chickadee » srfi-13 » string-map

(string-map proc s [start end]) -> stringprocedure
(string-map! proc s [start end]) -> unspecifiedprocedure

PROC is a char->char procedure; it is mapped over S.

string-map returns the result string and does not alter its S parameter. string-map! is the in-place side-effecting variant.

Note: The order in which PROC is applied to the elements of S is not specified.