143 lines
2.7 KiB
OCaml
143 lines
2.7 KiB
OCaml
include String
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(** Split a string on a given character *)
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let split ?(on=' ') str =
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split_on_char on str
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(*
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let rec do_work ?(accu=[]) ?(left="") = function
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| "" -> List.rev (left::accu)
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| s ->
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let new_s =
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(length s) - 1
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|> sub s 1
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in
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if (s.[0] = on) then
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let new_accu =
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left :: accu
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in
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do_work ~accu:new_accu new_s
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else
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let new_left =
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concat "" [ left ; make 1 s.[0] ]
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in
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do_work ~accu ~left:new_left new_s
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in
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do_work str
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*)
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(** Strip blanks on the left of a string *)
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let ltrim s =
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let rec do_work s l =
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match s.[0] with
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| '\n'
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| ' ' -> do_work (sub s 1 (l-1)) (l-1)
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| _ -> s
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in
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let l =
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length s
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in
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if (l > 0) then
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do_work s l
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else
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s
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(** Strip blanks on the right of a string *)
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let rtrim s =
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let rec do_work s l =
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let newl =
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l-1
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in
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match s.[newl] with
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| '\n'
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| ' ' -> do_work (sub s 0 (newl)) (newl)
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| _ -> s
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in
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let l =
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length s
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in
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if (l > 0) then
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do_work s l
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else
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s
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(** Strip blanks on the right and left of a string *)
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let strip = String.trim
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(** Split a string in two pieces when a character is found the 1st time from the left *)
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let lsplit2_exn ?(on=' ') s =
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let length =
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String.length s
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in
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let rec do_work i =
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if (i = length) then
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begin
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raise Not_found
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end
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else if (s.[i] = on) then
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( String.sub s 0 i,
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String.sub s (i+1) (length-i-1) )
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else
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do_work (i+1)
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in
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do_work 0
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(** Split a string in two pieces when a character is found the 1st time from the right *)
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let rsplit2_exn ?(on=' ') s =
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let length =
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String.length s
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in
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let rec do_work i =
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if (i = -1) then
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begin
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raise Not_found
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end
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else if (s.[i] = on) then
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( String.sub s 0 i,
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String.sub s (i+1) (length-i-1) )
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else
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do_work (i-1)
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in
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do_work length
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let lsplit2 ?(on=' ') s =
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try
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Some (lsplit2_exn ~on s)
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with
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| Not_found -> None
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let rsplit2 ?(on=' ') s =
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try
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Some (rsplit2_exn ~on s)
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with
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| Not_found -> None
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let to_list s =
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Array.init (String.length s) (fun i -> s.[i])
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|> Array.to_list
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let fold ~init ~f s =
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to_list s
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|> List.fold_left f init
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let is_prefix ~prefix s =
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let len =
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String.length prefix
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in
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if len > String.length s then
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false
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else
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prefix = String.sub s 0 len
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let of_char c =
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String.make 1 c
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