I have an array of objects -

const obj = [{name:'josh', city:'Sydney'},{name:'alice', city:'York'}]

I want to change 'city' property to 'town'. How can I make this change to the property of each object in the array?

I have an array of objects -

const obj = [{name:'josh', city:'Sydney'},{name:'alice', city:'York'}]

I want to change 'city' property to 'town'. How can I make this change to the property of each object in the array?

• javascript
• arrays

2 Answers 2

Using Array#map:

const arr = [ { name: 'josh', city: 'Sydney' }, { name: 'alice', city: 'York' } ];

const res = arr.map(({ city, ...e }) => ({ ...e, town: city }));

console.log(res);

Using Array#forEach:

const arr = [ { name: 'josh', city: 'Sydney' }, { name: 'alice', city: 'York' } ];

arr.forEach(e => {
  e.town = e.city;
  delete e.city;
});

console.log(arr);

You can't do this directly, but what you can do is this:

const obj = [{name:'josh', city:'Sydney'},{name:'alice', city:'York'}]
for (let element of obj){
  element.town = element.city;
  delete element.city;
}