underscore tutorial - Lottery DataBase Analysis

simple underscore.js projects, walk through, & tutorial

Lottery DataBase Analysis - 06 (_.reduce)

California Lucky for Life (832)

Prizes	Odds 1 in	Total # of Winners	Prizes Claimed	Prizes Available
$3,250,000	2,400,000	17	11	6
$5,000	1,200,000	34	22	12
$1,000	400,000	102	65	37
$500	12,000	3,400	2,239	1,161
$100	645	63,240	41,624	21,616
$40	350	116,620	76,812	39,808
$20	53	765,000	498,167	266,833
$15	40	1,020,000	668,467	351,533
$10	20	2,040,000	1,325,571	714,429
$5	11	3,570,000	2,287,131	1,282,869
Ticket	10	4,080,000	2,524,475	1,555,525

    // prizeAmounts, value of winnings
    var prizeAmounts = _.pluck(game832Data, "Prizes");
    prizeAmounts = _.map(prizeAmounts, function(n){return n.replace(/Ticket/g, "$5");});
    prizeAmounts = _.map(prizeAmounts, function(n){return n.replace(/\$/g, "");});
    prizeAmounts = _.map(prizeAmounts, function(n){return parseInt(n.replace(/,/g,""),10);});
    document.getElementById('outputOne').innerHTML = _.map(prizeAmounts, function(n){return ' ' + n;});

var prizeAmounts =

1 Nada Yet

    //Payout Per prizeAmount type
    //var payoutPerPrizeAmount = _.zip(numWin, prizeAmounts);
    var ppPrize = _.zip(numWin, prizeAmounts);
    var payoutPerPrizeAmount = _.map(ppPrize,
        function(passedArray){
            return passedArray[0] * passedArray[1];
        });
    document.getElementById('outputTwo').innerHTML = _.map(payoutPerPrizeAmount, function(n){return ' ' + n;});

Payout Per Prize Amount = :

2 Nada Yet

    //Total Payout
    var totalMoneyOut = _.reduce(payoutPerPrizeAmount, function(start, num){return start + num;});
    document.getElementById('outputThree').innerHTML = "Total Amount of Prizes Paid Out = $" + totalMoneyOut;

3 Nada Yet

    //Total Price of All Tickets
    // 5 = ticket price, magic Number
    var costAllTicketsInGame = totalPlays[0] * 5;
    var tempFourForOutput = "Total Cost of All Tickets in Game = $" + costAllTicketsInGame;
    document.getElementById('outputFour').innerHTML = tempFourForOutput;

4 Nada Yet

    // Payout Percentage
    var payoutRatio = totalMoneyOut/costAllTicketsInGame
    document.getElementById('outputFive').innerHTML = payoutRatio;

5 Nada Yet

Rumor is (or so I have heard, perhaps incorrectly) that the payout percentage in Vegas is mandated by law at 80% (for slots and the like), so 77% seems spot on to me and quite favorable. I had thought the lottery set the payout Percentage at 50%, so if I am wrong it that, maybe the value varies from game to game. And if so, that will be a good stat to track and carry forward. With that in mind, it's probably time to start working on a consistent output (end of page summary), perhaps with graphs and whatnot. Perhaps...

Please Note: I am an idiot. No seriously. The odds of my gambling odds calculations being correct are likely on par with my odds of ever winning. You have been warned.