20 Minutes: Regular Expressions III

To extract a subset of the match...

Use parentheses to group the subset.

Use the special $1, $2, ... variables to refer to groups:


    while(<DATA>) {
        print "FOUND> $1\n" if m/^00 (.*) .F$/;
    }
    __DATA__
    00 99 12 83 C6 AB B7 AA DD 2F
    12 99 33 83 C6 DD FE DD 2C 0F
    00 98 18 83 1F 1C D0 E3 D0 DF
    00 83 1F 00 98 E3 D0 DF 1C D0

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