sort 排序

var a = [...]string{"abc", "efg", "b", "A", "eeee"}

sort.Strings(a[:])

var a = [...]float64{2.3, 0.8, 28.2, 392342.2, 0.6}

sort.Float64s(a[:])

var a = [...]int{, , , , , }

sort.Ints(a[:])

index := sort.SearchInts(a[:], )

常用锁
var lock sync.Mutex

var rwLock sync.RWMutex

type Student struct {

    Name  string `json:"student_name"`

    Age   int    `json:"age"`

    Score int    `json:"score"`

}

json结构体转string

data, _ := json.Marshal(stu)

Sscanf 格式化输入

type student struct {

Name string

Age int

Score float32

}

func main() {

var str = "stu01 18 89.92"

var stu student

fmt.Sscanf(str, "%s %d %f", &stu.Name, &stu.Age, &stu.Score)

fmt.Println(stu)

}

获取终端输入

reader := bufio.NewReader(os.Stdin)

str, err := reader.ReadString('\n')

if err != nil {

    fmt.Println("read string failed, err:", err)

    return

}

读取文件

file, err := os.Open("C:/test.log")

if err != nil {

    fmt.Println("read file err:", err)

    return

}

defer file.Close()

reader := bufio.NewReader(file)

str, err := reader.ReadString('\n')

if err != nil {

    fmt.Println("read string failed, err:", err)

    return

}

获取终端输入参数

fmt.Printf("len of args:%d\n", len(os.Args))

for i, v := range os.Args {

    fmt.Printf("args[%d]=%s\n", i, v)

}