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To: zsh-workers@zsh.org
From: Stephane Chazelas <stephane.chazelas@gmail.com>
Subject: Re: Tip of the day: prune empty directory hierarchies
Date: Mon, 29 Jun 2015 16:43:50 +0100
Message-ID: <20150629154350.GB5362@chaz.gmail.com>
References: <20150629155927.289729cb__2821.95612458072$1435590676$gmane$org@pwslap01u.europe.root.pri>
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User-Agent: Mutt/1.5.21 (2010-09-15)

2015-06-29 15:59:27 +0100, Peter Stephenson:
[...]
> local -aU dirs
> 
> dirs=(**/*(ND/^F))
> while (( ${#dirs} )); do
>   rmdir $dirs || return
[...]

Missing -- above.

With GNU `find`:

find . -depth -type d -empty -delete

-- 
Stephane