javascript - 检查 Javascript 对象是否包含与另一个对象相同的键/值对

Question

我有一些 Javascript 对象:

var first = {'key' : 1, 'data': 'Hello'};
var second = {'key' : 1, 'data': 'Hello', 'date': '15th'};

我想编写一个比较两者的函数，检查第一个对象中的键/值对是否与第二个对象相同。实现这一目标的最佳方法是什么？

checkIfObjectContains(first, second);
//This returns true, as all the key/value pairs in the 
//first object are within the second object.

checkIfObjectContains(second, first);
//This returns FALSE, as all the objects in the second object
//are NOT contained in the first.

function checkIfObjectContains(one, two){
    //What goes here?
}

Answer 1

我确实认为这对您的问题来说是一个很好的解决方案

function checkIfObjectContains(one, two){
   for (var i in one) {
           if (! two.hasOwnProperty(i) || one[i] !== two[i] ) {
              return false;
           }       
   }
   return true;
}