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StringLabels(3) OCaml library StringLabels(3) NAME
StringLabels - String operations. Module Module StringLabels Documentation Module StringLabels : sig end String operations. val length : string -> int Return the length (number of characters) of the given string. val get : string -> int -> char String.get s n returns character number n in string s . The first character is character number 0. The last character is character number String.length s - 1 . You can also write s.[n] instead of String.get s n . Raise Invalid_argument index out of bounds if n is outside the range 0 to (String.length s - 1) . val set : string -> int -> char -> unit String.set s n c modifies string s in place, replacing the character number n by c . You can also write s.[n] <- c instead of String.set s n c . Raise Invalid_argument index out of bounds if n is outside the range 0 to (String.length s - 1) . val create : int -> string String.create n returns a fresh string of length n . The string initially contains arbitrary characters. Raise Invalid_argument if n < 0 or n > Sys.max_string_length . val make : int -> char -> string String.make n c returns a fresh string of length n , filled with the character c . Raise Invalid_argument if n < 0 or n > Sys.max_string_length . val copy : string -> string Return a copy of the given string. val sub : string -> pos:int -> len:int -> string String.sub s start len returns a fresh string of length len , containing the characters number start to start + len - 1 of string s . Raise Invalid_argument if start and len do not designate a valid substring of s ; that is, if start < 0 , or len < 0 , or start + len > StringLabels.length s . val fill : string -> pos:int -> len:int -> char -> unit String.fill s start len c modifies string s in place, replacing the characters number start to start + len - 1 by c . Raise Invalid_argu- ment if start and len do not designate a valid substring of s . val blit : src:string -> src_pos:int -> dst:string -> dst_pos:int -> len:int -> unit String.blit src srcoff dst dstoff len copies len characters from string src , starting at character number srcoff , to string dst , start- ing at character number dstoff . It works correctly even if src and dst are the same string, and the source and destination chunks overlap. Raise Invalid_argument if srcoff and len do not designate a valid substring of src , or if dstoff and len do not designate a valid sub- string of dst . val concat : sep:string -> string list -> string String.concat sep sl concatenates the list of strings sl , inserting the separator string sep between each. val iter : f:(char -> unit) -> string -> unit String.iter f s applies function f in turn to all the characters of s . It is equivalent to f s.[0]; f s.[1]; ...; f s.[String.length s - 1]; () . val iteri : f:(int -> char -> unit) -> string -> unit Same as String.iter , but the function is applied to the index of the element as first argument (counting from 0), and the character itself as second argument. Since 4.00.0 val map : f:(char -> char) -> string -> string String.map f s applies function f in turn to all the characters of s and stores the results in a new string that is returned. Since 4.00.0 val trim : string -> string Return a copy of the argument, without leading and trailing whitespace. The characters regarded as whitespace are: ' ' , '