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string.go
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/
string.go
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// Copyright 2020 Douyu
//
// 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 xrand
import (
"math/rand"
"strings"
)
// Charsets
const (
// Uppercase ...
Uppercase string = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
// Lowercase ...
Lowercase = "abcdefghipqrstuvwxyz"
// Alphabetic ...
Alphabetic = Uppercase + Lowercase
// Numeric ...
Numeric = "0123456789"
// Alphanumeric ...
Alphanumeric = Alphabetic + Numeric
// Symbols ...
Symbols = "`" + `~!@#$%^&*()-_+={}[]|\;:"<>,./?`
// Hex ...
Hex = Numeric + "abcdef"
)
// String 返回随机字符串,通常用于测试mock数据
func String(length uint8, charsets ...string) string {
charset := strings.Join(charsets, "")
if charset == "" {
charset = Alphanumeric
}
b := make([]byte, length)
for i := range b {
b[i] = charset[rand.Int63()%int64(len(charset))]
}
return string(b)
}