example.js

function map(f a) { //missing a seperator here
function map(f, a) { //the correct line
  const result = new Array(a.length);
  for (let i = 0; i < a.length; i++) {
    result[i] = f(a[i]) //missing a line terminator/seperator
    result[i] = f(a[i]); //not missing it
  }
  return result;
}