Coding interview

User stories and problem description can be found here: https://github.com/testdouble/contributing-tests/wiki/Bank-OCR-kata

This code only works in isolation and it validated with unit tests. Run the following commands to see it in action! This code also uses ruby v2.7.0 as specified in the Gemfile. I suggest you use rvm to use this exact verison. (https://rvm.io/rvm/install)

gem install bundler
bundle install
rake

When you run rake right now, you will get some linting errors due to method and file length. The best place to start if you want to improve this project is to NOT disable the linter but instead to break the methods down into smaller chunks. One good way to do this might be to extract file validation to its own class and to break up some of the larger methods into smaller chunks.

If you want to use this code not only in tests but with "real" account numbers, you can run something like this in a ruby file:

require '../app/ocr'

ocr = Ocr.new "#{SAMPLE_FILE_PATH}/your_account_numbers_file.txt"
puts ocr.extract_numbers

Looking for solutions online...

Looks like the original problem comes from here: https://codingdojo.org/kata/BankOCR/

Solution by someone else and the critique of others: https://codereview.stackexchange.com/questions/128513/solution-for-the-bankocr-kata

OCR = Optical Character Recognition

• [ x ] Set up linter and basic test
• [ x ] run the tests and linter with rake

ERROR:

Fetching: bundler-2.1.4.gem (100%)
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory.

Solution:

You need to get permissions on the ruby directory. NOTE: (You will likely need to change the path from '/Library/Ruby/Gems/2.3.0' to the correct path on your machine.)

sudo chown $USER /Library/Ruby/Gems/2.3.0