Object.size = function(obj) {
    var size = 0, key;
    for (key in obj) {
        if (obj.hasOwnProperty(key)) size++;
    }
    return size;
};

function randomResultInArray (obj) {
    return obj[Math.floor(Math.random()*obj.length)];
}

function randomIndexInObject (obj) {
    return Math.floor( Math.random() * (Object.size(obj)-1) );
}

function capitalise(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}

function print(msg) {
    document.write(msg + "<br>");
}



/************* switch vs strategy *************/

/* switch (array) */

var fruitBasket = ["Oranges", "Apples", "Bananas", "Cherries"],
    fruitName = randomResultInArray(fruitBasket);

  switch (fruitName) {
   case "Oranges":
      print("Oranges are £0.59 a pound.");
      break;
   case "Apples":
      print("Apples are £0.32 a pound.");
      break;
   case "Bananas":
      print("Bananas are £0.48 a pound.");
      break;
   case "Cherries":
      print("Cherries are £3.00 a pound.");
      break;
}

/* strategy (obj) */

var stratFruitBasket = {
  oranges: "are £0.59 a pound.<br>",
  apples: "are £0.32 a pound.<br>",
  bananas: "are £0.48 a pound.<br>",
  cherries: "are £3.00 a pound.<br>"
};

var i = 0,
    randIndex = randomIndexInObject(stratFruitBasket);

$.each( stratFruitBasket, function( propertyName, fruitName ) {
  if (i == randIndex) {
    print(capitalise(propertyName) + " " + fruitName);
    return false;
  }
  i++;
});



/*
var cheeses = {
  cheddar: {
    complements: 'pickle',
    washDownWith: 'milk'
  },
  stilton: {
    complements: 'beetroot',
    washDownWith: 'port',
  }
};

$.each( cheeses, function( propertyName, cheese ) {
  $('<li>', {
    html: cheese.complements,
    id: propertyName
  }).appendTo( 'nav' );
});
*/