“Array Intersection JavaScript ES6” Code-Antworten

JS -Array -Intersektionsobjekt

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 }]
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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 ]
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