• tcak (9/9) May 30 2015 I have never interested in "Range" topic till now, but with
• Philpax (5/14) May 30 2015 You take a copy of the range prior to iteration with the 'save'

"tcak" <tcak gmail.com> writes:

I have never interested in "Range" topic till now, but with 
Walter's presentation, I took a look at it today.

Ali has a nice lesson page about it 
(http://ddili.org/ders/d.en/ranges.html).

What I don't get is the mechanism to reset a range. I mean, you 
use a range with foreach, but then it is totally consumed. I 
cannot use it again. Because it will be empty. No special 
property function is defined for this. Maybe the reason I don't 
understand it is that it doesn't fit to my needs.

"Philpax" <me philpax.me> writes:

On Saturday, 30 May 2015 at 08:36:02 UTC, tcak wrote:
 I have never interested in "Range" topic till now, but with 
 Walter's presentation, I took a look at it today.

 Ali has a nice lesson page about it 
 (http://ddili.org/ders/d.en/ranges.html).

 What I don't get is the mechanism to reset a range. I mean, you 
 use a range with foreach, but then it is totally consumed. I 
 cannot use it again. Because it will be empty. No special 
 property function is defined for this. Maybe the reason I don't 
 understand it is that it doesn't fit to my needs.

You take a copy of the range prior to iteration with the 'save' 
method (which all forward ranges have: 
http://dlang.org/phobos/std_range_primitives.html#isForwardRange) 
if you need to reuse it.