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锁定老帖子 主题：考考你们的JS 我只作对了一半 你们试试
精华帖 (0) :: 良好帖 (11) :: 新手帖 (0) :: 隐藏帖 (15)
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发表时间：2011-05-19
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
</BODY>
</HTML>
<!--[if ie]>
<script>
var console = {};
console.log = function(text){
document.body.innerHTML += text+"<br/>";
}
</script>
<![endif]-->
<script>
console.log("typeof(NaN): "+typeof(NaN));
console.log("typeof(Infinity): "+typeof(Infinity));
console.log("typeof(null): "+typeof(null));
console.log("typeof(undefined): "+typeof(undefined));
console.log("(NaN==NaN): "+(NaN==NaN));
console.log("(NaN!=NaN): "+(NaN!=NaN));
console.log("(NaN>NaN): "+(NaN>NaN));
console.log("(null==undefined): "+(null==undefined));
console.log("(null>=undefined): "+(null>=undefined));
console.log("(null<=undefined): "+(null<=undefined));
console.log("null==null: "+(null==null));
console.log("(null!=null): "+(null!=null));
console.log("(null!=NaN): "+(null!=NaN));
console.log("(null==NaN): "+(null==NaN));
console.log("(NaN==undefined): "+(NaN==undefined));
console.log("(parseInt(\"123abc\")): "+(parseInt("123abc")));
console.log("(\"123abc\"-0): "+("123abc"-0));
console.log("Infinity>10: "+(Infinity>10));
console.log("Infinity>\"abc\": "+(Infinity>"abc"));
console.log("(Infinity==NaN): "+(Infinity==NaN));
console.log("(true==1): "+(true==1));
console.log("(new String(\"abc\")==\"abc\"): "+(new String("abc")=="abc"));
console.log("new String(\"abc\")===\"abc\": "+(new String("abc")==="abc"));
function step(a){
return function(x){
return x+a++;
}
}
var a = step(10);
var b = step(20);
console.log(" function step(a){ ");
console.log(" return function(x){ ");
console.log(" return x+a++; ");
console.log(" } ");
console.log(" } ");
console.log("var a = step(10); ");
console.log("var b = step(20);");
console.log("a(10): "+a(10));
console.log("b(20): "+b(20));
var a="123abc";
console.log("var a=\"123abc\";");
console.log("typeof(a++): "+typeof(a++));
console.log("a: "+a);
</script>
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发表时间：2011-06-02
这么全啊，以后肯定用得上
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