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Pre-allocate slice in generic Map function

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Jonathan Wilsson
2024-02-28 21:02:30 +01:00
parent 4cbe087f02
commit ce7330a252
1 changed files with 3 additions and 1 deletions
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iteration.go
+3 -1
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@@ -37,8 +37,10 @@ func (s *Selection) Map(f func(int, *Selection) string) (result []string) {
// Map is the generic version of Selection.Map, allowing any type to be // Map is the generic version of Selection.Map, allowing any type to be
// returned. // returned.
func Map[E any](s *Selection, f func(int, *Selection) E) (result []E) { func Map[E any](s *Selection, f func(int, *Selection) E) (result []E) {
result = make([]E, len(s.Nodes))
for i, n := range s.Nodes { for i, n := range s.Nodes {
result = append(result, f(i, newSingleSelection(n, s.document))) result[i] = f(i, newSingleSelection(n, s.document))
} }
return result return result