from an array make an object with keys in the form of a name and values and return it

Question

i have a array banks and I need to return one object with all the parameters described below

const banks = [{kod: 723,name: "bank",},{kod: 929,name: "bank2"}]

i tried to do it with

const lookup = banks.map(item => {
  return ({[item.kod]: item.name }) 
})

but it returns the result [ {723: "bank"}, {929: "bank2"} ]

how can i achieve this result {723: "bank",929: "bank2"}

You can't do it with `.map()` because the whole point is to *map* elements of an existing array into elements of a new array. You can however use `.reduce()` as in the posted answer. — Pointy, Aug 08 '19 at 12:21

score 4 · Answer 1 · answered Aug 08 '19 at 12:20

4

You can use reduce instead

const banks = [{kod: 723,name: "bank",},{kod: 929,name: "bank2"}]

const lookup = banks.reduce((op,item) => {
  op[item.kod] =  item.name
  return op
},{})

console.log(lookup)

answered Aug 08 '19 at 12:20

Code Maniac

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oh, I completely forgot about the ```reduce``` method, thanks a lot – Sined4ik Aug 08 '19 at 12:23

score 2 · Answer 2 · answered Aug 08 '19 at 12:22

2

You could take the result and assign all parts to a new object.

const
    banks = [{ kod: 723, name: "bank" }, { kod: 929, name: "bank2" }],
    lookup = Object.assign({}, ...banks.map(({ kod, name }) => ({ [kod]: name })));

console.log(lookup);

answered Aug 08 '19 at 12:22

Nina Scholz

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score 2 · Accepted Answer · answered Aug 08 '19 at 12:22

2

You can use .reduce() with the spread syntax like so:

const banks = [{kod: 723,name: "bank",},{kod: 929,name: "bank2"}];

const res = banks.reduce((acc, {kod, name}) => ({...acc, [kod]: name}), {});
console.log(res);

answered Aug 08 '19 at 12:22

Nick Parsons

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from an array make an object with keys in the form of a name and values and return it

3 Answers3