tidb helper 代码
文件路径：/util/table-filter/helper.go
/ Copyright 2021 PingCAP, Inc.
/
/ Licensed under the Apache License, Version 2.0 (the "License");
/ you may not use this file except in compliance with the License.
/ You may obtain a copy of the License at
/
/ http://www.apache.org/licenses/LICENSE-2.0
/
/ Unless required by applicable law or agreed to in writing, software
/ distributed under the License is distributed on an "AS IS" BASIS,
/ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/ See the License for the specific language governing permissions and
/ limitations under the License.
package filter
import "reflect"
/ reverse replace the contents of a slice with the same elements but in reverse order.
func reverse(items interface{}) {
n := reflect.ValueOf(items).Len()
swap := reflect.Swapper(items)
for i := n/2 - 1; i >= 0; i-- {
opp := n - 1 - i
swap(i, opp)
}
}