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Re: Difference between true and : (and return 0)
- X-seq: zsh-users 4409
- From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
- To: Vincent Lefevre <vincent@xxxxxxxxxx>, zsh-users@xxxxxxxxxx
- Subject: Re: Difference between true and : (and return 0)
- Date: Sun, 21 Oct 2001 17:25:06 +0000
- In-reply-to: <4accd1af2avincent@xxxxxxxxxx>
- Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
- References: <4accd1af2avincent@xxxxxxxxxx>
On Oct 21, 9:38am, Vincent Lefevre wrote:
}
} What's the difference between 'true' and ':'?
There's no difference unless you setopt posix_builtins and combine them
with a parameter export. That is:
zsh% setopt posix_builtins
zsh% FOO=bar true
zsh% echo $FOO
zsh% FOO=bar :
zsh% echo $FOO
bar
zsh%
Other than that, `:' is implemented internally by calling `true'.
} At the end of a function, is there a difference between 'true', ':' and
} 'return 0'? What's the best solution?
As the very last command in a function, those three are equivalent. I'd
recommend `return 0' or `true' rather than `:' just because they make it
more obvious to a reader what you're doing. I'd use `return 0' myself,
as the most obvious of all.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
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