Question

How to get the difference between two arrays of objects in JavaScript

Answer 1

function difference(array1, array2) {
  	return array1.filter(object1 => {
    		return !array2.some(object2 => {
      			return object1.id === object2.id;
    		});
  	});
}

const arr1 = [
  {id: 1, lang: 'javascript'},
  {id: 2, lang: 'python'},
  {id: 3, lang: 'c'}
];

const arr2 = [{id: 1, lang: 'javascript'}];

console.log(difference(arr1, arr2));





/*
run:

[{
  id: 2,
  lang: "python"
}, {
  id: 3,
  lang: "c"
}]

*/

 

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