From: Walton Hoops <walton@...>
Date: 2010-05-04T23:05:23+09:00
Subject: Re: Something I expected to work, but didn't!

On 5/4/2010 5:31 AM, Kurtis Rainbolt-greene wrote:
> Alex DeCaria wrote:
>
>   
>> compound assignment operators such as *=, +=, etc. aren't allowed 
>> with parallel assignment.
>>     
> Ah-ha, someone gets what I was talking about, but my point was they 
> should be allowed. "Path of least surprise" and all that, plus this 
> looks cleaner:
>
> x, y, z = 2, 4, 6
>
> x, y += z
>
> than
>
> x, y, z = 2, 4, 6
>
> x += z
> y += z
>   
I think you misunderstand how multiple assignment works:
irb(main):001:0>  x, y=2
=> 2
irb(main):002:0> x
=> 2
irb(main):003:0> y
=> nil

In other words, even if that was allowed, the two snippets you provided
would not be equivalent.