56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// Copyright 2021 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package executor
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import (
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"strings"
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)
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// SetFromString constructs a slice of strings from a comma separated string.
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// It is assumed that there is no duplicated entry. You could use addToSet to maintain this property.
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// It is exported for tests. I HOPE YOU KNOW WHAT YOU ARE DOING.
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func SetFromString(value string) []string {
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if len(value) == 0 {
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return nil
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}
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return strings.Split(value, ",")
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}
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func setToString(set []string) string {
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return strings.Join(set, ",")
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}
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// addToSet add a value to the set, e.g:
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// addToSet("Select,Insert,Update", "Update") returns "Select,Insert,Update".
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func addToSet(set []string, value string) []string {
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for _, v := range set {
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if v == value {
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return set
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}
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}
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return append(set, value)
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}
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// deleteFromSet delete the value from the set, e.g:
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// deleteFromSet("Select,Insert,Update", "Update") returns "Select,Insert".
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func deleteFromSet(set []string, value string) []string {
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for i, v := range set {
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if v == value {
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copy(set[i:], set[i+1:])
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return set[:len(set)-1]
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}
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}
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return set
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}
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