/*

手封MyMap并实现以下效果:

const map = new MyMap()
map.set("name","张三") 
map.set("age",20) 
map.set("gender","男") 

map.forEach(
    (value,key)=>console.log(key,value)
)//"name","张三" "age",20 "gender","男"

for(let entry of map.entries()){
    console.log(entry)
}//{key:"name",value:"张三"} {key:"age",value:20} {key:"gender",value:"男"}

console.log(map.size)//3
console.log(map.get("name"))//张三
console.log(map.get("age"))//20

console.log(map.has("name"))//true
console.log(map.has("myname"))//false

map.delete("age")
map.clear()
console.log(map.size)//0

*/

/*

实现闭包管理全班学生成绩

function score(name){
    //实现闭包内容
}
const stus = ["张三","李四","王五"...后面还有好几吨学生]
let name = "随便谁",key="随便什么学科",value=随便什么分数
设置任意学生的任意成绩
查询任意学生的全部成绩

*/

/*

全班人马排除空座位后抽取N名幸运观众

const stus = ["学生1","学生2",...] //共100名学生
const empties = [12,34,56,78]//空座位
let n = [1,96]以内的随机整数
console.log(pick(3))//["学生33","学生96","学生52"]
function pick(n){
    //实现业务逻辑
}

*/