while true: !!!
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Mon Dec 18 07:36:27 EST 2000
On Mon, 18 Dec 2000, Steve Lamb wrote:
> On Mon, 18 Dec 2000 01:19:51 -0700, Blair Lowe <Blair.Lowe at compeng.net> wrote:
> >This is exactly what a python program should be NOT doing. "while 1"
> >is one of the most cryptic statements in Computer Science.
> Really? I think it is actually one of the most obvious. Esp. when one
> takes into consideration that you generally learn it once while learning how
> different people define their own way of doing an endless loop is a once per
> program experience.
Well, first of all, you have to understand that any value other than 0
evals to a true expression. Then, of course, it's clear that `while 1:'
means a endless loop. Anyway it's a very common idiom. But the point is
that using true and false would make the code more readable in cases where
it's not clear, that the value is used as a boolean value later. E.g:
# some code
exit = 0
# more code
exit = 1
# more code
I'd accept, that the variable exit itself helps to understand that it may
be uses as true or false, but it's no always that clear.
Carsten Geckeler: carsten dot geckeler at gmx dot de
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