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// Gulu - Golang common utilities for everyone.
// Copyright (c) 2019-present, b3log.org
//
// LianDi is licensed under Mulan PSL v2.
// You can use this software according to the terms and conditions of the Mulan PSL v2.
// You may obtain a copy of Mulan PSL v2 at:
// http://license.coscl.org.cn/MulanPSL2
// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
// See the Mulan PSL v2 for more details.
package gulu
import (
"math/rand"
"time"
)
// Ints returns a random integer array with the specified from, to and size.
func (*GuluRand) Ints(from, to, size int) []int {
if to-from < size {
size = to - from
}
var slice []int
for i := from; i < to; i++ {
slice = append(slice, i)
}
var ret []int
for i := 0; i < size; i++ {
idx := rand.Intn(len(slice))
ret = append(ret, slice[idx])
slice = append(slice[:idx], slice[idx+1:]...)
}
return ret
}
// String returns a random string ['a', 'z'] and ['0', '9'] in the specified length.
func (*GuluRand) String(length int) string {
rand.Seed(time.Now().UTC().UnixNano())
time.Sleep(time.Nanosecond)
letter := []rune("abcdefghijklmnopqrstuvwxyz0123456789")
b := make([]rune, length)
for i := range b {
b[i] = letter[rand.Intn(len(letter))]
}
return string(b)
}
// Int returns a random integer in range [min, max].
func (*GuluRand) Int(min int, max int) int {
rand.Seed(time.Now().UnixNano())
time.Sleep(time.Nanosecond)
return min + rand.Intn(max-min)
}
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