Javascript Map Array Last Item

Question

I have this:

map = ranks.map((row, r) => (
  row.map((rank, i) => {
    return [element(r, i, state, rank, toggled, onClick)];
  })
));

Answer 1

const array = ['apple','orange','banana'];

array.map((element, index) => {
  //Last element
  if (index === array.length - 1) {
    return `${element}.`;
  }
  //Another elements
  return `${element}, `;
})}

Will return apple, orange, banana.