80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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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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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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*/
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// Package stringutils provides utilities supplementing the standard 'strings' package.
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package stringutils
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import (
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"math/rand"
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"strings"
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"time"
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"unicode"
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)
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func SubString(str string, start, end int) string {
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runes := []rune(str)
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length := len(runes)
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if start < 0 || start >= length || end <= 0 || end > length || start >= end {
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return ""
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}
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return string(runes[start:end])
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}
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func IsBlank(str string) bool {
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for _, c := range str {
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if !unicode.IsSpace(c) {
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return false
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}
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}
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return true
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}
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func IsEmpty(str string) bool {
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return str == ""
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}
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func ContainsFold(slice []string, ele string) bool {
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for _, one := range slice {
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if strings.EqualFold(one, ele) {
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return true
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}
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}
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return false
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}
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func Contains(slice []string, ele string) bool {
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for _, one := range slice {
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if one == ele {
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return true
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}
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}
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return false
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}
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func RandString(len int) string {
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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bytes := make([]byte, len)
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for i := 0; i < len; i++ {
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b := r.Intn(26) + 65
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bytes[i] = byte(b)
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}
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return string(bytes)
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}
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