JAVASCRIPT

js array intersection object

const arr1 = [{ id: 1 }, { id: 2 }]
const arr2 = [{ id: 1 }, { id: 3 }]
const intersection = arr1.filter(item1 => arr2.some(item2 => item1.id === item2.id))
// intersection => [{ id: 1 }]

array intersection javascript es6

const intersection = (a, b) => {
  b = new Set(b); // recycling variable
  return [...new Set(a)].filter(e => b.has(e));
};

console.log(intersection([1, 2, 3, 1, 1], [1, 2, 4])); // Array [ 1, 2 ]

intersection array of object javascript

let data = [
    {
      id: "1",
      name: "test"
    },
    {
      id: "2",
      name: "test"
    }
  ];
  let data2 = [
    {
      id: "1",
      name: "test"
    },
    {
      id: "3",
      name: "test"
    }
  ];
  const result = data.filter((a) => data2.some((b) => a.id === b.id));
  console.log(result);