window.Objectのfalseのようなtrueの話 ref: http://qiita.com/butchi_y/items/0167ff91124c2f9bea2d

q-1.js

({}) !== ({}); // == ?

q-2.js

var a = {};
var b = {};
a[window] = 5;
b[window] = 5;
a[window] === b[window]; // == ?

q-3.js

var obj = {};
var obj = {};
obj[window] = 5;
obj.window = 3;
obj[window] !== obj.window; // == ?

q-4.js

var a = {};
var b = {};
a[{}] = 5;
b[{}] = 5;
a[{}] === b[{}] // == ?

q-5.js

!!(new Boolean(0)) // == ?

q-6.js

var obj1 = {a:5,b:3,c:8};
var obj2 = {b:3,a:5,c:8};

var keys1 = '';
var keys2 = '';

var i;
for(i in obj1) {
  keys1 += i;
}

for(i in obj2) {
  keys2 += i;
}

keys1 !== keys2 // == ?