add GetLongestCommonPrefixLength func

model/object.go

@@ -152,3 +152,19 @@ func getConstantsKeyByLength(inputLen int) string {
 		return constants.RedisAllGridSetKey
 	}
 }
+
+// GetLongestCommonPrefixLength define func of get longest common prefix length between two strings
+func GetLongestCommonPrefixLength(s1 string, s2 string) int {
+	// TODO 增加对特殊字符串例如 "" 的处理
+	minLen := len(s1)
+	if len(s2) < minLen {
+		minLen = len(s2)
+	}
+
+	for i := 0; i < minLen; i++ {
+		if s1[i] != s2[i] {
+			return i
+		}
+	}
+	return minLen
+}