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Re: Strange bug in arithmetic function
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From: |
jellybean stonerfish |
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Subject: |
Re: Strange bug in arithmetic function |
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Date: |
Tue, 22 Feb 2011 15:57:23 +0000 (UTC) |
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User-agent: |
Pan/0.132 (Waxed in Black) |
On Mon, 21 Feb 2011 10:13:54 +0100, Marcel de Reuver wrote:
> In a bash script I use: $[`date --date='this week' +'%V'`%2] to see if
> the week number is even.
> Only in week 08 the error is: bash: 08: value too great for base (error
> token is "08") the same in week 09, all others are Ok...
>
> GNU bash, version 3.2.39(1)-release (i486-pc-linux-gnu) Copyright (C)
> 2007 Free Software Foundation, Inc.
>
> Running Ubutu 2.6.24-28 server
>From the bash manpage uhder ARITHMETIC EVALUATION
"Constants with a leading 0 are interpreted as octal numbers."
The digits 8 and 9 are invalid. Octal digits are 1,2,3,4,5,6,7,0
You can force base 10 by putting 10# before your numbers.