matching - how to match in perl using \d? -


just stupid question - meaning of d in following code. role playing in it?

$str = 'telephone: 040-27614396'; $str =~ m/telephone:\s*(\d{3}-\d{8})$/;

please tell meaning of these kind of stuff

if (/^\#/)

the expression checking if string variable $str matches regular expression /telephone:\s*(\d{3}-\d{8})$/.

look here more details on perl expression matching:

http://www.tutorialspoint.com/perl/perl_regular_expressions.htm

the link discusses:

  • \d: matches digits. equivalent [0-9].
  • ^: matches beginning of line.
  • \: "escapes" following character: "#" means treat "#" "#" ... instead of trying interpret metacharacter.

there many tutorials "regular expressions" on web can explain in more depth.


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