Solving Advent of Code 2019-06 with R (and no JavaScript this time).
[Disclaimer] Obviously, this post contains a big spoiler about Advent of Code, as it gives solutions for solving day 6.
Instructions
Find the instructions at: https://adventofcode.com/2019/day/6
R solution
Part one
library(magrittr) library(igraph) ## ## Attaching package: 'igraph' ## The following objects are masked from 'package:stats': ## ## decompose, spectrum ## The following object is masked from 'package:base': ## ## union ipt <- read.delim("input6.txt", header = FALSE, sep = ")", stringsAsFactor = FALSE) grph <- ipt %>% graph_from_data_frame() grph %>% distance_table() %>% extract2("res") %>% sum() ## [1] 147807 Part two
distances( grph, v = V(grph)[["YOU"]], to = V(grph)[["SAN"]] ) - 2 ## SAN ## YOU 229 JS solution
Nop, no JS solution today… I didn’t feel like reimplementing igraph in JavaScript, neither digging into the graph modules today ;)
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