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From: "William D.Neumann" <wneumann@cs.unm.edu>
Subject: Re: [Caml-list] String to list to string
Date: Wed, 9 Feb 2005 19:27:37 -0700
To: =?ISO-8859-1?Q?Juancarlo_A=F1ez?= <apalala@gmail.com>
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On Feb 9, 2005, at 7:10 PM, Juancarlo A=F1ez wrote:

> Why aren't there functions in the standard library to convert strings=20=

> to
> lists of characters and back?

Because a) they're not all that useful and b) they're trivial to write=20=

for yourself:

let explode s =3D
   let rec exh acc =3D function
   | -1 -> acc
   | i -> exh (s.[i]::acc) (pred i)
   in exh [] (pred (String.length s))

let implode l =3D
   let s =3D String.create (List.length l) in
   let rec imh i =3D function
   | h::t -> s.[i] <- h; imh (succ i) t
   | [] -> s
   in imh 0 l

William D. Neumann

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