mirror of
https://gitee.com/johng/gf
synced 2026-07-06 13:42:46 +08:00
123 lines
2.6 KiB
Go
123 lines
2.6 KiB
Go
// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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// 字符串操作.
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package gstr
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import "strings"
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// 字符串替换
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func Replace(origin, search, replace string) string {
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return strings.Replace(origin, search, replace, -1)
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}
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// 使用map进行字符串替换
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func ReplaceByMap(origin string, replaces map[string]string) string {
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result := origin
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for k, v := range replaces {
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result = strings.Replace(result, k, v, -1)
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}
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return result
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}
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// 字符串转换为小写
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func ToLower(s string) string {
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return strings.ToLower(s)
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}
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// 字符串转换为大写
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func ToUpper(s string) string {
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return strings.ToUpper(s)
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}
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// 字符串首字母转换为大写
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func UcFirst(s string) string {
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if len(s) == 0 {
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return s
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}
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if IsLetterLower(s[0]) {
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return string(s[0] - 32) + s[1 :]
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}
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return s
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}
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// 字符串首字母转换为小写
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func LcFirst(s string) string {
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if len(s) == 0 {
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return s
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}
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if IsLetterUpper(s[0]) {
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return string(s[0] + 32) + s[1 :]
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}
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return s
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}
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// 便利数组查找字符串索引位置，如果不存在则返回-1，使用完整遍历查找
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func SearchArray (a []string, s string) int {
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for i, v := range a {
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if s == v {
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return i
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}
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}
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return -1
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}
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// 判断字符串是否在数组中
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func InArray (a []string, s string) bool {
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return SearchArray(a, s) != -1
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}
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// 判断给定字符是否小写
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func IsLetterLower(b byte) bool {
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if b >= byte('a') && b <= byte('z') {
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return true
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}
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return false
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}
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// 判断给定字符是否大写
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func IsLetterUpper(b byte) bool {
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if b >= byte('A') && b <= byte('Z') {
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return true
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}
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return false
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}
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// 判断锁给字符串是否为数字
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func IsNumeric(s string) bool {
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for i := 0; i < len(s); i++ {
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if s[i] < byte('0') || s[i] > byte('9') {
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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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// 字符串截取，支持中文
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func SubStr(str string, start int, length...int) (substr string) {
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// 将字符串的转换成[]rune
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rs := []rune(str)
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lth := len(rs)
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// 简单的越界判断
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if start < 0 {
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start = 0
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}
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if start >= lth {
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start = lth
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}
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end := lth
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if len(length) > 0 {
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end = start + length[0]
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if end < start {
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end = lth
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}
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}
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if end > lth {
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end = lth
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}
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// 返回子串
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return string(rs[start : end])
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} |