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

[L A Walsh]

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?