js测试题

(function(){
return typeof arguments;
})();
"object"

var f = function g(){
return 23;
};
typeof g
"undefined"

(function(x){
delete x;
return x;
})(1);
1

var y = 1, x = y = typeof x;
x;
"undefined"

(function f(f){
return typeof f();
})(function(){ return 1; });
"number"

var foo = {
bar: function() {
return this.baz;
},
baz: 1
};
(function(){
return typeof arguments[0]();
})(foo.bar);
"undefined"

var foo = {
bar: function(){
return this.baz;
},
baz: 1
}
typeof (f = foo.bar)();
"undefined"

var f = (
function f(){
return "1";
},
function g(){
return 2;
}
)();
typeof f;
"number"

var x = 1;
if (function f(){}) {
x += typeof f;
}
x;
"1object"

var x = [typeof x, typeof y][1];
typeof typeof x;
"string"

(function(foo){
return typeof foo.bar;
})({ foo: { bar: 1 } });
"undefined"

(function f(){
function f(){ return 1; }
return f();
function f(){ return 2; }
})();
2

function f(){ return f; }
new f() instanceof f;
false

with (function(x, undefined){}) length;
2