From: Roger Pack <rogerpack2005@...>
Date: 2008-09-05T02:02:32+09:00
Subject: Re: Hash optimization question

> Why do that?  Your identifiers is constant anyway - as far as I can
> see.  Why not just do
> 
> identifiers = {/abc/ => 'an abc line', /def/ => 'a def line'}.to_a

Yeah--works like a charm.

This makes me wish that there were a data structure that has 
object-based O(1) lookup/insertion/deletion, and O(n) .each calls. 
Apparently Hash doesn't :)

My theory is that some people use hashes just for the convenience of 
object-based lookup [ex: scope[:include] in rails] and not for the real 
strength of hashes, which, as you mentioned, is "efficient 
lookup/insertion/deletion"

Thanks!

-=R
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