Wise Fool.
Visioneer.
Public
Edited
Dec 1, 2023
1 fork
1 star
scoreTable(RucksackReorganization(datasets, [reorganize(rearranger), reorganize(authenticator)]))
// takes rucksacks and rearrangers and runs each rearranger on each rucksak
// returns table containing results
RucksackReorganization = (rucksacks, rearrangers) =>
R.map(
(rearranger) => R.map(rearranger)(rucksacks)
)
(rearrangers)
// takes reorganizer function
// returns function that takes an input string (puzzle input) and returns its sum of priorities
reorganize = (reorganizer) => (input) =>
R.pipe(
// tidy
R.split("\n"), // → ["vJrwpWtwJgWrhcsFMMfFFhFp", "jqHR…" ] // see datasets[0]
R.filter(hasText), // like above, omitting blank lines
reorganizer, // → ["p"], ["L"], ["P"], ["v"], ["t"], ["s"]
// summarize
R.unnest, // → ["p", "L", "P", "v", "t", "s"]
R.map(priority), // → [16, 38, 42, 22, 20, 19]
R.sum, // → 157
)
(input)
// takes list of strings
// returns list of items that appears in both first and second half of input sting
rearranger =
R.map(
R.pipe(
halve,
intersect,
)
)
R.map(reorganize(rearranger))(datasets)
// takes list of three lists
// returns list of items that appear in all three lists: A ∩ B ∩ C
authenticator =
R.pipe(
R.splitEvery(3),
R.map(([a,b,c]) => R.intersection(a, R.intersection(b, c)))
// equivalent to: R.map(([a,b,c]) => R.pipe(R.intersection, R.intersection(c))(a, b))
)
R.map(reorganize(authenticator))(datasets)
// Splits a collection into slices or chunks of half the length.
halve = ((s) => R.splitEvery(s.length/2)(s))
halve("ABCDEF")
intersect = ([l,r]) => R.intersection(l,r)
// priority :: String → Number
// takes a string
// returns ‘priority’ of its first character: [a...z] → [1...26], [A...Z] → [27...52]
priority = (c) =>
c.toLowerCase().charCodeAt(0)
- "a".charCodeAt(0)
+ [1,27][+isUpperCase(c)]
// takes a String
// returns true if first charactor of String is upper case character, false otherwise, even for non alphas
isUpperCase = (c) => c.toUpperCase() === c
// takes a String
// returns true is String contains text (that is, length > 0, non-epmpty string)
hasText = x => x !== ""
scoreTable = (data) =>
Inputs.table(
data.map(([test, real], part) => ({part: part + 1, test, real})),
{width: 36*8}
)
Type JavaScript, then Shift-Enter. Ctrl-space for more options. Arrow ↑/↓ to switch modes.
R = require("ramda")
import {AoCBanner, AoCStyle} from "@martien/advent-of-code-banner"
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
