labmem
d375463de5
- 将现有练习及 module 文件迁移至 go/practice，保持代码和依赖不变 - 新增 go/projects 项目区说明，更新目录约定与开发命令 BREAKING CHANGE: Go 练习命令需改在 go/practice 目录下执行
110 lines
2.0 KiB
Go
110 lines
2.0 KiB
Go
package testing
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import (
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"fmt"
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"sort"
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"testing"
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"time"
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)
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func TestNormal(t *testing.T) {
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numbers := map[int][]int{
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1: {8, 2, 4, 4},
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2: {0, 5, 3},
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3: {1},
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}
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for _, numbers := range numbers {
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middle := GetMiddNumber(numbers)
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t.Log(middle)
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}
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}
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func GetMiddNumber(numbers []int) float64 {
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sort.Ints(numbers)
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length := len(numbers)
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isOddNUmber := length%2 == 1
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if !isOddNUmber {
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return float64(numbers[length/2-1]+numbers[length/2]) / 2.0
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}
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return float64(numbers[length/2])
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}
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func TestChannel(t *testing.T) {
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var ball = make(chan string)
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kickBall := func(playerName string) {
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for {
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t.Log(<-ball, "传球", "\n")
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time.Sleep(time.Second)
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ball <- playerName
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}
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}
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go kickBall("张三")
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go kickBall("李四")
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go kickBall("王二麻子")
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go kickBall("刘大")
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ball <- "裁判" // 开球
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var c chan bool // 一个零值nil通道
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<-c // 永久阻塞在此
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}
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func TestFeature1(t *testing.T) {
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type Person struct {
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Sex string
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Name string
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}
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type Student struct {
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StudentID int
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Person
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}
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s1 := Student{
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StudentID: 1,
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Sex: "male",
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Name: "张三",
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}
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t.Log(s1)
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}
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func TestFeature2(t *testing.T) {
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// Go 1.27 之前：必须手动写出类型实参 [int]，否则编译报错
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fn1 := IntToString(FormatToString[int])
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fn2 := IntToString(FormatToString)
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oldFormat := []IntToString{FormatToString[int]}
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newFormat := []IntToString{FormatToString}
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t.Log(fn1(1))
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t.Log(fn2(2))
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for i, fn := range oldFormat {
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t.Log(fn(i))
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}
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for i, fn := range newFormat {
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t.Log(fn(i))
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}
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}
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// 一个泛型格式化函数
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func FormatToString[T any](v T) string {
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return fmt.Sprintf("value: %v", v)
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}
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// 具名函数类型：接收一个 int，返回 string
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type IntToString func(int) string
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func TestSort(t *testing.T) {
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slice := []int{8, 2, 4, 4}
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Sort1(slice)
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t.Log(slice)
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}
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func Sort1(slice []int) {
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for i := 0; i < len(slice)-1; i++ {
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for j := 0; j < len(slice)-1-i; j++ {
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if slice[j] > slice[j+1] {
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slice[j], slice[j+1] = slice[j+1], slice[j]
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}
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}
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}
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}
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