From: ts <decoux@...>
Date: 2003-09-13T21:49:31+09:00
Subject: Re: order of evaluation for method arguments

>>>>> "d" == daz  <dooby@d10.karoo.co.uk> writes:

d> "Michael Garriss" <mgarriss@earthlink.net> wrote:

>> a = [1,2,3,4,5]
--> [1, 2, 3, 4, 5]
>> b = [a.shift,a.shift,a.shift,a.shift,a.shift]
--> [1, 2, 3, 4, 5]
>> 

d> Well, since:

d>    a, b = b, a

d> is 'defined' (in the sense that it's a ruby idiom),
d> your example works the way I'd expect, even though
d> Matz has guarded his options. 

 I don't see the relation between the two.

 The first modify `a' in the RHS, the second not.

 Perhaps, it can exist a version of ruby which give

 b = [5, 4, 3, 2, 1]

 and where

 a, b = b, a

 still work


Guy Decoux