faithgaiciumia

function humanize(num){
  var ones = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine',
              'ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen',
              'seventeen', 'eighteen', 'nineteen'];
  var tens = ['', '', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty',
              'ninety'];

  var numString = num.toString();

  if (num < 0) throw new Error('Negative numbers are not supported.');