Documenting Perl Regular ExpressionsPublished on 30 Jan 2005
Regular expressions can easily be documented which is demonstrated in the following example matching floating point numbers:
/^ [+-]? # first, match an optional sign ( # then match integers or f.p. mantissas: \d+.\d+ # mantissa of the form a.b |\d+. # mantissa of the form a. |\.\d+ # mantissa of the form .b |\d+ # integer of the form a ) ([eE][+-]?\d+)? # finally, optionally match an exponent $/x;
See also: Avoiding Regular Expressions
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