Francesco95it / pokerKata

Kata Exercise to find which hand wins in a poker match

Geek Repo:Geek Repo

Github PK Tool:Github PK Tool

Usage

	yarn install
	yarn start

Modify matches.txt to create new matches.

KATA Exercise

A code kata is an exercise in programming which helps programmers hone their skills through practice and repetition.

In 1999, the term was used by Dave Thomas, co-author of the book The Pragmatic Programmer,[1] in a bow to the Japanese concept of kata in the martial arts. The concept was implemented by Laurent Bossavit and Emmanuel Gaillot who talked about it at XP2005 in Sheffield (UK).[2] Following this conference, Robert C. Martin described the concept and initial usages in his article "The Programming Dojo"

[Wikipedia]

Poker Hands

Problem Description

Your job is to compare several pairs of poker hands and to indicate which, if either, has a higher rank.

Poker rules description

A poker deck contains 52 cards - each card has a suit which is one of clubs, diamonds, hearts, or spades (denoted C, D, H, and S in the input data). Each card also has a value which is one of 2, 3, 4, 5, 6, 7, 8, 9, 10, jack, queen, king, ace (denoted 2, 3, 4, 5, 6, 7, 8, 9, T, J, Q, K, A). For scoring purposes, the suits are unordered while the values are ordered as given above, with 2 being the lowest and ace the highest value.

A poker hand consists of 5 cards dealt from the deck. Poker hands are ranked by the following partial order from lowest to highest.

High Card: Hands which do not fit any higher category are ranked by the value of their highest card. If the highest cards have the same value, the hands are ranked by the next highest, and so on. Pair: 2 of the 5 cards in the hand have the same value. Hands which both contain a pair are ranked by the value of the cards forming the pair. If these values are the same, the hands are ranked by the values of the cards not forming the pair, in decreasing order. Two Pairs: The hand contains 2 different pairs. Hands which both contain 2 pairs are ranked by the value of their highest pair. Hands with the same highest pair are ranked by the value of their other pair. If these values are the same the hands are ranked by the value of the remaining card. Three of a Kind: Three of the cards in the hand have the same value. Hands which both contain three of a kind are ranked by the value of the 3 cards. Straight: Hand contains 5 cards with consecutive values. Hands which both contain a straight are ranked by their highest card. Flush: Hand contains 5 cards of the same suit. Hands which are both flushes are ranked using the rules for High Card. Full House: 3 cards of the same value, with the remaining 2 cards forming a pair. Ranked by the value of the 3 cards. Four of a kind: 4 cards with the same value. Ranked by the value of the 4 cards. Straight flush: 5 cards of the same suit with consecutive values. Ranked by the highest card in the hand. Clues

None as yet.

Suggested Test Cases
Sample input:
Black: 2H 3D 5S 9C KD  White: 2C 3H 4S 8C AH
Black: 2H 4S 4C 2D 4H  White: 2S 8S AS QS 3S
Black: 2H 3D 5S 9C KD  White: 2C 3H 4S 8C KH
Black: 2H 3D 5S 9C KD  White: 2D 3H 5C 9S KH

Each row of input is a game with two players. The first five cards belong to the player named “Black” and the second five cards belong to the player named “White”.

Sample output:
White wins. - with high card: Ace 
Black wins. - with full house: 4 over 2 
Black wins. - with high card: 9
Tie.
Rules
  • Use GIT is a MUST DO
  • Use project structure/tools/language you prefer to implement the solution
  • Add Unit Tests to cover your code (TDD approach is a nice to have)
  • The usage of design principles, OOP and design patterns is recommended

Enjoy :)

About

Kata Exercise to find which hand wins in a poker match


Languages

Language:JavaScript 100.0%