stringx.go

/*
 * TencentBlueKing is pleased to support the open source community by making
 * 蓝鲸智云-gopkg available.
 * Copyright (C) 2017-2022 THL A29 Limited, a Tencent company. All rights reserved.
 * Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://opensource.org/licenses/MIT
 * 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 stringx

import "math/rand"

// Truncate string to specific length
func Truncate(s string, n int) string {
	if n > len(s) {
		return s
	}
	return s[:n]
}


const letterBytes = "abcdefghijklmnopqrstuvwxyz1234567890"

// Random generate a random string with fixed length. [a-z0-9]
func Random(n int) string {
	b := make([]byte, n)
	for i := range b {
		b[i] = letterBytes[rand.Intn(len(letterBytes))]
	}
	return string(b)
}