From: Yusuke ENDOH <mame@...>
Date: 2011-01-05T21:45:34+09:00
Subject: [ruby-core:34101] Re: Hash#select and Hash#reject bug in 1.9.2?

Hi,

2011/1/5 Lin Jen-Shin <godfat@gmail.com>:
> In terms of compatibility, I think it might be better to change
> actually,
> because 1.8.7 is consistent here.

Hmm.
At r13809, matz changed Hash#each to use yield([k, v]) instead of
yield(k, v).

http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=13809

Matz, did you intend this behavior change that Lin reported?


> On the other hand, I wonder if
> anyone is depending on `hash.select{ |(k, v)| }' while v is nil?

Though I may be too serious, I think of:

  h = {
    [1, 2] => "foo",
    [1, 3] => "bar",
    [2, 3] => "baz",
  }
  h = h.select {|(k1, k2)| (k1 + k2).odd? }
  p h  #=>  {[1, 2]=>"foo", [2, 3]=>"baz"}

-- 
Yusuke Endoh <mame@tsg.ne.jp>