The new std.process is ready for review

[Vladimir Panteleev]

On Tuesday, 26 February 2013 at 07:08:37 UTC, Lars T. Kyllingstad 
wrote:
> What if the variable is set, but empty?  Is that very different
> from the situation where it doesn't exist at all?  In my 
> opinion,
> when it comes to environment variables, no.

Until today, I didn't know that empty variables could exist. They 
don't exist on Windows: setting a variable to an empty string is 
how you delete it.

Regardless, I think my point still stands on the argument that 
it's much more likely for a variable to be unexpectedly unset 
rather than unexpectedly empty. To extend to a general case, we 
could say that an empty variable is as likely as any invalid or 
unexpected value. For the 'rm -rf $FOO/$BAR' case, one can come 
up with any combinations of FOO and BAR, such as "/bin" and 
"../", where the command would have the same effect.