Foo Bar: A playful attempt to implement the common foobar problem, using HOFs; without having to do an explicit check for the value `15`, nor `n % 3 === 0 && n % 5 === 0`

foobar.js

function getLabelForValue(n) {
  return function(divisor) {
    var labelMapping = {
      3: 'foo',
      5: 'bar'
    };
    if (n && n % divisor === 0 ) {
      return labelMapping[divisor];
    }
    return null;
  }
}

function fooBar(n) {
  for (let i = 1, max = n + 1; i < max; i++) {
    var labelForMultiplesOf3 = getLabelForValue(i)(3) || '';
    var labelForMultiplesOf5 = getLabelForValue(i)(5) || ''; 
    var res = `${labelForMultiplesOf3}${labelForMultiplesOf5}` || i;
    console.log(res);
  }
}

fooBar(50);