<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>map</title>
</head>
<body>
<script>
const myMap = new Map();
myMap.set('html',85);
myMap.set('css',90);
myMap.set('js',75);
console.log(myMap);
</script>
<script>
console.log(myMap.get('js')); //75
</script>
<script>
myMap.delete('css');
</script>
<script>
console.log(myMap.has('css')); //false
</script>
<script>
console.log('----------------------------');
myMap.forEach(function(value, index, self){
console.log(index, value, self);
})
// myMap.entries().forEach(function(v,k,s){
// console.log(k,v,s);
// })
// error
console.log(myMap.entries());
for(const e of myMap.entries()){
console.log(e); // [key,value]로 묶어 출력
}
for(const e of myMap.entries()){
e.forEach(function(v, k){
console.log(k,v); // 하나씩 key - value - key - value순 출력
})
}
console.log(myMap.size); //2
console.log(myMap.keys());
// myMap.clear();
// console.log(myMap.size);
</script>
</body>
</html>
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