Advent of Code 2019

Jeremy W. Sherman

Let's go with Nim this year.

Getting Started

Install choosenim with the latest stable and the toolchain:

> curl https://nim-lang.org/choosenim/init.sh -sSf | sh

choosenim-init: Downloading choosenim-0.4.0_macosx_amd64
    Prompt: Can choosenim record and send anonymised telemetry data? [y/n]
        ... Anonymous aggregate user analytics allow us to prioritise
        ... fixes and features based on how, where and when people use Nim.
        ... For more details see: https://goo.gl/NzUEPf.
    Answer: y
Downloading Nim 1.0.4 from nim-lang.org
[##################################################] 100.0% 0kb/s
 Extracting nim-1.0.4.tar.gz
   Building Nim 1.0.4
   Building tools (nimble, nimgrep, nimpretty, nimsuggest)
  Installed component 'nim'
  Installed component 'nimble'
  Installed component 'nimgrep'
  Installed component 'nimpretty'
  Installed component 'nimsuggest'
   Switched to Nim 1.0.4
choosenim-init: ChooseNim installed in /Users/jeremy/.nimble/bin
choosenim-init: You must now ensure that the Nimble bin dir is in your PATH.
choosenim-init: Place the following line in the ~/.profile or ~/.bashrc file.
choosenim-init:     export PATH=/Users/jeremy/.nimble/bin:$PATH

Handy Tools

Use toPrettyProgram to disassemble an intcode program. You can pass it an array of ranges known to be data so it doesn't desync on opcode parsing.

Gotcha

I taught Nimble that all my day*.nim files are day* binaries, but it caches the targets, so you have to touch the file after adding a new one to get it to "see" the new binary target.

jeremy-w/adventofcode_2019

Advent of Code 2019

Getting Started

Handy Tools

Gotcha