From: botp <botpena@...>
Date: 2012-02-02T18:03:28+09:00
Subject: Re: Multiple assignment in conditional

On Thu, Feb 2, 2012 at 4:57 PM, botp <botpena@gmail.com> wrote:
> On Thu, Feb 2, 2012 at 3:47 PM, Robert Klemme
> <shortcutter@googlemail.com> wrote:
>> On Thu, Feb 2, 2012 at 3:56 AM, botp <botpena@gmail.com> wrote:
>>> indeed. ruby just checks the last assignment.
>>>
>>>> if (x,y=(a, b = foo))
>>>> p 1
>>>> end
>>> SyntaxError: (irb):17: multiple assignment in conditional
>>>
>>> but i do not know why it has to do that checking. too much work. and
>>> could probably slow down ruby.
>>
>> Probably because (a,b=foo) in all but the latest version always yields
>> an Array which is true hence does not make sense as a condition.  You
>> could write if (true) as well.
>
> ah, portability/compatibility. i guess we're stucked then :)
> thanks Robert.
> best regards -botp

ok, i'll take it back, since,
if only the latest version makes sense, then wouldn't that mean it's
not really being used in the earlier versions,  and therefore,  it
*is* safe to implement it currently, ie remove the checking?

kind regards -botp