Day 6 part 1

day-6/main.js

@@ -0,0 +1,92 @@
+import fs from "node:fs";
+
+const DIRECTIONS = {
+  UP: "up",
+  DOWN: "down",
+  LEFT: "left",
+  RIGHT: "right",
+};
+
+function rotate(currentDir) {
+  switch (currentDir) {
+    case DIRECTIONS.UP:
+      return DIRECTIONS.RIGHT;
+    case DIRECTIONS.RIGHT:
+      return DIRECTIONS.DOWN;
+    case DIRECTIONS.DOWN:
+      return DIRECTIONS.LEFT;
+    case DIRECTIONS.LEFT:
+      return DIRECTIONS.UP;
+  }
+}
+
+function getInput() {
+  const data = fs
+    .readFileSync("input2.txt", "utf8")
+    .split("\n")
+    .map((line) => line.split(""));
+  return data;
+}
+
+function part1() {
+  let data = getInput();
+  const HEIGHT = data.length;
+  const WIDTH = data[0].length;
+  let currentDir = DIRECTIONS.UP;
+
+  let actualPos = { x: 0, y: 0 };
+
+  // Search initial pos
+  for (let y = 0; y < HEIGHT; y++) {
+    const x = data[y].indexOf("^");
+    if (x == -1) continue;
+    data[y][x] = "X";
+    actualPos.y = y;
+    actualPos.x = x;
+  }
+  // console.log(actualPos);
+
+  // Start algorithm
+  let counter = 1;
+  let nextStep = null;
+  let newX = null;
+  let newY = null;
+  while (true) {
+    switch (currentDir) {
+      case DIRECTIONS.UP:
+        newY = actualPos.y - 1;
+        newX = actualPos.x;
+        break;
+      case DIRECTIONS.DOWN:
+        newY = actualPos.y + 1;
+        newX = actualPos.x;
+        break;
+      case DIRECTIONS.LEFT:
+        newY = actualPos.y;
+        newX = actualPos.x - 1;
+        break;
+      case DIRECTIONS.RIGHT:
+        newY = actualPos.y;
+        newX = actualPos.x + 1;
+        break;
+    }
+    nextStep = (data[newY] ?? [])[newX];
+    if (nextStep == undefined) break;
+    if (nextStep == ".") {
+      data[newY][newX] = "X";
+      actualPos.y = newY;
+      actualPos.x = newX;
+      counter++;
+    } else if (nextStep == "X") {
+      actualPos.y = newY;
+      actualPos.x = newX;
+    } else {
+      currentDir = rotate(currentDir);
+    }
+  }
+  console.log(counter);
+  // print board
+  // console.log(data.map((line) => line.join("")).join("\n"));
+}
+
+part1();

readme.md

@@ -7,7 +7,8 @@ Día 1: Python
 Día 2: Zig  
 Día 3: Bash  
 Día 4: LibreOffice Calc  
-Día 5: Julia
+Día 5: Julia  
+Día 6: Javascript
 
 
 Lenguajes por usar:
@@ -19,12 +20,11 @@ Lenguajes por usar:
 1. PHP
 1. Java
 1. Ruby
-1. Javascript
+1. ~~Javascript~~
 1. ~~LibreOffice Calc~~
 1. Rust
 1. Nim
 1. C#
-1. Latino
 1. D
 1. ~~Bash~~
 1. Crystal