- (string-titlecase s [start end]) -> stringprocedure
- (string-titlecase! s [start end]) -> unspecifiedprocedure
For every character C in the selected range of S, if C is preceded by a cased character, it is downcased; otherwise it is titlecased.
string-titlecase returns the result string and does not alter its S parameter. string-titlecase! is the in-place side-effecting variant.
(string-titlecase "--capitalize tHIS sentence.") => "--Capitalize This Sentence." (string-titlecase "see Spot run. see Nix run.") => "See Spot Run. See Nix Run." (string-titlecase "3com makes routers.") => "3Com Makes Routers."
Note that if a START index is specified, then the character preceding S[START] has no effect on the titlecase decision for character S[START]:
(string-titlecase "greasy fried chicken" 2) => "Easy Fried Chicken"
Titlecase and cased information must be compatible with the Unicode specification.