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Re: Example function

X-seq: zsh-workers 5038
From: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxx>
To: "Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxx>, Phil Pennock <comet@xxxxxxxx>, Zsh Development Workers <zsh-workers@xxxxxxxxxxxxxx>
Subject: Re: Example function
Date: Tue, 26 Jan 1999 16:37:43 -0800
In-reply-to: <990126162520.ZM25560@xxxxxxxxxxxxxxxxxxxxxxx>
Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
References: <19990126184200.B27794@xxxxxxxx> <990126162520.ZM25560@xxxxxxxxxxxxxxxxxxxxxxx>

On Jan 26,  4:25pm, Bart Schaefer wrote:
> Subject: Re: Example function
> (One of the things on the associative-array wishlist is "reverse pattern"
> lookup, that is, treat the array keys as patterns and match them against
> the subscript.  Then you could do silly stuff like
> 
> 	typeset -A map
> 	map=('*.(gz|Z)'	zcat
> 	     '*.bz2' 'bzip2 -dc'
> 	     '*.bz' 'bzip -dc'
> 	     '*' '<')
> 	eval ${(q)map[$argv[i]]} '$argv[i]'
> 
> where I'm using (q) as the fictional reverse-pattern query flag; probably
> there's a better letter.)

Incidentally, the reason this isn't there already is that associative arrays
are unordered hashes, so you can't predict _which_ pattern will match the
subscript when you do the query -- '*' might match before '*.bz' is tried.

References:
- Example function
  - From: Phil Pennock
- Re: Example function
  - From: Bart Schaefer

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