See: Pattern Matching Task.
- (Wall et al., 1996) ⇒ Larry Wall, Tom Christiansen, and Randal L. Schwartz. (1996). “Programming Perl, 2nd edition." O'Reilly. ISBN:1565921496
- pattern matching: Taking a pattern, expressed as a regular expression, and trying the pattern various ways on a string to see if there's any way to make it fit. Often used to pick interesting tidbits out of a file.