Formatting number into a string representation.

tok.js

Handlebars.registerHelper('toK', function(number) {
  number = number+'';
  if (number < 1000) {
    return number;
  } else if (number < 10000) {
    return number.charAt(0) + ',' + number.substring(1);
  } else {
    return (number/1000).toFixed(number % 1000 != 0)+'k';
  }
});