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Re: (loop with (VAR1 VAR2) ...)


From: Thien-Thi Nguyen
Subject: Re: (loop with (VAR1 VAR2) ...)
Date: Mon, 17 Mar 2014 07:29:58 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

() Barry Margolin <address@hidden>
() Sun, 16 Mar 2014 21:28:01 -0400

   Does it mention "destructuring"? Any place where a single variable is 
   allowed, you can have a list of variables, and it will assign them from 
   the list of values.

It's mentioned specifically for ‘for’ VARs in (info "(cl) For Clauses")
so i suppose this is a doc bug (missing xref).  Or maybe the description
should be moved to "Loop Basics".  Anyway:

 (loop with (x y) = '(10 20) 
       for n upto 5 
       collect (cons (* n x) 
                     (* n y)))
 ((0 . 0)
  (10 . 20)
  (20 . 40)
  (30 . 60)
  (40 . 80)
  (50 . 100))

it works w/ ‘with’ as well as for ‘for’; i'm happy.  Thanks for the tip.

-- 
Thien-Thi Nguyen
   GPG key: 4C807502
   (if you're human and you know it)
      read my lisp: (responsep (questions 'technical)
                               (not (via 'mailing-list)))
                     => nil

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