javascript - How to get the difference between to Arrays of Objects without IDs -


similar this question , this question, have array of objects want compare , difference between these two. sadly, objects not contain id (and @ state need call function, can't give id objects.).the examples linked above rely on using objects id comparison, can't use these solutions. arrays this:

var array1 = [{person1id: 46, person2id: 47, value: "test"}, {person1id: 38, person2id: 56, value: "test2"}]; var array2 = [{person1id: 46, person2id: 47, value: "test"}];

in example, object {person1id: 38, person2id: 56, value: "test2"}, in array1 not in array2.

is there way can compare 2 arrays , difference if objects in array not have id?

you use nested approach check every object of first array every object of second array, property wise.

function getdifference(array1, array2) {      var keys = ['person1id', 'person2id', 'value'];        return array1.filter(function (a) {          return !array2.some(function (b) {              return keys.every(function (k) {                  return a[k] === b[k];              });          });          });  }    console.log(getdifference(      [{person1id: 46, person2id: 47, value: "test"}, {person1id: 38, person2id: 56, value: "test2"}],      [{person1id: 46, person2id: 47, value: "test"}]  ));


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