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独孤伶俜
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e71b83ef5d | |
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独孤伶俜
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7ea088b7e3 |
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@ -0,0 +1,45 @@
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package main
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import (
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"fmt"
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"sort"
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"strings"
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)
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func IsPalindrome(s sort.Interface) bool {
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for i, j := 0, s.Len()-1; i < j; i, j = i+1, j-1 {
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if s.Less(i, j) || s.Less(j, i) {
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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 StrToSlice(str string) []string {
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return strings.Split(str, "")
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}
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func IntToSlice(num int) []int {
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var s []int
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for num > 0 {
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s = append(s, num%10)
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num /= 10
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}
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return s
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}
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func main() {
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var str = "abcdcba"
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// 将字符串转为[]string
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s := StrToSlice(str)
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fmt.Println(str, ":", IsPalindrome(sort.StringSlice(s))) // abcdcba : true
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var num = 123321
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// 将数字转为[]int
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nums := IntToSlice(num)
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fmt.Println(num, ":", IsPalindrome(sort.IntSlice(nums))) // 123321 : true
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num = 123456
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nums = IntToSlice(num)
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fmt.Println(num, ":", IsPalindrome(sort.IntSlice(nums))) // 123456 : false
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}
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@ -1,6 +1,7 @@
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package main
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import (
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"Study/src/study/day9Interface/Practice/comm"
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"fmt"
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"reflect"
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"sort"
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@ -17,37 +18,10 @@ import (
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// 4. 实现点击一栏就对一栏排序
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// 1. 定义数据类型
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type Person struct {
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Name string
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Age int
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Sex bool
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ID int
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}
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type PersonSlice []Person
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// Less 没有实现sort.Interface的Less方法
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func (p PersonSlice) Less(i, j int, field string) bool {
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return PersonByField(p[i], p[j], field)
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}
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// PersonByField 按照字段排序
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func PersonByField(i, j Person, field string) bool {
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switch field {
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case "Name":
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return i.Name > j.Name
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case "Age":
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return i.Age < j.Age
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case "Sex":
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return i.Sex != j.Sex
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case "ID":
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return i.ID < j.ID
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}
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return false
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}
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func main() {
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// 构建数据
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data := PersonSlice{
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data := comm.PersonSlice{
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{"a", 1, true, 1},
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{"b", 2, false, 2},
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{"c", 3, true, 3},
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@ -0,0 +1,73 @@
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package main
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import (
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"Study/src/study/day9Interface/Practice/comm"
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"html/template"
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"log"
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"net/http"
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"os"
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"sort"
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)
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// 使用html/template包（§4.6）替代printTracks将tracks展示成一个HTML表格。
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// 将这个解决方案用在前一个练习中，让每次点击一个列的头部产生一个HTTP请求来排序这个表格。
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const TEMPL = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Document</title>
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</head>
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<body>
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<!--额加个边框吧-->
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<table border="1" cellspacing="0">
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<tr>
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<th><a href="/?sort=Name">Name</a></th>
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<th><a href="/?sort=Age">Age</a></th>
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<th><a href="./?sort=Sex">Sex</a></th>
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<th><a href="./?sort=ID">ID</a></th>
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</tr>
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{{range .}}
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<tr>
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<td>{{.Name}}</td>
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<td>{{.Age}}</td>
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<td>{{.Sex}}</td>
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<td>{{.ID}}</td>
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</tr>
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{{end}}
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</table>
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</body>
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</html>
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`
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func main() {
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// 构建数据
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data := comm.PersonSlice{
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{"a", 1, true, 1},
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{"b", 2, false, 2},
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{"c", 3, true, 3},
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{"d", 4, false, 4},
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{"e", 5, true, 5},
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{"f", 6, false, 6},
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{"g", 7, true, 7},
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}
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// 构建模版
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templ, err := template.New("test").Parse(TEMPL)
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if err != nil {
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log.Fatalln(err)
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}
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templ.Execute(os.Stdout, data)
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// 注册web
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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// 排序
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sort.Slice(data, func(i, j int) bool {
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// 获得sort参数
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return data.Less(i, j, r.FormValue("sort"))
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})
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// 输出
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templ.Execute(w, data)
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})
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// 监听
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http.ListenAndServe(":8080", nil)
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}
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@ -0,0 +1,30 @@
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package comm
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type Person struct {
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Name string
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Age int
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Sex bool
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ID int
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}
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type PersonSlice []Person
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// Less 没有实现sort.Interface的Less方法
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func (p PersonSlice) Less(i, j int, field string) bool {
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return PersonByField(p[i], p[j], field)
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}
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// PersonByField 按照字段排序
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func PersonByField(i, j Person, field string) bool {
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switch field {
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case "Name":
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return i.Name > j.Name
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case "Age":
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return i.Age < j.Age
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case "Sex":
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return i.Sex != j.Sex
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case "ID":
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return i.ID < j.ID
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}
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return false
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}
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