Lodash将数组转换为对象

Question

convert array to object the output should be same as key and value.

sample array:(my input structure)

var a = [1,2,3,4,5];

I need this structure of output:

{ 
  '1': 1,
  '2': 2,
  '3': 3,
  '4': 4,
  '5': 5
}

Answer 1

你不需要一个库，只需一个标准的reduce ：

let obj = [1,2,3,4,5].reduce((o,k)=>(o[k]=k,o), {})

Answer 2

Use lodash's _.keyBy() :

 const result = _.keyBy([1, 2, 3, 4, 5]); console.log(result); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script> 

Answer 3

You could map objects with same key and value, and assign all to an object.

 var array = [1, 2, 3, 4, 5], result = Object.assign({}, ...array.map(k => ({ [k]: k }))); console.log(result); 

Answer 4

I use reduce here

 const listToObject = list => list.reduce((obj, key) => { return { ...obj, [key]:key } }, {}) console.log(listToObject([1,2,3,4,5])) 

Answer 5

You can use Object.fromEntries() with Array.map() :

 var a = [1,2,3,4,5]; console.log( Object.fromEntries(a.map(v => [v, v])) )