From: Julian Leviston <julian@...>
Date: 2008-04-01T13:25:16+09:00
Subject: Re: assignment if key_exist? in Hash

What he's saying is if you want to retain the value of "false" or  
"nil", that won't work too well


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On 01/04/2008, at 3:15 PM, darren kirby wrote:

> quoth the ara.t.howard:
>> On Mar 31, 2008, at 9:30 PM, Peņa, Botp wrote:
>>> foo = some_hash["some_key"] || foo
>>
>> that replaces even if the key is set to 'false', 'nil', or if the  
>> hash
>> does not have the key...
>
> I don't understand...If the hash key doesn't exist then foo retains  
> its
> original value. That is the behaviour I require:
>
>> foo = "Some String"
>> h = {}
>> foo = h["none_such"] || foo
> => "Some String"
>> h = {"some_key"=>"some value"}
>> foo = h["some_key"] || foo
> => "some value"
>
> -d
> -- 
> darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
> "...the number of UNIX installations has grown to 10, with more  
> expected..."
> - Dennis Ritchie and Ken Thompson, June 1972
>