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

simplify answer above

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

array.map((element, index) => (index === array.length - 1) ? \`${element}.\` : \`${element},\`);