<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JS iterable</title>
</head>
<body>
<!-- iterable类型，Array、Map和Set都属于iterable类型 具有iterable类型的集合可以通过新的for ... of循环来遍历-->
<script>
var a = ['a', 'b', 'c'];
var s = new Set(['A', 'B', 'C']);
var m = new Map([[1, 'x'], [2, 'y'], [3, 'z']]);
for (var x of a) { // 遍历Array
alert(x);
}
for (var x of s) { // 遍历Set
alert(x);
}
for (var x of m) { // 遍历Map
alert(x[0] + '=' + x[1]);
}
a.name='Hello';
for(var x in a){
alert(x);//‘0’，‘1’，‘2’，‘name’
}
for(var x of a){
alert(x);//'a','b','c'
}
s.forEach(function (element, sameElement, set) {//集合的forEach()函数
alert(element);
});
m.forEach(function (value, key, map) {//Map的forEach()函数
alert(value);
});
a.forEach(function (element) {//数组的forEach()函数
alert(element);
});
</script>
</body>
</html>
