commit lukes answer

.vscode/launch.json

@@ -48,6 +48,15 @@
                 "<node_internals>/**"
             ],
             "program": "${workspaceFolder}\\Day 3\\part1.js"
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Day3-Part1-luke",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}\\Day 3\\luke.js"
         }
     ]
 }

Day 3/luke.js

@@ -0,0 +1,357 @@
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+..#.......#.......##..#.##.....
+.#...#...#.#.............##....
+......#.#.#.........##...#..#.#
+.....#..####....#.##..........#
+...#...#.#....#.....#..#.....##
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+........##..##..#.#.#...###...#
+.#..##.#....#...##.....#.#.#...
+........##...#...##..#.........
+.........#.......#.##..#...####
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+##..##.#.##.....##...........#.
+#.............#.........#......
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+......###...#..#....#..#.###...
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+...........#...........#...#..#
+..#....#.##.#..#..#...........#
+..#.....##...#......#...#......
+...###.###.....##..........#..#`
+
+const dataLines = input.split("\n");
+
+function formatDataLine(dataLine) {
+    return dataLine.split("");
+};
+
+const map = dataLines.map(formatDataLine);
+
+const mapHeight = map.length;
+const mapWidth = map[0].length;
+const pointer = [0,0];
+
+function step(pointer, map, goRight, goDown) {
+    const x = pointer[0];
+    const y = pointer[1];
+    let newX = x + goRight;
+    let newY = y + goDown;
+    if (newX > (mapWidth - 1)) {
+        newX = newX - mapWidth;
+    }
+    pointer[0] = newX;
+    pointer[1] = newY;
+    // has to do y then x. [ row[col, col], ... ]
+    return map[pointer[1]][pointer[0]];
+}
+
+let treeCount = 0;
+while(pointer[1] < (mapHeight - 1)) {
+    const land = step(pointer, map, 3, 1);
+    if (land === "#") treeCount++;
+}
+
+console.log(treeCount);

Day 3/part1.js

@@ -16,8 +16,6 @@ let totalLines = lines.length
 let dataArray = data.match(/.{1,31}/g)
 let stringSplit = data.split('')
 
-dataArray.forEach(element => {
-    console.log(stringSplit)
-    let t = element.charAt(right)
-    console.log(t)
-})
+let map = lines.map(stringSplit)
+
+console.log(map)