将两个数组转换为一个对象

Question

我有父亲和孩子的名单：const fathers = [    'Bob',    'John',    'Ken',    'Steve'];const children = [    [ 'Mike', 'David', 'Emma' ],    [],    [ 'Harry' ],    [ 'Alice', 'Jennifer' ]];我怎样才能将它们转换为这样的对象：const relation = {    Bob: [ 'Mike', 'David', 'Emma' ],    John: [],    Ken: [ 'Harry' ],    Steve: [ 'Alice', 'Jennifer' ]};

Answer 1

使用Array.prototype.reduce，您可以将它们转换为对象，如下所示。

const fathers = [

    'Bob',

    'John',

    'Ken',

    'Steve'

];

const children = [

    [ 'Mike', 'David', 'Emma' ],

    [],

    [ 'Harry' ],

    [ 'Alice', 'Jennifer' ]

];

const output = fathers.reduce((acc, curV, curI) => ({ ...acc, [curV]: children[curI] }), {});

console.log(output);

Answer 2

const fathers = ['Bob', 'John', 'Ken', 'Steve'];

const children = [

  ['Mike', 'David', 'Emma'],

  [],

  ['Harry'],

  ['Alice', 'Jennifer']

];

const relation = {};

fathers.forEach((item, index) => {

  relation[item] = children[index];

});

console.log(relation);

Answer 3

2个解决方案：

第一个是声明一个空对象并使用循环遍历每个父对象。

第二种是使用减速机

var fathers = [

    'Bob',

    'John',

    'Ken',

    'Steve'

];

var children = [

    [ 'Mike', 'David', 'Emma' ],

    [],

    [ 'Harry' ],

    [ 'Alice', 'Jennifer' ]

];

// option 1

  var relations = {};

  fathers.forEach((father, idx) => relations[father] = children[idx])

  console.log(relations);

// option 2

  var relations2 = fathers.reduce((acc, father, idx) => {

      acc[father] = children[idx];

      return acc;

}, {}

)

  console.log(relations2 );