isEqual

_.isEqual(object, other)
执行两个对象之间的优化深度比较，确定他们是否应被视为相等。

var stooge = {name: 'moe', luckyNumbers: [13, 27, 34]};

var clone = {name: 'moe', luckyNumbers: [13, 27, 34]};

stooge == clone;

=> false

_.isEqual(stooge, clone);

=> true