From: Peter Szinek <peter@...>
Date: 2007-04-14T07:06:41+09:00
Subject: Re: Combining Hash elements to produce single line output

Peter Szinek wrote:
> Paul wrote:
>> Hi there.  I know I've done something similar to this before but I
>> seem to be stumped at the moment and thought I would ask for help.
>>
>> I have a temporary Hash array that holds information in different
>> elements that need to be combined to produce single line outputs.
>> Here's some detail:
>>
>> tmp_hash =
>> [["foo:1", "123"],
>>  ["foo:2", "abc"],
>>  ["bar:1", "456"],
>>  ["bar:2", "xyz"]]
>>
> Whew, this will be ugly... I am sure somebody has a more effective
> solution, but until then:
> 
> to_hash = tmp_hash.inject(Hash.new('')) {|hash, arr|
>   key = arr[0].scan(/(.+):/)[0][0]
>   hash[key] = hash[key]+(val = hash[key] == '' ? '' : ',')+arr[1]
>   hash }

Sorry this does not answer your question :-) It confused me that the 
original array was named 'hash' so for some reason I have thought you 
need a hash...

Cheers,
Peter
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