In soniamitchell/adventofcode: My Advent of Code solutions

knitr::opts_chunk$set(echo = TRUE)

# Benchmark code chunks
knitr::knit_hooks$set(
  time = function(before, envir) {
    t <- proc.time()['elapsed']
    if(before) {
      envir$.elapsed <- t
    } else {
      paste(signif(t - envir$.elapsed), 'sec.')
    }
  }
)

library(JuliaCall)

```{julia setup, include=FALSE} using Pkg Pkg.activate("2020/julia") Pkg.instantiate()

```{julia libraries, message=FALSE}
using DelimitedFiles
using Combinatorics
using Formatting

Day 1: Report Repair

Part 1

```{julia day1-1, code=readLines("2020/julia/src/1-1.jl"), time = TRUE}

#### Notes

* **Array comprehension** has the following syntax:

```{julia}
[x^2 for x = 1:3]

Part 2

```{julia day1-2, code=readLines("2020/julia/src/1-2.jl"), time = TRUE}

#### Notes

* **Conditional comprehension** has the following syntax:

```{julia}
[x^2 for x = 1:3 if x > 1]

Day 2: Password Philosophy

Part 1

```{julia day2-1, code=readLines("2020/julia/src/2-1.jl"), time = TRUE}

#### Notes

* The **ternary operator**, `?:` is related to `if-elseif-else` syntax and is 
written as `condition ? value_if_true : value_if_false`.

* Julia complains of scoping issues when calling `results` += 1` inside a `for` 
loop (if `results` was defined outside of it). Rather than using 
`global results += 1`, putting everything into a function will achieve the
expected behaviour.

### Part 2

```{julia day2-2, code=readLines("2020/julia/src/2-2.jl"), time = TRUE}

Day 3: Toboggan Trajectory

Part 1

```{julia day3-1, code=readLines("2020/julia/src/3-1.jl"), time = TRUE}

### Part 2

```{julia day3-2, code=readLines("2020/julia/src/3-2.jl"), time = TRUE}

Day 4: Passport Processing

Part 1

```{julia day4-1, code=readLines("2020/julia/src/4-1.jl"), time = TRUE}

### Part 2

```{julia day4-2, code=readLines("2020/julia/src/4-2.jl"), time = TRUE}

Day 5: Binary Boarding

Part 1

```{julia day5-1, code=readLines("2020/julia/src/5-1.jl"), time = TRUE}

### Part 2

`\in` and `\notin`, then TAB:

```{julia day5-2, code=readLines("2020/julia/src/5-2.jl"), time = TRUE}

Day 6: Custom Customs

Part 1

```{julia day6-1, code=readLines("2020/julia/src/6-1.jl"), time = TRUE}

## Day 7: [Handy Haversacks](https://adventofcode.com/2020/day/7)

### Part 1

```{julia day7-1}

Day 8: Handheld Halting

Part 1

```{julia day8-1, code=readLines("2020/julia/src/8-1.jl"), time = TRUE}

### Part 2

```{julia day8-2, code=readLines("2020/julia/src/8-2.jl"), time = TRUE}

Day 9: Encoding Error

Part 1

```{julia day9-1, code=readLines("2020/julia/src/9-1.jl"), time = TRUE}

### Part 2

```{julia day9-2, code=readLines("2020/julia/src/9-2.jl"), time = TRUE}

Day 10: Adapter Array

Part 1

{julia day10-1, code=readLines("2020/julia/src/10-1.jl"), time = TRUE}

soniamitchell/adventofcode documentation built on Jan. 8, 2022, 9:33 a.m.