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?
Add a comment |
2 Answers
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);3 Comments
p4avinash
Is there any way to modify the key in place..?? I mean without creating another array...??
Pointy
@p4avinash it is not possible to change a property name, but you can add a new property with the same value and
delete the old one.
Majed Badawi
@p4avinash I updated the answer with another approach
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; } 