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On Thu, Oct 20, 2011 at 1:27 PM, Dan Nachbar <dan / nachbar.com> wrote:

> Has #group_by been integrated into Ruby?
>
> Last I heard, it was still only available as part
> of ActiveSupport although there was talk of working
> it into 1.9.
>

It is part of core. Fairly easy to check:

http://ruby-doc.org/core-1.8.7/Enumerable.html#method-i-group_by
http://ruby-doc.org/core-1.9.2/Enumerable.html#method-i-group_by

$ irb
>> RUBY_VERSION
"1.9.2"
>> Enumerable.instance_methods.grep(/group/)
[:group_by]

$ irb
>> RUBY_VERSION
["group_by"]

Plus ri, if you have it working.

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