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125 lines
2.4 KiB
125 lines
2.4 KiB
package util
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import (
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"math/rand"
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"path/filepath"
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"regexp"
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"strings"
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"time"
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)
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func init() {
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rand.Seed(time.Now().UnixNano())
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}
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// RandStringRunes 返回随机字符串
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func RandStringRunes(n int) string {
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var letterRunes = []rune("1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
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b := make([]rune, n)
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for i := range b {
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b[i] = letterRunes[rand.Intn(len(letterRunes))]
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}
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return string(b)
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}
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// ContainsUint 返回list中是否包含
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func ContainsUint(s []uint, e uint) bool {
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for _, a := range s {
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if a == e {
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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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// IsInExtensionList 返回文件的扩展名是否在给定的列表范围内
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func IsInExtensionList(extList []string, fileName string) bool {
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ext := strings.ToLower(filepath.Ext(fileName))
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// 无扩展名时
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if len(ext) == 0 {
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return false
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}
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if ContainsString(extList, ext[1:]) {
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return true
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}
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return false
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}
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// ContainsString 返回list中是否包含
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func ContainsString(s []string, e string) bool {
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for _, a := range s {
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if a == e {
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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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// Replace 根据替换表执行批量替换
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func Replace(table map[string]string, s string) string {
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for key, value := range table {
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s = strings.Replace(s, key, value, -1)
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}
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return s
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}
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// BuildRegexp 构建用于SQL查询用的多条件正则
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func BuildRegexp(search []string, prefix, suffix, condition string) string {
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var res string
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for key, value := range search {
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res += prefix + regexp.QuoteMeta(value) + suffix
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if key < len(search)-1 {
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res += condition
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}
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}
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return res
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}
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// BuildConcat 根据数据库类型构建字符串连接表达式
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func BuildConcat(str1, str2 string, DBType string) string {
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switch DBType {
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case "mysql":
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return "CONCAT(" + str1 + "," + str2 + ")"
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default:
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return str1 + "||" + str2
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}
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}
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// SliceIntersect 求两个切片交集
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func SliceIntersect(slice1, slice2 []string) []string {
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m := make(map[string]int)
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nn := make([]string, 0)
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for _, v := range slice1 {
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m[v]++
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}
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for _, v := range slice2 {
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times, _ := m[v]
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if times == 1 {
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nn = append(nn, v)
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}
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}
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return nn
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}
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// SliceDifference 求两个切片差集
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func SliceDifference(slice1, slice2 []string) []string {
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m := make(map[string]int)
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nn := make([]string, 0)
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inter := SliceIntersect(slice1, slice2)
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for _, v := range inter {
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m[v]++
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}
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for _, value := range slice1 {
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times, _ := m[value]
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if times == 0 {
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nn = append(nn, value)
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}
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}
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return nn
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}
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