From: Chad Perrin <perrin@...>
Date: 2007-03-04T14:20:41+09:00
Subject: Re: Programming Ruby book p.50 (Fibonacci yield example)

On Sun, Mar 04, 2007 at 02:34:00AM +0900, Gary Wright wrote:
> 
> On Mar 3, 2007, at 12:13 PM, Mike Glaz wrote:
> >5.     i1, i2=i2, i1+i2
> [...]
> >But I have no clue what is happenening in line 5.
> 
> The spacing in your text is a bit misleading.
> This makes it a little clearer:
> 
>       i1,i2  =  i2,(i1+i2)
> 
> This is Ruby's multiple assignment statement. The
> expressions on the right are evaluated into a list and
> assigned, in order, to the variables on the left.

I probably would have done it thusly:

  i1, i2 = i2, i1 + i2
. . . or:
  i1, i2 = [i2, i1 + i2]

. . . or something to that effect.  Somehow, it seems more readable to
me.  YMMV.

Do my versions for any particular reason seem unlike the typical Ruby
idiom for some reason?  I'm curious.

-- 
CCD CopyWrite Chad Perrin [ http://ccd.apotheon.org ]
"There comes a time in the history of any project when it becomes necessary
to shoot the engineers and begin production." - MacUser, November 1990