From 2dd81df72595d049ec1d67da609123466a60713e Mon Sep 17 00:00:00 2001
From: Seth <sethsml@hotmail.com>
Date: Mon, 28 Apr 2025 23:19:46 +0000
Subject: [PATCH] part 4 complete

---
 4/index.js  | 56 ++++++++++++++++++++++++++++++-----------------------
 4/input.txt |  2 +-
 2 files changed, 33 insertions(+), 25 deletions(-)

diff --git a/4/index.js b/4/index.js
index be7b968..01e06e4 100644
--- a/4/index.js
+++ b/4/index.js
@@ -1,6 +1,6 @@
 const fs = require("fs");
-const forwardRegex = /XMAS/g;
-const backwardRegex = /SAMX/g;
+const forwardRegex = /XMAS/;
+const backwardRegex = /SAMX/;
 const input = fs.readFileSync("input.txt", "utf-8");
 const inputArr = input.split("\n");
 let totalMatches = 0;
@@ -10,18 +10,21 @@ let totalMatches = 0;
 // console.log(forwardMatchs.length)
 //create a sliding window to match the words
 
-// for (row of inputArr) {
-//   // console.log(row)
-//   const forwardMatches = row.match(forwardRegex);
-//   const backwordsMatches = row.match(backwardRegex);
+let lineRegex = 0;
+for (row of inputArr) {
+  // console.log(row)
+  const forwardMatches = row.match(forwardRegex);
+  const backwordsMatches = row.match(backwardRegex);
 
-//   if (forwardMatches) {
-//     totalMatches += forwardMatches.length;
-//   }
-//   if (backwordsMatches) {
-//     totalMatches += backwordsMatches.length;
-//   }
-// }
+  if (forwardMatches) {
+    lineRegex += forwardMatches.length;
+  }
+  if (backwordsMatches) {
+    lineRegex += backwordsMatches.length;
+  }
+}
+
+console.log("lineRegex: ",lineRegex)
 
 // console.log(inputArr)
 const maxRows = inputArr.length;
@@ -29,41 +32,46 @@ const maxLetters = inputArr[0].length;
 
 //horizontal words
 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];
-    if (forwardRegex.test(word) || backwardRegex.test(word)) {
+    // console.log(word)
+    if (word.match(forwardRegex)|| word.match(backwardRegex)) {
       totalMatches++;
     }
   }
 }
+console.log("after horizontal: ",totalMatches)
 
 //vertical words
 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];
-    if (forwardRegex.test(word) || backwardRegex.test(word)) {
+    if (word.match(forwardRegex)|| word.match(backwardRegex)) {
       totalMatches++;
     }
   }
 }
-//angled words 1
-for (let x = 0; x + 4 < maxRows; x++) {
+console.log("after vertical: ",totalMatches)
+//angled words nw-se
+for (let x = 0; x + 3 < maxRows; x++) {
   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];
-    if (forwardRegex.test(word) || backwardRegex.test(word)) {
+    if (word.match(forwardRegex)|| word.match(backwardRegex)) {
       totalMatches++;
     }
   }
 }
-//angled words 2
-for (let x = 0; x + 4 < maxRows; x++) {
+console.log("after nw-se: ",totalMatches)
+//angled words ne-sw
+for (let x = 0; x + 3 < maxRows; x++) {
   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];
-    if (forwardRegex.test(word) || backwardRegex.test(word)) {
+    if (word.match(forwardRegex)|| word.match(backwardRegex)) {
       totalMatches++;
     }
-    console.log(word);
+    // console.log(word);
   }
 }
+console.log("after ne-sw: ",totalMatches)
 
 console.log("totalMatches: ", totalMatches);
diff --git a/4/input.txt b/4/input.txt
index 45af8b4..d8ec064 100644
--- a/4/input.txt
+++ b/4/input.txt
@@ -137,4 +137,4 @@ MAAMMXSAMSSXSASXSXSSXAMASXMSMSSSMASAXXSMAMSMMMSAAXAASMSSMMSXMASAMAMAMAXAAAAMMMSM
 MMXMXSSXMAMXMASMSAAXXMMASXMAAMAAMMMMMAXMSXMASAMXSMMSSXAXSXAXMXMAMXXXSSMSMSMSAMXMSXMMSMMXSAMMSSXMSMSSMSMXXAAASMMXMXAXXXXXMXXMASMMSAAAAXSXSSSM
 MSASXAMXMASXSXSAMMMMSXMASASMSMSMMSAMMSMAMMMAMASMXMMMMMMMMMMMMSSXMMMXMAMXMAXMASMAXXASAMAMMMMMAMXAAAAMAMXSMSSMMXXAXMMSMXMMSAXSAMAMMMMMSMMAAAXX
 ASASMXMASMMASAMAMXXASAMASMMAAAAAMMAMAAMXMAMXSAMAAXMAAAAAAAXAAASAAAXASAMAMAXXAAMAMSSXMAXSAAMMASMSMMMMXMAXMXAAXSSMSAASMSXAAAXMASMMAAAAAAMSMMMA
-XMXMASMXSXMSMXSSMAMXSXMXSXMSMSMSXSSMSXSASXSAMXXSASXSSSSSSSSMSSSSMMSASMSXSMXMASMAMSASXAXSMSSSSMMAXSMXSMXSMSSMMAXASMXMASMXMSMSAMMSXSMSSSMXXXSX
+XMXMASMXSXMSMXSSMAMXSXMXSXMSMSMSXSSMSXSASXSAMXXSASXSSSSSSSSMSSSSMMSASMSXSMXMASMAMSASXAXSMSSSSMMAXSMXSMXSMSSMMAXASMXMASMXMSMSAMMSXSMSSSMXXXSX
\ No newline at end of file