JavaScript 关联数组比较

Question

我想我有三个数组:

dict['tag'] = 'INPUT';
dict['type'] = 'checkbox';
dict['name'] = 'remember'

dict2['tag'] = 'INPUT2';
dict2['type'] = 'checkbox';
dict2['name'] = 'remember';

dict3['type'] = 'checkboxEdit';
dict3['name'] = 'remember'
dict3['tag'] = 'INPUT3';

现在我想要实现的是，即使数组未排序，我也想知道数组中有多少元素相等，例如

function(dict, dict2) return 2 //cause input values are not the same
function(dict, dict3) return 1 //cause name values are the same
function(dict2, dict3) return 1 //cause name values are the same

实现这一目标最有效的方法是什么？数据结构也可以改变，所以如果有更好的东西，请告诉我。

Answer 1

其实很简单..

var dict = {}, dict2 = {}, dict3 = {};

dict['tag'] = 'INPUT';
dict['type'] = 'checkbox';
dict['name'] = 'remember'

dict2['tag'] = 'INPUT2';
dict2['type'] = 'checkbox';
dict2['name'] = 'remember';

dict3['type'] = 'checkboxEdit';
dict3['name'] = 'remember'
dict3['tag'] = 'INPUT3';

function compare(d1, d2) {
  var count = 0;
  Object.keys(d1).forEach(function (k) {
      if(d1[k] === d2[k]) count++;
  });
  return count;
}

alert(compare(dict, dict2));
alert(compare(dict, dict3));
alert(compare(dict2, dict3));