The expression returns a true or false value, that is to say, it is checking to see if $key matches the expression.
/^r(\d+)c(\d+)$/ Broken down that means, ^ - means it must be at the very beginning of the line r - just means to look for an 'r', but because it is next to ^, it has to be at the beginning. (\d+) - means look for 'digit' or number characters, and the + specifies that it must find at least one. otherwise it wouldn't match. The ( and ) mean to save anything it matches between them into the special variables $1, $2, etc. c - just means to look for a 'c', (\d+) - same as above, except that it is next to the '$' at the end. which means that the numbers must go to the very end of the line. I hope that was enough detail, and that it helps you out. Good Luck, Joshua Colson Systems Administrator Giant Industries, Inc. (480) 585-8714 [EMAIL PROTECTED] -----Original Message----- From: Jerry Preston [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 5:14 AM To: begginners Subject: need help to understand a regex All, I need to understand this regex in detail: $key=~/^r(\d+)c(\d+)$/ Thanks for your help and time, Jerry -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
