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To get a more visual look into how regular expressions work, try our visual java regex tester.You can also watch a video to see how the visual regex tester works. “31/4/20100”, “31/04/2010” – April has 30 days only 8. “333/2/2008”, “29/02/200a” – day is invalid, year is invalid 7.There are many good tutorial available on the internet and no reason to repeat those efforts.
Regular expressions are not only a part of Java Script and PERL, but also a part of PHP, ASP, most UNIX/Linux commands, and most other serverside scripting languages used for CGI. This is intended to be a cook book of useful regular expression examples. Although the syntax accepted by this package is similar to the Perl programming language, knowledge of Perl is not a prerequisite.This lesson starts with the basics, and gradually builds to cover more advanced techniques.The literal form, shown in the following table, can be used in any place that accepts a variable created with the constructor or created by a literal assignment.The following table lists the meta-characters that can be used in Java Script regular expressions.