The application is a dividend calculator for a tote betting. The calculator supports three products with the following rules:
Punters must choose the winner of a race. Tabcorp takes a 15% commission from the Win pool. The remaining total is split, proportionally to stake, amongst punters who chose the correct winning horse.
Punters must choose the first, second or third place horse in a race. Tabcorp takes a 12% commission from the Place pool. The total pool is split evenly into 3 and each of these amounts is then split, proportionally to stake, amongst the punters who chose each placed horse
Punters must choose the first and second place runners in a race in the correct order. Tabcorp takes an 18% commission from the Exacta pool. The remaining total is split, proportionally to stake, amongst punters who chose the correct first and second horse in correct order. After a race has been run, Tabcorp publishes the dividends for each product. This is the return for a $1 stake for each paying selection in the race. All dividends are calculated to the nearest $0.01.
The format of bets is Bet:<product>:<selections>:<stake> , where
<product> is one of W , P , E, <selection> is either a single runner number (e.g. 4 ) for Win and Place, or two runner numbers (e.g. 4,3 ) for Exacta and Quinella and <stake> is an amount in whole dollars (e.g. 35 )
For example:
Bet:W:3:5 is a $5 bet on horse 3 to win
Bet:P:2:10 is a $10 bet on horse 2 to come first, second or third
Bet:E:5,7:15 is a $15 bet on horses 5 and 7 to come first and second in that order
Eventually, your program will receive the race results on stdin . You can assume this is the last input it will receive.
The format of the results is Result:<first>:<second>:<third> .
For example,
Result:5:3:8 represents a race where,
horse 5 finished first, horse 3 finished second and horse 8 finished third.
When bets have been placed and results provided, your program should generate the dividends for each product for a race. The dividends should be printed on stdout , in the following format:
<product>:<winningSelections>:<dividend> .
For example:
W:2:$2.61 # Win bet on horse 2 yields $2.61
P:2:$1.06 # Place bet on horse 2 yields $1.06
P:3:$1.27 # Place bet on horse 3 yields $1.27
P:1:$2.13 # Place bet on horse 1 yields $2.13
E:2,3:$2.43 # Exacta on horses 2,3 yields $2.43
Before beginning work, a developer must set up the development environment on their machine including the necessary tools and frameworks to support the development process. The environment requirements are noted below:
- Node.js - the application platform - download and run the Windows Installer (if using a different OS, download the appropriate installer). This will install the Node.js JavaScript platform and engine as well as the Node Package Manager (npm).
- Git - distributed version control system (DVCS) - download and install the Git client for Windows (if using a different OS, download the appropriate installer).
- GitHub - This solution uses GitHub to manage the source code. GitHub is a hosted SCM solution and it requires an authenticated account. You may use your own personal GitHub account.
- Node.js - application platform built on Chrome's JavaScript runtime
If the development dependencies have not been installed the first step should be to run npm install to set up the environment. From the developer's environment the entire test suite can be run by executing npm test from the project root folder. Running the tests in this manner will execute the script that is defined in the package.json file.
The Calculator can be run in the following 2 ways:
- Launch the Calculator Console to enter commands -
node app - Pass Commands from a file to the Calculator console -
node app -file SampleCommands.txt
Copyright © 2015 Sambaran Roy