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Re: No tilde expansion right after a quotation
From: |
Paul Jarc |
Subject: |
Re: No tilde expansion right after a quotation |
Date: |
Sun, 15 Feb 2009 20:01:15 -0500 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.1 (gnu/linux) |
"Angel Tsankov" <fn42551@fmi.uni-sofia.bg> wrote:
> How do you know that $# is always set? And what about $@? To what values
> are these parameters set outside any function?
$# gives the number of positional parameters. If there aren't any
positional parameters, then it's set to 0. In the man page, under
PARAMETERS, Special Parameters, you'll find:
# Expands to the number of positional parameters in decimal.
Note that it doesn't say "while a function is being executed" or "when
some positional parameters are set". That variable is always set, as
are the others listed under Special Parameters.
Positional parameters can be used outside of functions:
set foo bar; echo $# $@
bash -c 'echo $0; echo $# $@' arg-zero foo bar
> A more appropriate parameter to use could be $? which, by pure logic, seems
> to be at least as often set as is $#.
They're both always set; pick whichever one you like.
paul
- Re: No tilde expansion right after a quotation, (continued)
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/15
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/15
- Re: No tilde expansion right after a quotation, Paul Jarc, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/15
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation, Paul Jarc, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/15
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation,
Paul Jarc <=
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation, Paul Jarc, 2009/02/15
- Re: No tilde expansion right after a quotation, Jon Seymour, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/15
- Re: No tilde expansion right after a quotation, Eric Blake, 2009/02/15
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/16
- Re: No tilde expansion right after a quotation, Dave B, 2009/02/16
- Re: No tilde expansion right after a quotation, Angel Tsankov, 2009/02/16
- Re: No tilde expansion right after a quotation, Eric Blake, 2009/02/16
- Re: No tilde expansion right after a quotation, Chet Ramey, 2009/02/16