[racket] For new Racket users

From: Stephen Chang (stchang at ccs.neu.edu)
Date: Sun Aug 28 11:43:24 EDT 2011

> You can also use for/string to make a pretty compact version.

I was trying to find something like that but it doesnt seem to exist?
I had to use string-map from srfi/13


Posted on the users mailing list.