From: Yukihiro Matsumoto <matz@...>
Date: 2009-08-29T22:25:52+09:00
Subject: Re: #map, #select semantics

Hi,

In message "Re: #map, #select semantics"
    on Sat, 29 Aug 2009 21:32:21 +0900, 7rans <transfire@gmail.com> writes:

|Let's say we have
|
|  [[:a,1], [:b,2]].map{ |(k,v)| [k, v+1] }  #=> [[:a,2], [:b,3]]
|
|We might have something like:
|
|  [[:a,1], [:b,2]].using({}).map{ |(k,v)| [k, v+1] }  #=> {:a=>2, :b=>3}

[[:a,1], [:b,2]].inject({}){|h,(k,v)| h[k]=v+1; h}     #=> {:a=>2, :b=>3}

							matz.