这不是直接相关的，但我来这里寻找一个合并嵌套对象如一行

const nodes = {
    node1: {
        interfaces: {if1: {}, if2: {}}
    },
    node2: {
        interfaces: {if3: {}, if4: {}}
    },
    node3: {
        interfaces: {if5: {}, if6: {}}
    },
}

解决方案是结合使用reduce和对象扩展:

const allInterfaces = nodes => Object.keys(nodes).reduce((res, key) => ({...res, ...nodes[key].interfaces}), {})

import books from "./books.json";

export const getAllBooks = () => {
  return {
    data: books,
    // a=accoumulator, b=book (data itelf), i=index
    bookMap: books.reduce((a, book, i) => {
      // since we passed {} as initial data, initially a={}
      // {bookID1:book1, bookID2:i}
      a[book.id] = book;
      // you can add new property index
      a[book.id].index=i
      return a;
      // we are passing initial data structure
    }, {}),
  };
};

初始数组，并将转换为一个对象的键，这将是一个数组的唯一元素，键的值将是具体的键将重复多少次

var jsTechs = ['angular', 'react', 'ember', 'vanilaJS', 'ember', 'angular', 'react', 'ember', 'vanilaJS', 'angular', 'react', 'ember', 'vanilaJS', 'ember', 'angular', 'react', 'ember', 'vanilaJS', 'ember', 'angular', 'react', 'ember', 'vanilaJS', 'ember', 'react', 'react', 'vanilaJS', 'react', 'vanilaJS', 'vanilaJS'] var initialValue = { java : 4 } var reducerFunc = function reducerFunc (initObj, jsLib) { if (!initObj[jsLib]) { initObj[jsLib] = 1 } else { initObj[jsLib] += 1 } return initObj } var finalResult = jsTechs.reduce(reducerFunc, initialValue) console.log(finalResult)

一个快速而肮脏的问题:

var obj = {},
  arr = ['a','b','c'],
  l = arr.length; 

while( l && (obj[--l] = arr.pop() ) ){};

如果你正在使用jquery:

$.extend({}, ['a', 'b', 'c']);

如果你正在使用angularjs，你可以使用angular。Extend，与$的效果相同。jquery的扩展。

var newObj = {};
angular.extend(newObj, ['a','b','c']);