59 lines
1.2 KiB
JavaScript
59 lines
1.2 KiB
JavaScript
import * as R from "remeda";
|
|
import { test, expect } from "vitest";
|
|
import fs from "fs-extra";
|
|
import path from 'path';
|
|
|
|
import { spy } from '../01/main.js';
|
|
|
|
export const sampleInput = `A Y
|
|
B X
|
|
C Z`;
|
|
|
|
export const puzzleInput =
|
|
fs.readFileSync( path.join( path.dirname(import.meta.url), "input").replace('file:',''), "utf8");
|
|
|
|
const playMap = {
|
|
X: 'A', // rock
|
|
Y: 'B', // paper
|
|
Z: 'C', // scissors
|
|
}
|
|
|
|
export const parseInput = R.createPipe(
|
|
text => text.split("\n"),
|
|
R.map( entry => entry.split(' ') ),
|
|
R.map( ([a,b]) => [a,playMap[b]] ),
|
|
)
|
|
|
|
|
|
const playScore = {
|
|
A: 1,
|
|
B: 2,
|
|
C: 3,
|
|
};
|
|
|
|
const draw = 3;
|
|
const lost = 0;
|
|
const win = 6;
|
|
|
|
const outcome = ( opponent, me ) => {
|
|
if( opponent === me ) return draw;
|
|
if( opponent === 'A' ) {
|
|
return me === 'C' ? lost : win;
|
|
}
|
|
if( opponent === 'B' ) {
|
|
return me === 'A' ? lost : win;
|
|
}
|
|
return me === 'B' ? lost : win;
|
|
}
|
|
|
|
export const mapScores = ([opponent,me]) => [ outcome(opponent,me), playScore[me] ];
|
|
|
|
export const solutionPart1 = R.createPipe(
|
|
parseInput,
|
|
R.filter( ([a]) => a ), // remove last line
|
|
R.map( mapScores ),
|
|
R.map( R.sumBy(R.identity) ),
|
|
R.sumBy(R.identity)
|
|
);
|
|
|