//文件名 subStr_test.go
package main

import (
?? ?"reflect"
?? ?"testing"
)
func BenchmarkSubStr(b *testing.B) {
?? ?for i := 0; i < b.N; i++ {
?? ??? ?res := subStr("qwe:qw:es:wqe", ":")
?? ??? ?if !reflect.DeepEqual(res, []string{"qwe", "qw", "es", "wqe"}) {
?? ??? ??? ?b.Errorf("不匹配")
?? ??? ?}
?? ?}

}

func benchmarkFib(b *testing.B, n int) {
?? ?for i := 0; i < b.N; i++ {
?? ??? ?Fib(n)
?? ?}
}

func BenchmarkFib5(b *testing.B) ?{ benchmarkFib(b, 5) }
func BenchmarkFib10(b *testing.B) { benchmarkFib(b, 10) }
func BenchmarkFib15(b *testing.B) { benchmarkFib(b, 15) }
func BenchmarkFib20(b *testing.B) { benchmarkFib(b, 20) }

//文件名 subStr.go
package main

import (
?? ?"fmt"
?? ?"strings"
)

func subStr(str, stre string) []string {
?? ?index := strings.Index(str, stre)
?? ?var theSub []string

?? ?for index >= 0 {
?? ??? ?// 先將分隔符前面的數(shù)據(jù)進(jìn)行保存
?? ??? ?temp := str[:index]
?? ??? ?// 將字符串往后移
?? ??? ?str = str[index+1:]
?? ??? ?// 重新獲取下標(biāo)
?? ??? ?index = strings.Index(str, stre)
?? ??? ?if temp != "" {
?? ??? ??? ?theSub = append(theSub, temp)
?? ??? ?} else {
?? ??? ??? ?continue
?? ??? ?}
?? ?}
?? ?theSub = append(theSub, str)
?? ?return theSub[:]
}

// 菲薄那契數(shù)列
func Fib(n int) int {
?? ?if n < 2 {
?? ??? ?return n
?? ?}
?? ?return Fib(n-1) + Fib(n-2)
}

func main() {
?? ?fmt.Println(subStr("q:w:ec:wer:cd:scn:cj:c:is:icc:cin:si", ":"))
?? ?fmt.Printf("%#v\n", subStr("q:w:ec:wer:cd:scn:cj:c:is:icc:cin:si", ":"))
?? ?fmt.Println(123)
}

package main

import (
?? ?"reflect"
?? ?"testing"
)

type testS struct {
?? ?str ?string
?? ?ste ?string
?? ?want []string
}

//進(jìn)行組測(cè)試,批量進(jìn)行測(cè)試，如果有哪個(gè)地方不滿足則進(jìn)行異常拋出
// func TestSubStr(t *testing.T) {
// ?? ?testMap := map[string]testS{
// ?? ??? ?"case_1": {"123:eqwe:123", ":", []string{"123", "eqwe", "123"}},
// ?? ??? ?"case_2": {"13:eqwe3:1@23", "3:", []string{"1", "eqwe", "1@23"}},
// ?? ??? ?"case_3": {"12@3@:@eq@we@:1@23", "@:", []string{"12@3", "@eq@we", "1@23"}},
// ?? ??? ?"case_4": {"123:eq@we:1@2@3", "q@", []string{"123:e", "we:1@2@3"}},
// ?? ??? ?"case_5": {"123:eqwe:123", "2", []string{"1", "3:eqwe:1", "3"}},
// ?? ??? ?"case_6": {"123:eqwe:123", "eqwe", []string{"123:", ":123"}},
// ?? ?}
// ?? ?for k, v := range testMap {
// ?? ??? ?res := subStr(v.str, v.ste)
// ?? ??? ?if !reflect.DeepEqual(res, v.want) {
// ?? ??? ??? ?t.Errorf("%v want:%#v got:%#v", k, v.want, res)
// ?? ??? ?}
// ?? ?}
// }

// 進(jìn)行子測(cè)試,可以針對(duì)某個(gè)子樣本進(jìn)行測(cè)試
func TestSubStr(t *testing.T) {
?? ?testMap := map[string]testS{
?? ??? ?"case_1": {"13:eqwe:123", ":", []string{"123", "eqwe", "123"}},
?? ??? ?"case_2": {"3:eqwe3:1@23", "3:", []string{"1", "eqwe", "1@23"}},
?? ??? ?"case_3": {"2@3@:@eq@we@:1@23", "@:", []string{"12@3", "@eq@we", "1@23"}},
?? ??? ?"case_4": {"123:eq@we:1@2@3", "q@", []string{"123:e", "we:1@2@3"}},
?? ??? ?"case_5": {"23:eqwe:123", "2", []string{"1", "3:eqwe:1", "3"}},
?? ??? ?"case_6": {"123:eqwe:123", "eqwe", []string{"123:", ":123"}},
?? ?}
?? ?for k, v := range testMap {
?? ??? ?t.Run(k, func(t *testing.T) {
?? ??? ??? ?res := subStr(v.str, v.ste)
?? ??? ??? ?if !reflect.DeepEqual(res, v.want) {
?? ??? ??? ??? ?t.Errorf("want:%#v got:%#v", v.want, res)
?? ??? ??? ?}
?? ??? ?})

