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From: Bart Schaefer <schaefer@brasslantern.com>
Date: Sat, 27 Oct 2018 19:45:45 -0700
Message-ID: <CAH+w=7Y9smyfMuwthY5xL1sDSwmNrzJtcjPZFHj+KOrAZUmzfQ@mail.gmail.com>
Subject: Re: Filtering array on index
To: dana <dana@dana.is>
Cc: =?UTF-8?Q?Jesper_Nyg=C3=A5rds?= <jesper.nygards@gmail.com>, 
	Zsh Users <zsh-users@zsh.org>
Content-Type: text/plain; charset="UTF-8"

On Fri, Oct 26, 2018 at 1:22 AM dana <dana@dana.is> wrote:
>
> If so, i guess this might qualify as 'compact':
>
>   ${filters:#${~:-(${(j<|>)${(b)overrides/#-f/-v}})}}

It's not even as difficult as that if you don't need to keep the "-v" prefixes:

% print -lr -- ${${filters#-v}:#${(j:|:b)~overrides#-f}}
two

If there are no filters that are a proper suffix of another filter,
you can do this to preserve the "-v" prefix:

% print -lr -- ${${filters}%${(j:|:b)~overrides#-f}}

> Add (M) to the outer expansion if you want it the other way around

Same above.