I have the following object:
[
{ id: 1 },
{ id: 2 },
{ id: 3 }
]
And I wanna add a another array but just to the last array of the object, always (the first object length can change). So, it might look like this:
New array element:
{ name: "Hello Id 3" }
First object with the the second one appended:
[
{ id: 1 },
{ id: 2 },
{ id: 3, name: "Hello Id 3" }
]
Any ideas?
Thanks in advance!
Using Object.assign() is one way to merge properties of two objects
const data = [
{ id: 1 },
{ id: 2 },
{ id: 3 }
]
const obj = { name: "Hello Id 3" };
Object.assign( data[data.length-1], obj);
console.log(data)
You can use Array.length (-1) to find the index of the last object in the array and then add the elements of the new object to that:
let objs = [
{ id: 1 },
{ id: 2 },
{ id: 3 }
];
const name = { name: "Hello Id 3" };
const idx = objs.length - 1;
objs[idx] = { ...objs[idx], ...name };
console.log(objs);