Converting arrays nested in array into object using forEch (does not work somehow?)

Question

I am having trouble with something i thought it will be simple.

I have an array of nested arrays with strings.

const cities = [['Vienna'],['Berlin'],['London'],['Oslo'],['New York']]

I must convert these nested arrays into objects. I think forEach method should suit perfectly along with Object.assign.

I written something like these:

function convert(element) {
    Object.assign({}, element)
  }
  const Test = cities.forEach(convert)

But then i am getting from console.log(Test) undefinded. Why so ? I am iterating through the whole array and each of her arrays should be assign as object. Whats missing ?

forEach always returns undefined. You might be looking for .map() but your convert does not return anything, either. — VLAZ
– VLAZ, Commented Apr 11, 2022 at 10:11

Rohìt Jíndal · Accepted Answer · 2022-04-11 10:20:17Z

1

Object should contain key: value pair

If you want to convert each string element into an object element. Then you can do something like this :

const cities = [['Vienna'],['Berlin'],['London'],['Oslo'],['New York']]

const res = cities.map((item) => {
    return {
    city: item[0]
  }
});

console.log(res);

edited Apr 11, 2022 at 10:20

answered Apr 11, 2022 at 10:11

Rohìt Jíndal

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3 Comments

cmgchess Over a year ago

is the flat necessary. map and item[0]?

Rohìt Jíndal Over a year ago

You are right. Sorry i missed that. Thanks for pointing that out. I updated the answer.

P H Over a year ago

Thanks, thats explain a lot. And its even simpler and straight forward.

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