From acd695709cea53de03ab002dc7c1eb97c378ecf7 Mon Sep 17 00:00:00 2001
From: xing <fthvgb1>
Date: Sat, 24 Sep 2022 23:04:24 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96filter?=
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---
 helper/func.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/helper/func.go b/helper/func.go
index 2d36e0d..ef6e0a5 100644
--- a/helper/func.go
+++ b/helper/func.go
@@ -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 {
-	var r []T
+	j := 0
 	for _, t := range arr {
 		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 {