//初始化Map的鍵和值，它們可以是任何類型,注意Map中所有的鍵或所有的值必須是相同類型
let nameList = new Map([
    ["key1", 1],
    ["key2", 2]
])
 
 //通過map.set設(shè)置鍵值對，返回該Map對象
nameList.set("key3", 3)
console.log(nameList)

//通過map.get獲取鍵對應(yīng)的值，如果不存在，則返回undefined
var getmap = nameList.get("key2")
var getmap2 = nameList.get("key999")
console.log(getmap)
console.log(getmap2)

//通過map.delete()刪除鍵值對,刪除則返回true，未刪除則返回false
var deletemap = nameList.delete("key2")
console.log(deletemap)
console.log(nameList)

//通過has()判斷 Map中是否包含所查找的鍵值，返回布爾型
var hasmap = nameList.has("key1")
var hasmap2 = nameList.has("key999")
console.log(hasmap)
console.log(hasmap2)

//通過clear()移除所有鍵值對，清楚Map
var clearmap = nameList.clear()
console.log(nameList)
 

let myMap = new Map()
myMap.set(0, "zero")
myMap.set(1, "one")

for (let [key, value] of myMap) {
  console.log(key, value)
}

let myMap = new Map()
myMap.set(0, "zero")
myMap.set(1, "one")

myMap.forEach((value, key) => {
  console.log(key, value)
})

let myMap = new Map()
myMap.set(0, "zero")
myMap.set(1, "one")

for (let key of myMap.keys()) {
  console.log(key)
}

let myMap = new Map()
myMap.set(0, "zero")
myMap.set(1, "one")

for (let value of myMap.values()) {
  console.log(value)
}

const map = new Map<string, number>();
map.set('apple', 1);
map.set('banana', 2);
map.set('orange', 3);

const dict = { 
  apple: 1,
  banana: 2,
  orange: 3,
};