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part 4 complete

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This commit is contained in:
Seth Samuel 2025-04-28 23:19:46 +00:00
parent f902e5f6b3
commit 2dd81df725
2 changed files with 33 additions and 25 deletions
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56
4/index.js
View file

@ -1,6 +1,6 @@
const fs = require("fs"); const fs = require("fs");
const forwardRegex = /XMAS/g; const forwardRegex = /XMAS/;
const backwardRegex = /SAMX/g; const backwardRegex = /SAMX/;
const input = fs.readFileSync("input.txt", "utf-8"); const input = fs.readFileSync("input.txt", "utf-8");
const inputArr = input.split("\n"); const inputArr = input.split("\n");
let totalMatches = 0; let totalMatches = 0;
@ -10,18 +10,21 @@ let totalMatches = 0;
// console.log(forwardMatchs.length) // console.log(forwardMatchs.length)
//create a sliding window to match the words //create a sliding window to match the words
// for (row of inputArr) { let lineRegex = 0;
// // console.log(row) for (row of inputArr) {
// const forwardMatches = row.match(forwardRegex); // console.log(row)
// const backwordsMatches = row.match(backwardRegex); const forwardMatches = row.match(forwardRegex);
const backwordsMatches = row.match(backwardRegex);
// if (forwardMatches) { if (forwardMatches) {
// totalMatches += forwardMatches.length; lineRegex += forwardMatches.length;
// } }
// if (backwordsMatches) { if (backwordsMatches) {
// totalMatches += backwordsMatches.length; lineRegex += backwordsMatches.length;
// } }
// } }
console.log("lineRegex: ",lineRegex)
// console.log(inputArr) // console.log(inputArr)
const maxRows = inputArr.length; const maxRows = inputArr.length;
@ -29,41 +32,46 @@ const maxLetters = inputArr[0].length;
//horizontal words //horizontal words
for (let x = 0; x < maxRows; x++) { for (let x = 0; x < maxRows; x++) {
for (let y = 0; y + 3 <= maxLetters; y++) { for (let y = 0; y + 3 < maxLetters; y++) {
const word = inputArr[x][y] + inputArr[x][y + 1] + inputArr[x][y + 2] + inputArr[x][y + 3]; const word = inputArr[x][y] + inputArr[x][y + 1] + inputArr[x][y + 2] + inputArr[x][y + 3];
if (forwardRegex.test(word) || backwardRegex.test(word)) { // console.log(word)
if (word.match(forwardRegex)|| word.match(backwardRegex)) {
totalMatches++; totalMatches++;
} }
} }
} }
console.log("after horizontal: ",totalMatches)
//vertical words //vertical words
for (let x = 0; x + 3 < maxRows; x++) { for (let x = 0; x + 3 < maxRows; x++) {
for (let y = 0; y <= maxLetters; y++) { for (let y = 0; y < maxLetters; y++) {
const word = inputArr[x][y] + inputArr[x + 1][y] + inputArr[x + 2][y] + inputArr[x + 3][y]; const word = inputArr[x][y] + inputArr[x + 1][y] + inputArr[x + 2][y] + inputArr[x + 3][y];
if (forwardRegex.test(word) || backwardRegex.test(word)) { if (word.match(forwardRegex)|| word.match(backwardRegex)) {
totalMatches++; totalMatches++;
} }
} }
} }
//angled words 1 console.log("after vertical: ",totalMatches)
for (let x = 0; x + 4 < maxRows; x++) { //angled words nw-se
for (let x = 0; x + 3 < maxRows; x++) {
for (let y = 0; y +3< maxLetters; y++) { for (let y = 0; y +3< maxLetters; y++) {
const word = inputArr[x][y] + inputArr[x + 1][y + 1] + inputArr[x + 2][y + 2] + inputArr[x + 3][y + 3]; const word = inputArr[x][y] + inputArr[x + 1][y + 1] + inputArr[x + 2][y + 2] + inputArr[x + 3][y + 3];
if (forwardRegex.test(word) || backwardRegex.test(word)) { if (word.match(forwardRegex)|| word.match(backwardRegex)) {
totalMatches++; totalMatches++;
} }
} }
} }
//angled words 2 console.log("after nw-se: ",totalMatches)
for (let x = 0; x + 4 < maxRows; x++) { //angled words ne-sw
for (let x = 0; x + 3 < maxRows; x++) {
for (let y = 0; y +3< maxLetters; y++) { for (let y = 0; y +3< maxLetters; y++) {
const word = inputArr[x][y+3] + inputArr[x+1][y + 2] + inputArr[x + 2][y + 1] + inputArr[x+3][y]; const word = inputArr[x][y+3] + inputArr[x+1][y + 2] + inputArr[x + 2][y + 1] + inputArr[x+3][y];
if (forwardRegex.test(word) || backwardRegex.test(word)) { if (word.match(forwardRegex)|| word.match(backwardRegex)) {
totalMatches++; totalMatches++;
} }
console.log(word); // console.log(word);
} }
} }
console.log("after ne-sw: ",totalMatches)
console.log("totalMatches: ", totalMatches); console.log("totalMatches: ", totalMatches);