?? ?}
}

package main

import (
?? ?"fmt"
?? ?"strings"
)

func subStr(str, stre string) []string {
?? ?index := strings.Index(str, stre)
?? ?var theSub []string

?? ?for index >= 0 {
?? ??? ?// 先將分隔符前面的數(shù)據(jù)進(jìn)行保存
?? ??? ?temp := str[:index]
?? ??? ?// 將字符串往后移
?? ??? ?str = str[index+len(stre):]
?? ??? ?// 重新獲取下標(biāo)
?? ??? ?index = strings.Index(str, stre)
?? ??? ?if temp != "" {
?? ??? ??? ?theSub = append(theSub, temp)
?? ??? ?} else {
?? ??? ??? ?continue
?? ??? ?}
?? ?}
?? ?theSub = append(theSub, str)
?? ?return theSub[:]
}

func main() {
?? ?fmt.Println(subStr("q:w:ec:wer:cd:scn:cj:c:is:icc:cin:si", ":c"))
?? ?fmt.Printf("%#v\n", subStr("q:w:ec:wer:cd:scn:cj:c:is:icc:cin:si", ":"))
?? ?fmt.Println(123)
}

（1）os.Args
package main1

import (
?? ?"fmt"
?? ?"os"
)

func main() {
?? ?// os.Args可以在執(zhí)行函數(shù)的時(shí)候傳遞參數(shù),但是對(duì)于-name=xxx沒(méi)有辦法將其解析
?? ?if os.Args != nil {
?? ??? ?for index, temp := range os.Args {
?? ??? ??? ?fmt.Println("第", index+1, "個(gè)參數(shù)是:", temp)
?? ??? ?}
?? ?}
?? ?fmt.Println("hello")
}

package main

import (
?? ?"flag"
?? ?"fmt"
?? ?"time"
)

func main() {
?? ?// 第一個(gè)參數(shù)為對(duì)應(yīng)的參數(shù),第二個(gè)參數(shù)為默認(rèn)值,第三個(gè)參數(shù)為提示
?? ?// 返回的是對(duì)應(yīng)類型的指針
?? ?// name := flag.String("name", "Tom", "輸入name")
?? ?// sex := flag.Bool("sex", true, "是不是男性")
?? ?// age := flag.Int("age", 10, "年齡")
?? ?// flag.Parse()
?? ?// fmt.Println(*name, *sex, *age)
?? ?var name string
?? ?var age int
?? ?var sex bool
?? ?flag.StringVar(&name, "name", "Tom", "輸入name")
?? ?flag.BoolVar(&sex, "sex", true, "是不是男性")
?? ?flag.IntVar(&age, "age", 10, "年齡")
?? ?tim := flag.Duration("time", time.Hour, "時(shí)間")
?? ?// 將輸入的數(shù)據(jù)進(jìn)行解析,不使用這句話的話不能獲取到name sex age等屬性對(duì)應(yīng)的值
?? ?flag.Parse()
?? ?fmt.Println(name, sex, age, *tim)
?? ?fmt.Println(flag.Args()) ?//以切片的方式返回命令行之外的其他參數(shù)
?? ?fmt.Println(flag.NArg()) ?//返回命令行之外的其他參數(shù)的個(gè)數(shù)
?? ?fmt.Println(flag.NFlag()) //返回使用命令行的參數(shù)的個(gè)數(shù)
}

package main

import (
?? ?"flag"
?? ?"fmt"
?? ?"os"
?? ?"runtime/pprof"
?? ?"time"
)
// 一段有問(wèn)題的代碼
func logicCode() {
?? ?var c chan int
?? ?for {
?? ??? ?select {
?? ??? ?case v := <-c:
?? ??? ??? ?fmt.Printf("recv from chan, value:%v\n", v)
?? ??? ?default:

?? ??? ?}
?? ?}
}

func main() {
?? ?var isCPUPprof bool
?? ?var isMemPprof bool
?? ?//獲取接收到的參數(shù)
?? ?flag.BoolVar(&isCPUPprof, "cpu", false, "turn cpu pprof on")
?? ?flag.BoolVar(&isMemPprof, "mem", false, "turn mem pprof on")
?? ?flag.Parse()
?? ?//判斷進(jìn)行什么測(cè)試,然后執(zhí)行分支,并將信息保存到相應(yīng)的文件內(nèi)。
?? ?if isCPUPprof {
?? ??? ?file, err := os.Create("./cpu.pprof")
?? ??? ?if err != nil {
?? ??? ??? ?fmt.Printf("create cpu pprof failed, err:%v\n", err)
?? ??? ??? ?return
?? ??? ?}
?? ??? ?pprof.StartCPUProfile(file)
?? ??? ?defer pprof.StopCPUProfile()
?? ?}
?? ?for i := 0; i < 8; i++ {
?? ??? ?go logicCode()
?? ?}
?? ?time.Sleep(20 * time.Second)
?? ?if isMemPprof {
?? ??? ?file, err := os.Create("./mem.pprof")
?? ??? ?if err != nil {
?? ??? ??? ?fmt.Printf("create mem pprof failed, err:%v\n", err)
?? ??? ??? ?return
?? ??? ?}
?? ??? ?pprof.WriteHeapProfile(file)
?? ??? ?file.Close()
?? ?}
}