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优化filter

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This commit is contained in:
xing 2022-09-24 23:04:24 +08:00
parent bdfc171dec
commit acd695709c
1 changed files with 4 additions and 3 deletions
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7
helper/func.go
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@ -191,13 +191,14 @@ func SliceMap[T, R any](arr []T, fn func(T) R) []R {
} }
func SliceFilter[T any](arr []T, fn func(T) bool) []T { func SliceFilter[T any](arr []T, fn func(T) bool) []T {
var r []T j := 0
for _, t := range arr { for _, t := range arr {
if fn(t) { if fn(t) {
r = append(r, t) arr[j] = t
j++
} }
} }
return r return arr[:j]
} }
func SliceReduce[T, R any](arr []T, fn func(T, R) R, r R) R { func SliceReduce[T, R any](arr []T, fn func(T, R) R, r R) R {