Adding an id number at the first index to an array of objects

Javascript

Now I made an array of objects in JavaScript.

I want to add and id number to each object in the array, at the first index [0]

Here is my code:

const allData= [
 { name: "Belly", age: 20 },
 { name: "Alfred", age: 58 },
 { name: "Sam", age: 10 },
]

for(const key in allData) {
 allData[key]['id'] = key;
}

console.log(allData);

The problem with this code is it returns the id as the last, not the first, index of each object.

Is there a way to acheive my goal?

Comments

Islam Zedan

13 Feb 2022

You can merge the current object with a new object contains the id so it goes in the first index

here is my Code :

const allData= [
 { name: "Belly", age: 20 },
 { name: "Alfred", age: 58 },
 { name: "Sam", age: 10 },
]

for(const key in allData) {
 allData[key] = Object.assign({id: key}, allData[key]);
}

console.log(allData);

and there is a fiddle link for it

//jsfiddle.net/pdzeu906/1/