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From: Ignatius Reilly <turnbuckle@gmail.com>
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Subject: Passing array to function
Message-Id: <1A643BF6-28C9-483E-9312-D8C856D41F0D@gmail.com>
Date: Fri, 30 Sep 2016 02:15:55 -0500
To: zsh-users@zsh.org
X-Mailer: Apple Mail (2.3226)

I have the following function:

addtoarray() { [[ -d $1 ]] && myarray=($1 $myarray) }

which works as expected, prepending an element to an array only if its an
existing directory.  I'd like to rewrite this function so that I can pass
the array name as a parameter like so:

addtoarray /usr/foo myarray

but I can't figure out how.  I've tried everything I can think of without
any success.

Thanks