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86 lines
3.7 KiB
Markdown
86 lines
3.7 KiB
Markdown
# Yacht
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# Score a single throw of dice in *Yacht*
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The dice game [Yacht](https://en.wikipedia.org/wiki/Yacht_(dice_game)) is from
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the same family as Poker Dice, Generala and particularly Yahtzee, of which it
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is a precursor. In the game, five dice are rolled and the result can be entered
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in any of twelve categories. The score of a throw of the dice depends on
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category chosen.
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## Scores in Yacht
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Category Score Example
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Ones 1 × number of ones 1 1 1 4 5 scores 3
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Twos 2 × number of twos 2 2 3 4 5 scores 4
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Threes 3 × number of threes 3 3 3 3 3 scores 15
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Fours 4 × number of fours 1 2 3 3 5 scores 0
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Fives 5 × number of fives 5 1 5 2 5 scores 15
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Sixes 6 × number of sixes 2 3 4 5 6 scores 6
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Full House Total of the dice 3 3 3 5 5 scores 19
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Four of a Kind Total of the four dice 4 4 4 4 6 scores 16
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Little Straight 30 points 1 2 3 4 5 scores 30
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Big Straight 30 points 2 3 4 5 6 scores 30
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Choice Sum of the dice 2 3 3 4 6 scores 18
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Yacht 50 points 4 4 4 4 4 scores 50
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If the dice do not satisfy the requirements of a category, the score is zero.
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If, for example, *Four Of A Kind* is entered in the *Yacht* category, zero
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points are scored. A *Yacht* scores zero if entered in the *Full House* category.
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## Task
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Given a list of values for five dice and a category, your solution should return
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the score of the dice for that category. If the dice do not satisfy the requirements
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of the category your solution should return 0. You can assume that five values
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will always be presented, and the value of each will be between one and six
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inclusively. You should not assume that the dice are ordered.
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## Exception messages
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Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to
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indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not
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every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include
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a message.
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To raise a message with an exception, just write it as an argument to the exception type. For example, instead of
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`raise Exception`, you should write:
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```python
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raise Exception("Meaningful message indicating the source of the error")
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```
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## Running the tests
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To run the tests, run the appropriate command below ([why they are different](https://github.com/pytest-dev/pytest/issues/1629#issue-161422224)):
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- Python 2.7: `py.test yacht_test.py`
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- Python 3.4+: `pytest yacht_test.py`
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Alternatively, you can tell Python to run the pytest module (allowing the same command to be used regardless of Python version):
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`python -m pytest yacht_test.py`
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### Common `pytest` options
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- `-v` : enable verbose output
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- `-x` : stop running tests on first failure
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- `--ff` : run failures from previous test before running other test cases
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For other options, see `python -m pytest -h`
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## Submitting Exercises
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Note that, when trying to submit an exercise, make sure the solution is in the `$EXERCISM_WORKSPACE/python/yacht` directory.
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You can find your Exercism workspace by running `exercism debug` and looking for the line that starts with `Workspace`.
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For more detailed information about running tests, code style and linting,
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please see [Running the Tests](http://exercism.io/tracks/python/tests).
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## Source
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James Kilfiger, using wikipedia [https://en.wikipedia.org/wiki/Yacht_(dice_game)](https://en.wikipedia.org/wiki/Yacht_(dice_game))
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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