I have an array of object like so:
let data = [{Date : null, id: null}, {Date : null, id: null}, {Date : null, id: null}]
And i need to assign every Date property a value. I did it with a loop
let dates = ['2022-01-01','2022-02-02','2020-02-03']
for (let i=0; i<dates.length; i++) {
data[i].Date = dates[i]
}
But i was wondering is it possible to do with one line? I was trying to use something like this, but it didn't work.
data.map((i)=>{
data[i].Date = dates[i]
})
Because i doenst hold index but a value.
Is it possible to use i as index iterator in map ?
map() creates a new array, if you want to alter data,
use forEach so you can get the current index to find the desired value in dates
data.forEach((d, i) => d.Date = dates[i]);
let data = [{Date : null, id: null}, {Date : null, id: null}, {Date : null, id: null}];
let dates = ['2022-01-01','2022-02-02','2020-02-03'];
data.forEach((d, i) => d.Date = dates[i]);
console.log(data);You can do it more functional, in a cleaner way by using map...
let data = [{Date : null, id: null}, {Date : null, id: null}, {Date : null, id: null}];
let dates = ['2022-01-01','2022-02-02','2020-02-03'];
const newData = data.map((a, i) => ({Date : dates[i], id : a.id}));
console.log(newData);