From: Benoit Daloze <eregontp@...>
Date: 2011-10-20T18:49:54+09:00
Subject: [ruby-core:40245] Re: [ruby-core:40244] Enumerable#count doesn’t call #size anymore

Hi,

On 20 October 2011 11:28, Nikolai Weibull <now@bitwi.se> wrote:
> According to the documentation, Enumerable#count calls #size on the
> object if it responds to it.
>
> This behavior was removed on October 31, 2009 (in Git
> c0a0aa0c47f2cd5c97a35effb8b073eeb84b7d2d).
>
> The discrepancy between documentation and implementation
> notwithstanding nor the fact that it�s been two years since the change
> was made, I don�t think that this was an optimization that should be
> removed on a whim. �I have come to depend on this behavior, as I much
> prefer #count as a name to #length and #size in many cases. �Yes,
> Array implements its own version of #count that is the same as #size,
> but this isn�t true for, for example, Hash.
>
> Yes, Ruby 1.9 (or is that 2.0 now?) is still a moving target, but it
> saddens me that changes like these can be made so easily without
> notifying the community and � much, much worse � without updating the
> relevant documentation.

I totally agree, it seems a consistent and good optimization not worth
to remove.

I once wanted to add that feature back with Marc-Andr�'s
Enumerable#size{,=} patch ( http://redmine.ruby-lang.org/issues/3715
).