From: Oliver Kiddle <okiddle@yahoo.co.uk>
To: sergio <mailbox@sergio.spb.ru>
Cc: zsh-users@zsh.org
Subject: Re: array prepend
Date: Sat, 12 Jan 2013 02:38:13 +0100 [thread overview]
Message-ID: <22417.1357954693@thecus.kiddle.eu> (raw)
In-Reply-To: <50EFB80D.30002@sergio.spb.ru>
serio wrote:
> Is there a way for prepend array like += for append,
> or the only possible solution is a = (b $a)?
a=(b $a)
is the only proper documented way to prepend elements
There are some hacks that do the job such as:
a[-1-$#a]=(b)
I'm not sure whether I'd rely on that always working in the future,
however.
If you dig out the mailing list discussion from when += was added you'll
see that the main reason there isn't a prepend is that we couldn't think
of suitable syntax that would be backward compatible. -= for example
isn't possible because a - character is valid in an identifier.
Oliver
next prev parent reply other threads:[~2013-01-12 1:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-11 6:58 sergio
2013-01-12 1:38 ` Oliver Kiddle [this message]
2013-01-13 18:51 ` Peter Stephenson
2013-01-14 4:48 ` rahul
2013-01-14 15:32 ` Bart Schaefer
2013-01-14 18:48 ` rahul
2013-01-17 4:34 ` Bart Schaefer
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