((( [logo]Racket )))Need Help?
AboutDownloadDocumentationPLaneTCommunityLearning

[plt-dev] range

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Wed May 20 12:41:46 EDT 2009		 
Is there a function that computes such lists:

> ;; Nat Nat -> [Listof Nat]
> (define (range lo hi)
>   (if (>= hi lo)
>       (build-list (+ (- hi lo) 1) (lambda (i) (+ lo i)))
>       (build-list (+ (- lo hi) 1) (lambda (i) (- lo i)))))
Posted on the dev mailing list.