Write code to convert back and forth between arabic numerals (e.g. 23)
and strings representing Roman numerals (e.g. "XXIII").
- Python
- Fork and clone this repository.
- Change into the new directory.
- Install all dependencies.
- Create and checkout a new branch to work on.
- Fulfill the listed requirements.
For reference:
| Language | Install Dependencies | Run Linter | Run Tests |
|---|---|---|---|
| JavaScript | npm install |
grunt nag |
grunt test |
| Ruby | bundle install |
rubocop |
rspec spec |
| Python | pip install -r ... |
pep8 |
mamba |
JavaScript, Ruby, and Python starter code is available in lib/challenge.js, lib/challenge.rb, and lib/challenge.py, respectively.
A pull request is not required, but it is necessary if you want a code review.
You may wish to refer to FAQs related to forking, cloning.
In either Ruby or JavaScript, implement arabic_to_roman (arabicToRoman in
JavaScript), a method/function that converts arabic numbers to strings of
characters representing roman numerals.
It's worth noting that in roman numerals, there is no way to represent either
zero, negative numbers, or fractions, so if the input is any of these (or any
other obviously invalid input), arabic_to_roman should return null/nil.
Once you've successfully met all requirements in your language of choice, implement that same solution in Python.
You should be running the appropriate linter before diagnosing any bugs, since linters find some of the most common sources of errors. After your linter passes, you should run the corresponding test command to run the included tests. Tests will tell you whether of not you've met these requirements.
Once you've implemented arabic_to_roman, implement the inverse method,
roman_to_arabic, in either Ruby of JavaScript.
As with arabic_to_roman, you'll need to do some input validation --
if your receive any strings that don't follow the rules of roman numerals
(e.g. no more than three of the same character in a row) or are otherwise
obviously invalid, return null/nil.
Also: be sure to set xdescribe to describe in your test file, so that
the tests for roman_to_arabic will also run.
Finally, do this process again in Python, un-hiding the appropriate tests in
challenge_spec.py.
Source code distributed under the MIT license. Text and other assets copyright General Assembly, Inc., all rights reserved.