kungfuant

'use strict';

const START_GAME_ID = 1580000;

const co    = require('co');
const wait  = require('co-wait');
const pg    = require('pg');
const cpg   = require('co-pg')(pg);

let databaseUrl = process.env.DATABASE_URL;

kungfuant

function binom(n,k) {
  k = Math.min(k, n - k);
  assert(k >= 0);

  var r = 1;
  for (var i = 0; i < k; ++i)
    r = (r * (n - i)) / (i + 1);
  return r;
}

kungfuant

data Bit = I | O
  deriving Show
type Bits = [Bit]

factorial :: Integer -> Integer
factorial 0 = 1
factorial n = n * factorial (n-1)

binom :: Integer -> Integer -> Integer

kungfuant

WITH t AS
  (SELECT
      user_id,
      (COALESCE(sum(cash_out - bet), 0::numeric)
        + COALESCE(sum(bonus), 0::numeric))::bigint AS gross_profit,
      (COALESCE(sum(cash_out), 0::numeric)
        + COALESCE(sum(bonus), 0::numeric)
        - COALESCE(sum(bet), 0::numeric))::bigint AS net_profit,
      COUNT(*) AS games_played
    FROM plays

kungfuant

var _ = require('lodash');

var a  = [0.2,0.1];
var b  = [10,30];
var a0 = 1 - _.reduce(a, function(s, n) { return s + n; });

function concave(x) {
  var result = a0 * Math.log(1 - x);
  for (var i = 0; i < a.length; ++i)
    result += a[i] * Math.log(1 + b[i] * x);

kungfuant

var fs       = require('fs');
var readline = require('readline');

var fp = process.argv[2];
var st = fs.createReadStream(fp, 'utf8');
var rl = readline.createInterface({input: st});

rl.on('line', function(line) {
    var fields = line.split(',');
    var id   = parseInt(fields[0]);

kungfuant

#!/usr/local/bin/gnuplot
reset
# set terminal png size 1280,600
# set output "moneypot-houseedge.png"
set terminal svg enhanced size 1920 1080
set output "moneypot-houseedge.svg"

set ylabel "house edge %"
set xlabel "cashout multiplier"

kungfuant

#!/usr/local/bin/gnuplot
reset
set terminal png size 1920,1200
set output "moneypot-wagered.png"

set title "MoneyPot - Wagered and profit"

set xlabel "Time"
set xtics 2592000 # 30 days in seconds

kungfuant

SELECT vs.* FROM
GENERATE_SERIES(1e6::bigint, (SELECT max(id) FROM games)) vs
LEFT JOIN games ON vs = games.id
WHERE games.id IS null;

kungfuant

#!/usr/local/bin/gnuplot
reset
set terminal png size 1920,1200
set output "moneypot-profit.png"

set xlabel "Time"
set ylabel "Profit"

set title "MoneyPot - Profit"
set xtics 2592000 # 30 days in seconds