substitute/4

Replace substrings

substitute(+regexp, +string, +substitution, -result)

substitute/4 replaces in "string" the substring defined by "regexp" with "substitution". The modified string is returned in "result"

Arguments

	regexp		atom
	string		atom
	substitution	atom
	result		atom

Examples

e.g. to exchange the position of words 
	substitute('(%w+) (%w+)', 'one two', '%2 %1', L).
		==> L = 'two one'

Whatever is bracketed is assigned to a term. Whatever is bracketed by the from left to right i-th opening bracket is assigned to the i-th term. Bracketed terms can be referenced in substitute/4 and substitute_all/4 with %1...%9 in the substitute expression.

Standard

This predicate is not part of the ISO-Prolog Standard.

See also

regular expression, match/2/3, match_all/3, substitute/4, substitute_all/4, split/2/3, chop/2, get_line/1/2,

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