Splitting variable into two numbers

[lisa-asket]

The multi-input is always enclosed within braces with no whitespaces.



Thus "{5,8}", "{13,21}"



In general input is "{p,q}" with no whitespaces



Nothing more than that.



Then p=5; q=8 and p=13; q=21



From: Greg Wooledge <greg@wooledge.org>
To: help-bash@gnu.org
Subject: Re: Splitting variable into two numbers
Date: 20/07/2021 19:05:01 Europe/Paris

On Tue, Jul 20, 2021 at 06:15:32PM +0200, lisa-asket@perso.be wrote:
> I would like to split a variable containing two numbers delimited by a comma 
> 
> and transfer the two numbers into two variables p and q.

p=${input%,*} q=${input#*,}

> Input:
> 
> var="{5,8}"

STOP!

All of a sudden, this is an X-Y problem. You don't have "two numbers
delimited by a comma". You have something else entirely. There are
curly braces now. I wonder what else is in there.

Is it really JSON?

What's the *actual* goal here? Where does this input come from, what
does it *really* look like (before any mangling you've already done
on the X-Y path), and what are you trying to do with it?