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pkg/stringutil/rand.go
52 строки
1 KB
Jes Cok
all: stop using math/rand.Seed
20 авг 2023, 11:34
20 авг 2023, 11:34
52748f6
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// Copyright 2018 The etcd Authors // // 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 stringutil import ( "math/rand" ) // UniqueStrings returns a slice of randomly generated unique strings. func UniqueStrings(slen uint, n int) (ss []string) { exist := make(map[string]struct{}) ss = make([]string, 0, n) for len(ss) < n { s := RandString(slen) if _, ok := exist[s]; !ok { ss = append(ss, s) exist[s] = struct{}{} } } return ss } // RandomStrings returns a slice of randomly generated strings. func RandomStrings(slen uint, n int) (ss []string) { ss = make([]string, 0, n) for i := 0; i < n; i++ { ss = append(ss, RandString(slen)) } return ss } const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" func RandString(l uint) string { s := make([]byte, l) for i := 0; i < int(l); i++ { s[i] = chars[rand.Intn(len(chars))] } return string(s) }