fizzbuzz.js

#!/usr/bin/env node

// http://upfrontwichita.com/challenges/3

/**
 * fizzBuzz
 */
var fizzBuzz = function(low, high) {
  var result = [];

  if (typeof high === 'undefined') {

    if (low % 5 == 0 && low % 3 == 0) {
      result.push('fizzbuzz');
    } else if (low % 3 == 0) {
      result.push('fizz');
    } else if (low % 5 == 0) {
      result.push('buzz');
    } else {
      result.push(low);
    }

  } else {

    for (var i = low; i < high; i++) {

      var mThree = (i % 3) == 0
        , mFive = (i % 5) == 0
        , both = mThree && mFive;

      if (both) {
        result.push('fizzbuzz');
      } else if (mThree) {
        result.push('fizz');
      } else if (mFive) {
        result.push('buzz');
      } else {
        result.push(i);
      }
    }

  }
  
  return result;
};

module.exports = fizzBuzz;