[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Why if test "xSTRING1= "xSTRING2" (the 'x') ?
|
From: |
Andreas Schwab |
|
Subject: |
Re: Why if test "xSTRING1= "xSTRING2" (the 'x') ? |
|
Date: |
Mon, 26 Mar 2007 15:50:02 +0200 |
|
User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.91 (gnu/linux) |
Keith MARSHALL <address@hidden> writes:
> Jules Colding wrote:
>> I'm wondering why I keep seeing the
>>
>> if test "xSTRING1" = "xSTRING2" ...
>
> The common idiom is `if test x$foo = xbar ...', and the `x' is
> a placeholder, in case $foo happens to expand to nothing.
If $foo happens to expand to multiple words this will fail as well.
Andreas.
--
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."