arothuis / aoc2020

Advent of Code 2020

See: https://adventofcode.com/2020

Purpose

1. Finish the daily exercises in JavaScript
2. Apply a declarative style as much as possible (escape hatches allowed)
3. Decompose into small, testable functions
4. Extensively test the implementation, preferably using Test-Driven Development (red, green, refactor)

Declarative JavaScript

• Prefer functions and expressions over statements and statefulness
• Fall back to a more imperative style if we run into JavaScript's limitations (recursion depth, etc.) or declarativity is too inconvenient for current or future puzzles
• Prefer const over let (no re-assignability)
• Although more declarative, the use of the comma operator is discouraged as the resulting variable scoping is problematic