pattern matching

pattern matching

See Also

Icon

a very capable pattern-matching system that is not based on regular expressions.

fptools

implements pattern matching on lists.

Description

There are a number of different options when it comes to matching data against some form of pattern. In Tcl, you might be interested in:

• simple string replacements, as in string map (which, in this case, patterns are classes of literal characters)
• matching file names: glob
• string match which are glob-style patterns
• regexp/regsub which are regular expressions
• searching for patterns in lists: lsearch
• switch / case
• array get/names/unset (which support string match type patterns)
• chan names (which supports string match type patterns)
• dict filter/key/values (which support string match type patterns)
• file channels (which supports string match type patterns)
• info commands/functions/globals/locals/procs/vars (which support string match type patterns)
• auto_import which supports namespace import patterns
• auto_mkindex which supports glob patterns
• namespace children
• namespace export
• namespace forget
• namespace import
• registry keys/values (which support string match type patterns)
• the Expect extension, which makes use of regular expressions
• algebraic types or unification