From: Robert Dober <robert.dober@...>
Date: 2010-09-01T22:49:31+09:00
Subject: Re: Array#=== as set equality

On Wed, Sep 1, 2010 at 11:03 AM, Intransition <transfire@gmail.com> wrote:
> It looks like Array#== and Array#=== are the same. Is that correct?
> That being so, would there be any serious consequences if Array#===
> were redefined to mean "set equality", e.g.
I'd prefer
>
>  [:a,:b] === [:b,:a]    #=> true
>
> I can think of a few times that would have been nice to have,
> especially when testing and hashes come into play, the results often
> do not have a fixed order. e.g.
>
>  h = {:a=>1, :b=>2}
>  r = h.map{ |k,v| [k,v] }
>
>  assert  r == [[:a,1], [:b,2]]
yup but in your case could you not do something like

assert_equal h, Hash[*r.flatten]

I say that because I'd prefer #=== to have the semantics of include?,
so that I can do

case some_value
when some_array
when other_array
end

Cheers
Robert
>
> won't work b/c it might also return
>
>  [[:b,2], [:a,1]]
>
>



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The best way to predict the future is to invent it.
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