Re: Brace expansion

[Chris F.A. Johnson]

On Sat, 4 Apr 2009, Ray Parrish wrote:

> I'm attempting to study Brace Expansion at the same named page at 
> bash-hackers.org and it states the following -
> Generate numbers with a prefix 001 002 ...
>
> Using a prefix:
>
> for i in 0{1..9} 10; do printf "%d\n" "$i";done
>
> However I am getting *this* output when running their command in Terminal In 
> Ubuntu 8.04
>
> ray@ray-desktop:~$ for i in 0{1..9} 10; do printf "%d\n" "$i";done
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> bash: printf: 08: invalid number
> 0
> bash: printf: 09: invalid number
> 0
> 10
>
> So... what gives???

    Numbers beginnig with 0 are required to be interpreted as octal
    numbers. 08 and 08 ar enot valid octal numbers.

for i in 0{1..9} 10; do printf "%02d\n" "$[i#0}";done

     Or:

printf "%02d\n" {1..10}

    Or, in bash4.0:

printf "%s\n" {01..10}


--
   Chris F.A. Johnson, webmaster         <http://woodbine-gerrard.com>
   ========= Do not reply to the From: address; use Reply-To: ========
   Author:
   Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)