Library will also enforce some best practices, help avoid pitfalls and even fine tune resulting
regex string to work faster.
STREGEX function performs regular expression matching against the strings contained in StringExpression. STREGEX can perform either a simple boolean
True/False evaluation of whether a match occurred, or it can return the position and offset within the strings for each match. The regular expressions accepted
by this routine, which correspond to "Posix Extended Regular Expressions", are similar to those used by such UNIX tools as egrep, lex, awk, and Perl.
PCRE,
(Perl Compatible Regular Expressions), Library is a set of functions that
implement regular expression pattern matching using the same syntax and
semantics as PERL,
with just a few differences.
Brief note: Non-greedy quantifiers have the same syntax as regular greedy ones, except with the quantifier followed by a question-mark. For example, a non-greedy pattern might look like: "
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/A[A-Z]*?B/". In English, this means "match an A, followed by only as many capital letters as are needed to find a B."
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