Advent of Code

This is my take on the 2020 Advent of Code using the GO language.

Each day of December is found under dec followed by the two-digit number of the day. A README contains a copy of the subject, the main file is also named after the day.

Story

The story starts December 1st. Links are available to turn pages and open new doors.

Quickstart

Prerequisites

You will need a functionning version of go. I'm using the latest to this day, which is 1.15.

The repo can be used without the make command, but it is highly recommanded.

Run

1. Checkout the project, then download vendors:

   make init
   

2. Run, giving the number of the day as parameter:

   make run -- 1
   

   or

   make build
   ./adventofcode.out -day 1
   

You can also run unit tests with coverage:

make test

What could be improved

• Most days are covered with a very minimal and nominal test case, using the example given by the subject. Corner cases should be covered.
• I took the liberty of a few [0] without checking the length of the slice. These occasions are systematically accompanied by a // todo. Given the importance of the code and the ungodly hour of the night, I can only hope that some day the will is there to correct this. Don't do this at home.
• The methods of the fileread package should probably ignore empty lines (December 4: no). A lot of shortcuts are made here, as the inputs are totally under control. Error management could use some consolidation.
• Some doors' code tends to reside in the func given as parameter to readAndApply. I would like to find a way to pull these out for unit testing and readbility.
• I am particularly not proud of the quality found in Dec 7th. The comments look like the Dune planet and the naming is Lewis Carollesque.