<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js引用类型和基本类型、隐式类型转换以及强制类型转换面试题</title>
<style>
body{margin:0;padding:0;}
</style>
</head>
<body>
<script type="text/javascript">
"use strict";
var a = 1;
var b = {};
function show(x, y) {
x = 2;
y.num = 3;
}
show(a, b);
console.log(a,b); //1 {num:3}
if (null == undefined) {
console.log("1")
} else {
console.log("2")
} //1
console.log(Number(undefined)) //NaN
console.log(Number(null)) //0
</script>
</body>
</html>
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