javascript - 从数组合并到对象后的Javascript

Question

const arrays = [
  [123, "string1"],
  [4564564, "string2"],
  [392341231, "string3"],
  [1665342, "String4", 334934543, "string5"]
];

const s = arrays.reduce((acc, val) => {
  return acc.concat(val);
});

// output: 
// [123, "string1", 4564564, "string2", 392341231, "string3", 1665342, "String4", 334934543, "string5"]

展平阵列后，输出是number一个string，我试图用它reduce来制作一个像

{
123: "string1",
4564564: "string2",
392341231: "string3",
1665342:  "String4",
334934543: "string5"
}

.reduce(function(acc, cur, i) {
  acc[cur] = cur;
  return acc;
}, {});

输出错误，如何分离number和string内部reduce？谢谢

标签： javascript

Answer 1

您可以通过映射各个索引并将它们全部分配给一个新对象来轻松地做到这一点，这将减少您对中间步骤的需求

const arrays = [
  [123, "string1"],
  [4564564, "string2"],
  [392341231, "string3"],
  [1665342, "String4", 334934543, "string5"]
];

console.log( Object.assign( {}, ...arrays.map( i => ({[i[0]]: i[1] }) ) ) );