Pattern matching is the abstraction of different appearances into the identification of being one object and is available only in highly organized creatures
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In some languages with pattern matching, such as Standard ML, OCaml, and Haskell, the pattern matches any value, but does not perform binding.
Steve Johnson used the bottom-up LALR parsing algorithms to create the syntax-analyzer generator yacc, and Michael E. Lesk and Eric Schmidt used Aho's regular-expression pattern-matching algorithms to create the lexical-analyzer generator lex.
AMBIT, a family of pattern matching programming languages
Later he went on to start SeeqPod Inc. a music search, discovery and pattern matching company in which the U.S. Department of Energy, along with Lawrence Berkeley National Laboratory, holds a 5% stake.
Larry Tesler improved the pattern matching system to implement a successor language called LISP70, which was only completed to a preliminary version.
Ruby and Perl use $ as a special variable described as the “default input and pattern matching space” — any output defaults to that variable, and may be omitted.