Usage

Kingpin is run from the command line with player names and order of play specified as arguments:

$ java -jar kingpin-assembly-1.0.jar Roy Ernie Ishmael

Output

         |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |   10  | Total
---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+------
     Roy | 3 6 | X   | 7 2 |     |     |     |     |     |     |       |
         |   9 |  28 |  37 |     |     |     |     |     |     |       |    37
---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+------
   Ernie | X   | 4 / | 5   |     |     |     |     |     |     |       |
         |  20 |  35 |     |     |     |     |     |     |     |       |    35
---------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-------+------
 Ishmael | 9 / | X   |     |     |     |     |     |     |     |       |
         |  20 |     |     |     |     |     |     |     |     |       |    20

Ernie's turn (0 - 5 or '/' for all remaining pins):

Design

• Game logic is decoupled from the UI to facilitate reuse
• State machine modelled as case classes
• Scoring by recursive pattern matching
• Next game state and remaining pins computed via polymorphic dispatch
• No vars were mutated in the making of this programme!