[Issue 6788] std.range.pairwise?
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Thu Feb 7 10:03:34 PST 2013
http://d.puremagic.com/issues/show_bug.cgi?id=6788
bearophile_hugs at eml.cc changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|DUPLICATE |
--- Comment #3 from bearophile_hugs at eml.cc 2013-02-07 10:03:25 PST ---
(In reply to comment #2)
> This is the same as the cartesianProduct of two ranges, which is already
> checked into git HEAD.
>
> *** This issue has been marked as a duplicate of issue 7128 ***
See this test code:
import std.stdio, std.algorithm;
void main() {
auto data = [1, 2, 3, 4];
foreach (xy; cartesianProduct(data, data))
writeln(xy);
}
Tuple!(int, int)(1, 1)
Tuple!(int, int)(2, 1)
Tuple!(int, int)(3, 1)
Tuple!(int, int)(4, 1)
Tuple!(int, int)(1, 2)
Tuple!(int, int)(2, 2)
Tuple!(int, int)(3, 2)
Tuple!(int, int)(4, 2)
Tuple!(int, int)(1, 3)
Tuple!(int, int)(2, 3)
Tuple!(int, int)(3, 3)
Tuple!(int, int)(4, 3)
Tuple!(int, int)(1, 4)
Tuple!(int, int)(2, 4)
Tuple!(int, int)(3, 4)
Tuple!(int, int)(4, 4)
import std.stdio, std.range;
void main() {
auto data = [1, 2, 3, 4];
foreach (tup; pairwise(data))
writeln(tup);
}
Should print:
Tuple!(int,int)(1, 2)
Tuple!(int,int)(1, 3)
Tuple!(int,int)(1, 4)
Tuple!(int,int)(2, 3)
Tuple!(int,int)(2, 4)
Tuple!(int,int)(3, 4)
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