[ILUG] Re: little sh question

[Kevin Lyda]

paul jakma asked me this today and i've often wanted to do similar things.
suddenly today i came up with an easier way then using expr.

On Tue, May 02, 2000 at 07:52:04PM +0100, Paul Jakma wrote:
> how do you do numerical expansion in sh/bash, ie
> 
> i want a for loop to iterate a variable through 001 to 254. In BASIC you
> can do something like:

adjust the argument to head accordingly:

for f in `yes "" | head -2 | cat -n|sed 's/ /0/g;s/.*\(....\)$/\1/'`; do
    echo $f
done

mmmmm.  damn that's sexy!

if you can live without the 001, 002, 003; and just settle on 1, 2, 3 then
it's a bit easier:

for f in `yes "" | head -2 | cat -n`; do
    echo $f
done

ah, any day that you can find yes useful is just great!

kevin