[removed] How can I swap elements of an array of objects (by reference, not index)?

Question

I have an array of objects a=[ {v:0}, {v:1}, {v:2}, {v:3} ] ;

I do not have the index into the array, but I do have references to

Answer 1

If you have the reference you can safely retrieve the index by Array.indexOf():

a.indexOf(myReference) // returns the index of the reference or -1

Then, with retrieved index, you can proceed as usual.

Like this:

let a = [{ v: 0 }, { v: 1 }, { v: 2 }, { v: 3 }];

const s1 = a[2];
const s2 = a[3];
console.log(a.indexOf(s1))