Re: assignment in if clause (was: alternate pattern for object initializers)

FROM : Hamish Allan
DATE : Mon May 26 20:40:41 2008

On Mon, May 26, 2008 at 7:06 PM, Stuart Malin <<email_removed>> wrote:

> Even though the double parens make clear that I had intended an assignment,
> it looks odd, and I can't recall ever seeing anything like this -- even in
> numerous example code snippets in the docs that use enumerators. So, my
> question is, is this double paren idiom good, or should I code such while
> loops in yet some other way?


The double-parens idiom is pretty standard, but:

while ((instance = [someEnumerator nextObject]) != 0)

is more explicit, or to avoid implicit return values from assignments
altogether and still keep it to a single statement:

for (instance = [someEnumerator nextObject]; instance != 0; instance =
[someEnumerator nextObject])

Hamish