GO语言基础语法

切片与数组

type P struct {
	name     string
	password int
}

func main() {
	//p := [3]P{
	//	{"wqdi", 123},
	//	{"zhang", 123123},
	//	{"qina", 123123123},
	//}
	//
	//for i := range p {
	//	fmt.Println(p[i])
	//}

	p := make([]P, 3)
	p[0] = P{"zhang", 123}
	p[1] = P{"sun", 123123}
	p[2] = P{"wang", 123123123}
	for _, i := range p {
		fmt.Println(i)
	}
}

map

import "fmt"

func main() {
	//mp :=make([]string,3)
	mp := make(map[string]int)
	mp["one"] = 1
	mp["two"] = 2
	mp["three"] = 3
	fmt.Println(len(mp))

	//delete(mp, "one")
	//fmt.Println(mp["one"])

	r, ok := mp["one"]
	fmt.Print(r, ok)

	fmt.Println("===================")
	for i, t := range mp {
		fmt.Println(i, "  ", t)
	}
}

函数

import "fmt"

func add(a int, b int) int {
	return a + b
}

func add1(a string, b string) string {
	return a + b
}

func check(mp map[string]int, s string) (num int, f bool) {
	num, f = mp[s]
	return num, f
}

func main() {
	fmt.Println(add(1, 2))

	mp := make(map[string]int)
	mp["qwd"] = 1
	mp["qoif"] = 2
	mp["oiqmwd"] = 3

	val, ok := check(mp, "oiqmwd")
	fmt.Println(val, " ", ok)
}

结构体函数

type P struct {
	name     string
	password int
}

func (u *P) ch(name string, password int) (err error) {
	u.password = password
	u.name = name
	return err
}
func main() {
	p := make([]P, 5)
	p[0] = P{"zhang", 123}
	p[1] = P{"sun", 123123}
	p[2] = P{"wang", 123123123}
	p[3] = P{"yang", 123456}
	for _, i := range p {
		fmt.Println(i)
	}

	p[1].ch("AXTON", 347)
	for _, i := range p {
		fmt.Println(i)
	}
}

结构体切片排序

import (
	"fmt"
	"sort"
	"strconv"
)

type P struct {
	index int
	name  string
}

func main() {
	p := make([]P, 0)
	arr := []int{2, 4, 5, 6, 1, 3}
	for _, i := range arr {
		new := P{i, strconv.Itoa(i)}
		p = append(p, new)
	}

	sort.SliceStable(p, func(i int, j int) bool {
		return p[i].index < p[j].index
	})

	for _, i := range p {
		fmt.Println("name : ", i.index, " password : ", i.name)
	}
}