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stat/combin: allow user allocation for Cartesian product

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Dan Kortschak
2019-10-24 19:27:42 +10:30
parent 7e1144f373
commit f54cad9e6d
3 changed files with 4 additions and 4 deletions
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4
stat/combin/combin.go
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@@ -341,8 +341,8 @@ func (g *CartesianGenerator) Next() bool {
// Product generates one product of the cartesian set according to the current index which is increased by Next().
// Next needs to be called at least one time before this method, otherwise it will panic.
func (g *CartesianGenerator) Product() []int {
return SubFor(nil, g.idx, g.lens)
func (g *CartesianGenerator) Product(dst []int) []int {
return SubFor(dst, g.idx, g.lens)
}
// IdxFor converts a multi-dimensional index into a linear index for a