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Use array at index instead of append as it is more efficient #58

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Use array at index instead of append as it is more efficient #58

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8 changes: 6 additions & 2 deletions maps/maps.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,10 @@ package maps
// The keys will be in an indeterminate order.
func Keys[M ~map[K]V, K comparable, V any](m M) []K {
r := make([]K, 0, len(m))
i := 0
for k := range m {
r = append(r, k)
r[i] =k
i++
}
return r
}
Expand All @@ -19,8 +21,10 @@ func Keys[M ~map[K]V, K comparable, V any](m M) []K {
// The values will be in an indeterminate order.
func Values[M ~map[K]V, K comparable, V any](m M) []V {
r := make([]V, 0, len(m))
i := 0
for _, v := range m {
r = append(r, v)
r[i] =v
i++
}
return r
}
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