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string_utils.go
79 lines (67 loc) · 1.65 KB
/
string_utils.go
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/*
* Copyright 2020 The Dragonfly 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 stringutils provides utilities supplementing the standard 'strings' package.
package stringutils
import (
"math/rand"
"strings"
"time"
"unicode"
)
func SubString(str string, start, end int) string {
runes := []rune(str)
length := len(runes)
if start < 0 || start >= length || end <= 0 || end > length || start >= end {
return ""
}
return string(runes[start:end])
}
func IsBlank(str string) bool {
for _, c := range str {
if !unicode.IsSpace(c) {
return false
}
}
return true
}
func IsEmpty(str string) bool {
return str == ""
}
func ContainsFold(slice []string, ele string) bool {
for _, one := range slice {
if strings.EqualFold(one, ele) {
return true
}
}
return false
}
func Contains(slice []string, ele string) bool {
for _, one := range slice {
if one == ele {
return true
}
}
return false
}
func RandString(len int) string {
r := rand.New(rand.NewSource(time.Now().UnixNano()))
bytes := make([]byte, len)
for i := 0; i < len; i++ {
b := r.Intn(26) + 65
bytes[i] = byte(b)
}
return string(bytes)
}