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Date: Tue, 1 Mar 2011 12:13:02 -0500 (EST)
From: "Benjamin R. Haskell" <zsh@benizi.com>
To: Greg Klanderman <gak@klanderman.net>
cc: Zsh list <zsh-workers@zsh.org>
Subject: Re: 'K' subscript flag with associative array?
In-Reply-To: <19821.9197.225140.311873@gargle.gargle.HOWL>
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On Tue, 1 Mar 2011, Greg Klanderman wrote:

>
> Hi guys, what am I doing wrong here?  Shouldn't this:
>
>  zsh% echo ${(k)functions[(K)_*]}
>
> give all function names starting with '_'?

You want:

${functions[(I)_*]}


If I'm reading the man page right, I'd interpret your attempt as:

the list of functions whose names, when taken as patterns, match the 
literal string: '_*'

K treats the keys as patterns.

Most function names don't contain pattern metachars, so when taken as 
patterns, only match their own names.

But, for example:

$ '??' () { echo question everything }
$ print -l ${(k)functions[(K)_*]}
??
# because the key '??' matches any two characters
$ print -l ${(k)functions[(K)lj]}
??

Not sure what the utility is, though.  Something like this, I guess?

$ typeset -A featureset
$ featureset=( '*.*' hasadot 'test.*' 'test function' )
$ print -l ${featureset[(K)lkjlkjljk.ojojojoj]}
hasadot
$ print -l ${featureset[(K)test.function]}
hasadot
test function

-- 
Best,
Ben