• =?UTF-8?B?Ik5vcmRsw7Z3Ig==?= (11/11) Sep 07 2015 Is there a range in Phobos for accessing all unordered
• cym13 (3/14) Sep 07 2015 There is an open bug for that
• =?UTF-8?B?Ik5vcmRsw7Z3Ig==?= (6/8) Sep 07 2015 Thanks.

=?UTF-8?B?Ik5vcmRsw7Z3Ig==?= <per.nordlow gmail.com> writes:

Is there a range in Phobos for accessing all unordered 
combinations of a range as:

foreach (const i, const a; r)
{
     for (auto j = i + 1; j < r.length; ++j)
     {
         const b = r[j];
         // Use a and b
     }
}

excluding self-pairs, that is i != j

"cym13" <cpicard openmailbox.org> writes:

On Monday, 7 September 2015 at 09:06:05 UTC, Nordlöw wrote:
 Is there a range in Phobos for accessing all unordered 
 combinations of a range as:

 foreach (const i, const a; r)
 {
     for (auto j = i + 1; j < r.length; ++j)
     {
         const b = r[j];
         // Use a and b
     }
 }

 excluding self-pairs, that is i != j

There is an open bug for that 
https://issues.dlang.org/show_bug.cgi?id=6788

=?UTF-8?B?Ik5vcmRsw7Z3Ig==?= <per.nordlow gmail.com> writes:

On Monday, 7 September 2015 at 09:12:53 UTC, cym13 wrote:
 There is an open bug for that 
 https://issues.dlang.org/show_bug.cgi?id=6788

Thanks.

So I construct a pairwise range with two implementation cases one 
for RandomAccessRange and one for InputRange

https://github.com/nordlow/justd/blob/master/combinations.d#L172

Should this go into Phobos?