package main

import (
	"fmt"
	"unicode/utf8"
)

func main() {
	array := []string{"a", "b", "c", "d", "e"}
	fmt.Println(array)
	for i := 0; i < len(array); i++ {
		fmt.Printf("数组索引: %d，对应值: %s\n", i, array[i])
	}
	for i, v := range array {
		fmt.Printf("数组索引: %d, 对应值: %s\n", i, v)
	}
	for _, v := range array {
		fmt.Printf("数组值: %s\n", v)
	}
	// 切片slice
	slice := array[2:4] // 包含索引2，不包含索引4
	fmt.Println(slice)
	slice1 := make([]string, 4)
	slice2 := make([]string, 4, 8)
	slice2 = append(slice1, "f")
	fmt.Println(slice2)
	// 映射map
	nameAgeMap := make(map[string]int)
	nameAgeMap["Snowfay"] = 20
	fmt.Println(nameAgeMap)
	age := nameAgeMap["Snowfay"]
	fmt.Println(age)
	age, ok := nameAgeMap["Snowfay"]
	if ok {
		fmt.Println(age)
	} else {
		fmt.Println(ok)
	}
	nameAgeMap["飞雪无情"] = 50
	fmt.Println(nameAgeMap)
	delete(nameAgeMap, "飞雪无情")
	fmt.Println(nameAgeMap)
	nameAgeMap["Hello"] = 22
	nameAgeMap["Allen"] = 33
	for k, v := range nameAgeMap {
		fmt.Println("Key is", k, "Value is", v)
	}
	fmt.Println(len(nameAgeMap))
	// string
	s := "Hello飞雪无情"
	bs := []byte(s)
	fmt.Println(bs)
	fmt.Println(s[0], s[1], s[15])
	fmt.Println(len(s))
	fmt.Println(utf8.RuneCountInString(s))
	for i, r := range s {
		fmt.Printf("%d %c\n", i, r)
	}
}