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Re: Scheme question: convert a range


From: David Kastrup
Subject: Re: Scheme question: convert a range
Date: Mon, 16 Nov 2015 21:59:44 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux)

Simon Albrecht <address@hidden> writes:

> Hello,
>
> The subject certainly seems cryptic – it’s difficult to summarize, but
> an example will make it clear immediately.
> I want to write a scheme procedure, which takes a pair like #'(3 . 7)
> and returns a list with all the numbers in the range: #'(3 4 5 6 7)
> How is this done most easily?

(let ((x '(3 . 7)))
  (iota (- (cdr x) (car x) -1) (car x)))

-- 
David Kastrup



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