Convert arrays of arrays to object with key

Question

I have arrays of arrays which contains something like this:

var values = [[1, 2, 3], [3, 2, 1]]

I've tried .map() and Object.assign but I dont know how to implement it. I want this as an output:

values = [
    {'up': 1, 'middle': 2, 'down': 3},
    {'up': 3, 'middle': 2, 'down': 1}
]

What should I use? This is what Im came up so far:

const object1 = [[1,2,3],[3,2,1]],
  object = []

object1.forEach(function(array) {
   object.map(value => ({'up': array[0], 'mid': array[1], 'down': array[2]}))
 });

console.log(object)

what is the expected output. always put 1st, 2nd or 3rd index or sort it first then arrange? — Farooq Ahmed Khan
– Farooq Ahmed Khan, Commented Oct 26, 2018 at 6:14

Amit · Accepted Answer · 2018-10-26 06:22:25Z

13

Not very different from what others already did, but a little more elegant:

let arr = [[1, 2, 3], [3, 2, 1]];

let result = arr.map(([up, middle, down]) => ({up, middle, down}));
console.log(result);

answered Oct 26, 2018 at 6:22

Amit

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1 Comment

JollyJoker Over a year ago

I'd say not only a little more elegant but so much simpler it's clearly the one correct way of doing this.

amrender singh · Accepted Answer · 2018-10-26 06:14:32Z

3

you can simply use Array.map(), there is no need of forEach()

let arr =[[1, 2, 3], [3, 2, 1]];

let result = arr.map((e)=>({"up" : e[0], "mid"  : e[1], "down" : e[2]}));
console.log(result);

answered Oct 26, 2018 at 6:14

amrender singh

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