permutations

fnPermutations!Range permutations(Range)(Range r)

Lazily computes all _permutations of r using Heap's algorithm.

Parameters

Rangethe range type
rthe random access range to find the permutations for.

Returns

A forward range

of elements of which are an indexed view into r.

Note

The elements of the resulting range reuse the same internal buffer of

permutations, so each element is invalidated by popFront. If copies of intermediate permutations are desired, they need to be individually copied, such as using .map!(e => e.array) to save them in individual, independent arrays.

See Also

nextPermutation.