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Design and Development Challenge – Bowling Score

Deploy Instructions

(Tim Sheils 1-31-2018)

This project was generated with Angular CLI version 1.6.6.

clone git repo and run npm install

Development server

Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

Build

Run ng build to build the project. The build artifacts will be stored in the dist/ directory. Use the -prod flag for a production build.

Running unit tests

Run ng test to execute the unit tests via Karma.

Running end-to-end tests

Run ng e2e to execute the end-to-end tests via Protractor.

Requirement

Create a program which, given a valid sequence of rolls for one line of American Ten-Pin Bowling, produces the total score for the game. Fork this repository, build your program in the language of your choice, then submit a pull request with your code.

Tasks which are out of scope

  • No need to check for valid rolls.
  • No need to check for correct number of rolls and frames.
  • No need to provide scores for intermediate frames.

Scoring Logic

  • Each game, or "line" of bowling, includes ten turns, or "frames" for the bowler.
  • In each frame, the bowler gets up to two tries to knock down all the pins.
  • If in two tries, he fails to knock them all down, his score for that frame is the total number of pins knocked down in his two tries.
  • If in two tries he knocks them all down, this is called a "spare" and his score for the frame is ten plus the number of pins knocked down on his next throw (in his next turn).
  • If on his first try in the frame he knocks down all the pins, this is called a "strike". His turn is over, and his score for the frame is ten plus the simple total of the pins knocked down in his next two rolls.
  • If he gets a spare or strike in the last (tenth) frame, the bowler gets to throw one or two more bonus balls, respectively. These bonus throws are taken as part of the same turn. If the bonus throws knock down all the pins, the process does not repeat: the bonus throws are only used to calculate the score of the final frame.
  • The game score is the total of all frame scores.

Validation Test Cases

Use the test cases from the table below to validate the scoring logic of your program. For program input, "X" indicates a strike, "/" indicates a spare, "-" indicates a miss, and a number indicates the number of pins knocked down in the roll.

Program Input Scoring Calculation Total Score
XXXXXXXXXXXX (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) + (10+10+10) 300
9-9-9-9-9-9-9-9-9-9- 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 90
5/5/5/5/5/5/5/5/5/5/5 (10+5) + (10+5) + (10+5) + (10+5) + (10+5) + (10+5) + (10+5) + (10+5) + (10+5) + (10+5) 150
X7/9-X-88/-6XXX81 (10+7+3) + (7+3+9) + 9 + (10+0+8) + 8 + (8+2+0) + 6 + (10+10+10) + (10+10+8) + (10+8+1) 167