[xubuntu-users] dash - looping through alphabet

[Kevin O'Gorman]

How about
i=1; while [ $i -lt 27 ] ; do  echo -n $( echo abcdefghijklmnopqrstuvwxyz |
cut -c$i); i=$(( i+1 )); done; echo

For me, it echoes the alphabet on one line.
It does use  cut(1) as an external command, but at least cut is POSIX.




On Sat, Jul 5, 2014 at 2:04 PM, Ralf Mardorf <ralf.mardorf at rocketmail.com>
wrote:

> Hi,
>
> since /bin/sh on *buntu usually is dash, my request might not be OT for
> this list. Unfortunately I didn't find an answer in the
> Internet.
>
> What's the syntax for a loop from "a" to "z" in dash?
>
> $ cat for-bash
> #!/bin/bash
> for str in {a..z} ; do printf "$str"; done
> printf "\n"
> exit
>
> $ cat for-dash
> #!/bin/dash
> for str in {a..z} ; do printf "$str"; done
> printf "\n"
> exit
>
> $ ./for-bash
> abcdefghijklmnopqrstuvwxyz
> $ ./for-dash
> {a..z}
>
> Regards,
> Ralf
>
>
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-- 
Kevin O'Gorman

programmer, n. an organism that transmutes caffeine into software.
Please consider the environment before printing this email.
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