优化字符串匹配

2021-03-12 13:53:06 +08:00 · 2021-03-12 13:53:06 +08:00 · c2bcab795d
commit c2bcab795d
parent 5cb1fa20d5
1 changed files with 4 additions and 3 deletions
--- a/json/build.go
+++ b/json/build.go
@ -217,11 +217,12 @@ func (dj *DynamicJSON) extraSliceIndex(key string) (bool, int) {
 		// slice 至少是 [1] 格式
 		return false, 0
 	}
-	// 不用正则,直接字符串处理
-	strByte := []byte(key)
-	if string(strByte[0:1]) != "[" || string(strByte[len(strByte)-1:]) != "]" {
+
+	if !strings.HasPrefix(key, "[") || !strings.HasSuffix(key, "]") {
 		return false, 0
 	}
+	// 不用正则,直接字符串处理
+	strByte := []byte(key)
 	index, err := strconv.Atoi(string(strByte[1 : len(strByte)-1]))
 	if nil != err {
 		return false, 0