From: John Barnette <jbarnette@...>
Date: 2008-03-11T15:12:20+09:00
Subject: Re: is this a feature or a bug?

On Mon, Mar 10, 2008 at 10:59 PM, Rie! <ariekusumaatmaja2@gmail.com> wrote:
> sorry if it's been discussed as i don't know what the search keyword
>  for this scenario. it actually came up from _mistype_ (notice the
>  comma).
>
>  m:~ arie$ irb
>  >> h = {}
>  => {}
>  >> h[:a] = 1,
>  ?> h[:b] = 2
>  => [1, 2]
>  >> h
>  => {:a=>[1, 2], :b=>2}

This is expected behavior. You've assigned a two-element list to h[:a]

  - the number 1
  - an assignment expression yielding the number 2

Since assignment expressions return their rval, everything's happy and legal.

This one-line version behaves identically to what you've typed:

h[:a] = [1, h[:b] = 2]



~ j.