On Friday, 27 July 2012 at 13:10:46 UTC, Stuart wrote:
On Friday, 27 July 2012 at 03:00:25 UTC, Brad Anderson wrote:
D equivalent: iota(0, int.max, 2).map!(a => /* do something
with even numbers */)();
I think you're missing the point. The purpose isn't to generate
a sequence of numbers, but to illustrate how the Yield keyword
is used in VB.NET. Sure, getting a sequence of numbers may be
straightforward, but what about a lazy-populated list of all
files on a computer? That can be done using Yield - and more
importantly, WRITTEN like a normal synchronous function. Let's
see you do that with map.
You wouldn't use map for that, that would be silly.
Taking a look at DirIteratorImpl[1] in std.file suggest there is
a lot of setup to navigate the filesystem on Windows. How does
Yield help with that logic?
1.
https://github.com/D-Programming-Language/phobos/blob/master/std/file.d#L2397
Seriously I'll take my composing ranges over iterators any day.
