2020 day 3 - feels good to be back

2020/03/part2.js

@@ -0,0 +1,23 @@
+const fs = require('fs');
+
+const data = fs.readFileSync('input.txt', 'utf-8');
+const lines = data.split('\n');
+
+console.log()
+const width = lines[0].length
+// lets do it recursively why not
+function trees(x, y, slopex, slopey) {
+  // escape case : bottom row
+  if (y >= lines.length - 1) { 
+    return lines[y][x % width]=="#"
+  }
+  // haha javascript bool to int type casting go brrr
+  return (lines[y][x % width]=="#") + trees(x+slopex, y+slopey, slopex, slopey)
+}
+
+// got lucky with this star lol
+console.log(trees(0,0,1,1)
+*trees(0,0,3,1)
+*trees(0,0,5,1)
+*trees(0,0,7,1)
+*trees(0,0,1,2))