On 09/06/11 20:15, Jonathan M Davis wrote:
The save property of a forward range returns a copy of that range. In most
cases, since ranges are generally restructs, it just returns the range. You
use it when you want to save the original range and still be able pop elements
off.
auto orig = range.save;
//pop off as many elements from range as I want.
//orig still has all of its elements
The elements aren't copied however, just the range. Regardless, it has nothing
to do with returning an element from a range, so I don't understand your
question about returning an index rather than a whole object. Ranges don't
really use indicies. indexOf will tell you the index of a particular element,
and you can increment a counter every time you pop off an element if you want
to know how many elements you've consumed, but once an element has been popped
off, it's not part of that range anymore (though it could be part of a saved
range), so that could seriously affect by what you mean by index, depending on
what you're doing.
- Jonathan M Davis
I want to make it so that foreach works but I'm storing an array which
when changed, want to keep it like that, even after the foreach, I just
want to reset the index to 0
At the moment, I have to do:
foreach(i; 0..100)
...
lazy._n = 0;
foreach(i; 0..100)
...
I want to do:
foreach(n; lazy)
...
foreach(n; lazy)
...
Thanks,
Nebster
