go::常用库

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{1, 8, 38, 2, 348, 484}
sort.Ints(a[:])
index := sort.SearchInts(a[:], 348)

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('
')
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('
')
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
", len(os.Args))
for i, v := range os.Args {
    fmt.Printf("args[%d]=%s
", i, v)
}