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Re: ensure numeric comparison

From: Andrew J. Schorr
Subject: Re: ensure numeric comparison
Date: Thu, 26 May 2022 18:02:19 -0400
User-agent: Mutt/1.5.21 (2010-09-15)

On Thu, May 26, 2022 at 11:58:54AM -0500, Peng Yu wrote:
> When I say "empty string", I am referring to '' in bash. The input is
> an empty string in a line. But awk, once reading the input in,
> considers it as unassigned. So you did miss this case in the
> discussion. I just wanted to point it out.

I don't understand what you're saying. To repeat: there is a difference between
a variable that has been assigned a value of an empty string (a string that
contains zero characters) vs. a variable that has never been assigned any value
at all. Such variables will behave differently.  Please give an example of the
case that you are concerned about.


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