js indexof多个

function findIndexesOfMultipleElements(arr, elementsToFind) {
  const indexes = {};
  for (const element of elementsToFind) {
    indexes[element] = arr.indexOf(element);
  }
  return indexes;
}

const myArray = [1, 2, 3, 4, 5, 2, 3];
const elements = [2, 3, 6];

const result = findIndexesOfMultipleElements(myArray, elements);
console.log(result); // 输出: {2: 1, 3: 2, 6: -1}

function findAllIndexes(arr, element) {
  const indexes = [];
  for (let i = 0; i < arr.length; i++) {
    if (arr[i] === element) {
      indexes.push(i);
    }
  }
  return indexes;
}

const allIndexesOfTwo = findAllIndexes(myArray, 2);
console.log(allIndexesOfTwo); // 输出: [1, 5]