This commit is contained in:
Yanick Champoux 2022-12-13 12:58:27 -05:00
parent f4553810c1
commit f80142b6a7
3 changed files with 38 additions and 42 deletions

View File

@ -7,40 +7,36 @@ const readInput = (...args) =>
readFile(...args),
(lines) => lines.split("\n\n"),
R.compact, // remove last line
R.map(
block => block.split("\n").map( line => eval(line) )
)
R.map((block) => block.split("\n").map((line) => eval(line)))
);
export const puzzleInput = readInput(import.meta.url, "input");
export const sample = readInput(import.meta.url, "sample");
export function isLessThan(x,y) {
if( [x,y].every(R.isNumber) ) return x < y ? -1 : x == y ? 0 : 1;
export function isLessThan(x, y) {
if ([x, y].every(R.isNumber)) return x < y ? -1 : x == y ? 0 : 1;
if( [x,y].every(R.isArray) ) {
for ( const [a,b] of R.zip(x,y)) {
const res = isLessThan(a,b);
if(res !== 0) return res;
}
if( x.length === y.length ) return 0
return x.length < y.length ? -1 : 1;
if ([x, y].every(R.isArray)) {
for (const [a, b] of R.zip(x, y)) {
const res = isLessThan(a, b);
if (res !== 0) return res;
}
if (x.length === y.length) return 0;
return x.length < y.length ? -1 : 1;
}
return isLessThan(...[x,y].map( z => R.isNumber(z)? [z] : z ));
return isLessThan(...[x, y].map((z) => (R.isNumber(z) ? [z] : z)));
}
const passthru = (x) => (arg) => {
x(arg);
return arg;
}
x(arg);
return arg;
};
export default R.createPipe(
R.map( ([x,y]) => isLessThan(x,y) ),
(results) => results.map(
(value,index) => ({ value, index: index+1 })
),
R.filter( ({ value }) => value !== 1 ),
R.map( R.prop('index') ),
(results) => results.reduce((a,b) => a+b)
R.map(([x, y]) => isLessThan(x, y)),
(results) => results.map((value, index) => ({ value, index: index + 1 })),
R.filter(({ value }) => value !== 1),
R.map(R.prop("index")),
(results) => results.reduce((a, b) => a + b)
);

View File

@ -1,13 +1,14 @@
import * as R from "remeda";
import { isLessThan } from "./part1";
const dividers = [[[2]],[[6]]];
const dividers = [[[2]], [[6]]];
export default R.createPipe(
R.flatten,
R.concat(dividers),
(packets) => packets.sort(isLessThan),
packets => packets.map( (p,i) => ({ i: i+1, divider: dividers.includes(p) }) ),
R.filter( ({divider}) => divider ),
R.map(R.prop('i')),
(v) => v.reduce((a,b)=>a*b),
R.flatten,
R.concat(dividers),
(packets) => packets.sort(isLessThan),
(packets) =>
packets.map((p, i) => ({ i: i + 1, divider: dividers.includes(p) })),
R.filter(({ divider }) => divider),
R.map(R.prop("i")),
(v) => v.reduce((a, b) => a * b)
);

View File

@ -5,17 +5,16 @@ import part1, { sample, puzzleInput, isLessThan } from "./part1.js";
import part2 from "./part2.js";
describe("part 1", () => {
test( "readInput", () => {
expect(sample[0][0]).toEqual([1,1,3,1,1]);
});
test( "lessThan", () => {
expect( isLessThan(1,2) ).toBe(-1);
expect( isLessThan(2,1) ).toBe(1);
expect( isLessThan(2,2) ).toBe(0);
expect( isLessThan(2,[1]) ).toBe(1);
expect( isLessThan([1],[2]) ).toBe(-1);
});
test("readInput", () => {
expect(sample[0][0]).toEqual([1, 1, 3, 1, 1]);
});
test("lessThan", () => {
expect(isLessThan(1, 2)).toBe(-1);
expect(isLessThan(2, 1)).toBe(1);
expect(isLessThan(2, 2)).toBe(0);
expect(isLessThan(2, [1])).toBe(1);
expect(isLessThan([1], [2])).toBe(-1);
});
test("sample", () => {
expect(part1(sample)).toEqual(13);
});