I just completed “Adapter Array” - Day 10 - Advent of Code 2020 in .

  • I was surprised to learn there’s no “count unique values” function in base Julia (equivalent to uniq -c in shell). The StatsBase downloadable package is needed for that.
  • How have I never used sort in Vim before?! I always thought I’d need to use the shell’s sort command since that’s the Unix-y way, but :sort n works like a charm.
  • One thing Advent of Code does better than other coding challenges is state the problem very clearly. Good examples, clear question text, and every assumption made explicit.
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