From: Stefan Rusterholz <apeiros@...>
Date: 2007-07-17T04:41:34+09:00
Subject: Re: clean nice way (hash)

Florian Aßmann wrote:
> hash.update(hash) { |key, o_val, n_val| Hash['name' => o_val] }

Hash[foo => bar] is a needless method call. foo => bar is already a hash 
literal, Hash::[] creates a new hash from that hash (suprised me a bit 
tbh, as I don't really see a reason for it to do that), though. But 
since that's useless work and method calls weigh heavy in ruby, I'd not 
do that.

You can try it if you want:
x = {:a => :b}
Hash[x].equal?(x) # => false

Regards
Stefan

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