On Saturday, 11 September 2021 at 19:37:42 UTC, Vino wrote:
Hi All,
Request your help on the below to print the below array as
"Required output", Was able to get these values
"[1,2],[2,3],[3,4],[4,5]" by using list.slide(2), need your
help to get values "1,3],[1,4],[1,5],[2,4],[2,5],[3,5]"
auto list[] = [1,2,3,4,5]
Required output
[1,2],[2,3],[3,4],[4,5],[1,3],[1,4],[1,5],[2,4],[2,5],[3,5]
From,
Vino
I don't see the pattern just from the required output. If you
have an English description of what you want, it might be easier.
Anyway, take a look at
```d
unittest {
import std.algorithm : cartesianProduct, filter, map, sort;
import std.range : drop;
import std.array : array;
auto list = [1,2,3,4,5];
auto required =
[[1,2],[2,3],[3,4],[4,5],[1,3],[1,4],[1,5],[2,4],[2,5],[3,5]];
auto pairs = list.cartesianProduct(list.drop(1))
.filter!"a[0] < a[1]"
.map!array
.array;
assert(pairs == [[1, 2], [1, 3], [1, 4], [1, 5], [2, 3], [2,
4], [2, 5], [3, 4], [3, 5], [4, 5]]);
assert(required.sort.array == pairs);
}
```
