From: benny <linux@...>
Date: 2004-01-28T18:49:53+09:00
Subject: Re: newbee question about "missing" hash methods +, += and <<

Am Wed, 28 Jan 2004 10:27:35 +0100
schrieb "Robert Klemme" <bob.news@gmx.net>:

> No, we were talking about "-":  If h is a Hash that contains hashes as
> keys like h = { {"foo"=>"bar"} =>1 } then how is "h - x" interpreted if x
> is a Hash?  It's ambiguous.
> 
> Regards
> 
>     robert
> 

I wasn't successful in deleting a key from hash, which is an hash on its own.

h = { {"foo"=>"bar"} =>1 }.delete({"foo"=>"bar"})

doesn't seem to work. any idea?

if there is no way to delete such a key then there would be no difference to "-" : 
in both cases the whole entry would be deleted. 

{"foo" => "bar"}.delete("foo") = {"foo" => "bar"} - {"foo" => "bar"} 

anyway its a very special case to have a key which is a hash, I think. I don't see where such a
thing would make sense and was suprised that its possible (maybe ruby is the only
language to allow such a thing?).

when I think of a "key" I think of a quick index-like reference to find something quickly. 

regards benny