来自多个数组值的Javascript匹配

const array1 = [1, 2, 3, 4];
const array2 = [3, 4, 5, 6];

const matches = array1.filter(value => array2.includes(value));
console.log(matches); // 输出: [3, 4]

const array1 = [1, 2, 3, 4];
const array2 = [3, 4, 5, 6];

const set1 = new Set(array1);
const matches = [...array2].filter(value => set1.has(value));
console.log(matches); // 输出: [3, 4]

const array1 = [1, 2, 3, 4];
const array2 = [3, 4, 5, 6];

const matches = array1.reduce((acc, value) => {
  if (array2.includes(value)) {
    acc.push(value);
  }
  return acc;
}, []);
console.log(matches); // 输出: [3, 4]

const array1 = [1, 2, 3, 4];
const array2 = [3, 4, 5, 6];
const matches = [];

for (let i = 0; i < array1.length; i++) {
  for (let j = 0; j < array2.length; j++) {
    if (array1[i] === array2[j]) {
      matches.push(array1[i]);
    }
  }
}
console.log(matches); // 输出: [3, 4]

const array1 = [1, 2, 3, 4];
const array2 = [3, 4, 5, 6];

const set2 = new Set(array2);
const matches = array1.filter(value => set2.has(value));
console.log(matches); // 输出: [3, 4]

function flattenArray(array) {
  return array.reduce((acc, value) => {
    if (Array.isArray(value)) {
      acc.push(...flattenArray(value));
    } else {
      acc.push(value);
    }
    return acc;
  }, []);
}

const array1 = [1, [2, 3], 4];
const array2 = [3, [4, 5], 6];

const flatArray1 = flattenArray(array1);
const flatArray2 = flattenArray(array2);

const matches = flatArray1.filter(value => flatArray2.includes(value));
console.log(matches); // 输出: [3, 4]