gistfile1.js

{
  indexOf: function(arr, item) {

    var ret = -1, i;

    for(i=0; i<arr.length; i++) {
      if(arr[i] === item) {
        ret = i;
        break;
      }
    }

    return ret;
  },

  square : function(arr) {

    var x, i;

    for(i=0; i<arr.length; i++) {
      x = parseFloat(arr[i]);
      arr[i] = x * x;
    }

    return arr;

  },

  fizzBuzz : function(num) {
    // write a function that receives a number as its argument;
    // if the number is divisible by 3, the function should return 'fizz';
    // if the number is divisible by 5, the function should return 'buzz';
    // if the number is divisible the 3 and 5, the function should return
    // 'fizzbuzz';
    //
    // otherwise the function should return the number, or false if no number
    // was provided

    // This is a case when multiple returns is okay, it immediately returns us if we don't meet the requirements of this function
    // saving us from performing any additional computation.
    if(typeof num !== 'number') return false;

    var ret = '';

    if(num % 3 === 0) {
      ret += 'fizz';
    }

    if(num % 5 === 0) {
      ret += 'buzz';
    }

    if(ret === '') {
      ret = num;
    }

    return ret;
  }
}