2
4/input.txt
View file

@ -137,4 +137,4 @@ MAAMMXSAMSSXSASXSXSSXAMASXMSMSSSMASAXXSMAMSMMMSAAXAASMSSMMSXMASAMAMAMAXAAAAMMMSM
MMXMXSSXMAMXMASMSAAXXMMASXMAAMAAMMMMMAXMSXMASAMXSMMSSXAXSXAXMXMAMXXXSSMSMSMSAMXMSXMMSMMXSAMMSSXMSMSSMSMXXAAASMMXMXAXXXXXMXXMASMMSAAAAXSXSSSM MMXMXSSXMAMXMASMSAAXXMMASXMAAMAAMMMMMAXMSXMASAMXSMMSSXAXSXAXMXMAMXXXSSMSMSMSAMXMSXMMSMMXSAMMSSXMSMSSMSMXXAAASMMXMXAXXXXXMXXMASMMSAAAAXSXSSSM
MSASXAMXMASXSXSAMMMMSXMASASMSMSMMSAMMSMAMMMAMASMXMMMMMMMMMMMMSSXMMMXMAMXMAXMASMAXXASAMAMMMMMAMXAAAAMAMXSMSSMMXXAXMMSMXMMSAXSAMAMMMMMSMMAAAXX MSASXAMXMASXSXSAMMMMSXMASASMSMSMMSAMMSMAMMMAMASMXMMMMMMMMMMMMSSXMMMXMAMXMAXMASMAXXASAMAMMMMMAMXAAAAMAMXSMSSMMXXAXMMSMXMMSAXSAMAMMMMMSMMAAAXX
ASASMXMASMMASAMAMXXASAMASMMAAAAAMMAMAAMXMAMXSAMAAXMAAAAAAAXAAASAAAXASAMAMAXXAAMAMSSXMAXSAAMMASMSMMMMXMAXMXAAXSSMSAASMSXAAAXMASMMAAAAAAMSMMMA ASASMXMASMMASAMAMXXASAMASMMAAAAAMMAMAAMXMAMXSAMAAXMAAAAAAAXAAASAAAXASAMAMAXXAAMAMSSXMAXSAAMMASMSMMMMXMAXMXAAXSSMSAASMSXAAAXMASMMAAAAAAMSMMMA
XMXMASMXSXMSMXSSMAMXSXMXSXMSMSMSXSSMSXSASXSAMXXSASXSSSSSSSSMSSSSMMSASMSXSMXMASMAMSASXAXSMSSSSMMAXSMXSMXSMSSMMAXASMXMASMXMSMSAMMSXSMSSSMXXXSX XMXMASMXSXMSMXSSMAMXSXMXSXMSMSMSXSSMSXSASXSAMXXSASXSSSSSSSSMSSSSMMSASMSXSMXMASMAMSASXAXSMSSSSMMAXSMXSMXSMSSMMAXASMXMASMXMSMSAMMSXSMSSSMXXXSX