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Re: Not operator (~) fail on arithmetic expansion.

From: L A Walsh
Subject: Re: Not operator (~) fail on arithmetic expansion.
Date: Sun, 27 Nov 2016 21:54:59 -0800
User-agent: Thunderbird

John McKown wrote:
Not replying for Chet, who will have the definitive answer, I will say that I, personally, think that is working as designed. ~ 0 (with space between) is definitely the "not" operator. But without the middle space, ~0, where there is a white space character in front of the tilde, looks to me like the normal "get the home directory for the following id" .

Does ~ get home dirs for UID's?  I thought it only worked
for usernames?  I would think that allowing user names that were
all numeric would be confusing for software that accept either UID's or
usernames.  Can usernames even begin with a number?

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