fix：修复bug

utils/array.go

@@ -32,7 +32,7 @@ func InArray(search, needle interface{}) bool {
 			}
 		}
 		if _length%2 > 0 {
-			return val.Index(mid+1).Interface() == search
+			return val.Index(mid).Interface() == search
 		}
 	}
 	return false