Day 2 Notes ------ Part1: ------ $ elixir day2part1.exs 414 Thoughts: Use a regex to parse the input Huh, can't iterate a string with Enum. Split into a list with String.graphemes/1 ------ Part2: ------ $ elixir day2part2.exs 413 Thoughts: Convert indices to be zero-based. No xor operator without importing Bitwise? Just write it manually. Initially misread the problem - thought first position must match, and second position must not match, which caused some confusion. Probably rebound to the same variable names a bit too much - should work on clearer variable names. After reading the elixir forum thread, String.at would have been fine for Part 2. https://elixirforum.com/t/advent-of-code-2020-day-2