? ? 比较相似数据对象
?
console.table([{a:1,b:2,c:3},{a:"foo",b:false,c:undefined}]);
console.table([[1,2,3],[2,3,4]]);
function Person(firstName, lastName, age) {
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
var family = {};
family.mother = new Person("Susan", "Doyle", 32);
family.father = new Person("John", "Doyle", 33);
family.daughter = new Person("Lily", "Doyle", 5);
family.son = new Person("Mike", "Doyle", 8);
console.table(family, ["firstName", "lastName", "age"]);
?
console.time("Array initialize");
var array= new Array(1000000);
for (var i = array.length - 1; i >= 0; i--) {
array[i] = new Object();
};
console.timeEnd("Array initialize");
function login(user) {
console.count("Login called for user " + user);
}
users = [ // by last name since we have too many Pauls.
‘Irish‘,
‘Bakaus‘,
‘Kinlan‘
];
users.forEach(function(element, index, array) {
login(element);
});
login(users[0]);
?
原文：http://zhangzhaoaaa.iteye.com/blog/2248519