From: Robert Klemme <shortcutter@...>
Date: 2008-10-02T00:53:31+09:00
Subject: Re: Mode method for Array

2008/10/1 David A. Black <dblack@rubypal.com>:
>> In that case #map might be more appropriate - at least if the target
>> collection is an Array.  Btw, did we ever discuss having #map accept a
>> parameter which defaults to []?  i.e.
>>
>> module Enumerable
>>  def map(target = [])
>>   each {|x| target << yield x}
>>   target
>>  end
>> end
>
> I don't think it's a good idea; it generalizes the idea of a mapping
> of a collection beyond anything that really seems to me to be a
> mapping. If I saw:
>
>  [1,2,3,4,5]   =>  "Hi."
>
> I would not just say it's a weird mapping; I would not be able to
> identify it as a mapping at all. It's a more general transformation.

I'm not sure I understand exactly what you mean.  My point was simply
to allow the caller to provide the target collection where something
is mapped to.  Of course you can then also use a String or anything
else that supports << (a stream for example) which I find quite neat.
But where does "=>" syntax come into play?

Kind regards

robert

-- 
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