将多维数组转换为关联多维数组

// 原始多维数组
const multiArray = [
  [1, 'a'],
  [2, 'b'],
  [3, 'c']
];

// 转换为关联多维数组
const associativeArray = multiArray.reduce((acc, [key, value], index) => {
  acc[index] = { key, value };
  return acc;
}, {});

console.log(associativeArray);

{
  0: { key: 1, value: 'a' },
  1: { key: 2, value: 'b' },
  2: { key: 3, value: 'c' }
}

const multiArray = [
  [1, 'a'],
  [2, 'b'],
  [3] // 缺少一个元素
];

// 转换为关联多维数组
const associativeArray = multiArray.reduce((acc, [key, value = null], index) => {
  acc[index] = { key, value };
  return acc;
}, {});

console.log(associativeArray);

{
  0: { key: 1, value: 'a' },
  1: { key: 2, value: 'b' },
  2: { key: 3, value: null }
}