Create 2069-walking-robot-simulation-ii.js

Author: everthis

2069-walking-robot-simulation-ii.js

@@ -0,0 +1,49 @@
+/**
+ * @param {number} width
+ * @param {number} height
+ */
+const Robot = function(width, height) {
+  this.i = 0
+  const pos = Array()
+  this.len = width + height - 1 + width - 1 + height - 2
+  pos.push( [0,0,3] )
+  for(let i = 1; i < width; i++) {
+    pos.push([i, 0, 0])
+  }
+  for(let i = 1; i < height; i++) {
+    pos.push([width - 1, i, 1])
+  }
+  for(let i = 1; i < width; i++) {
+    pos.push([width - 1 - i, height - 1, 2])
+  }
+  for(let i = 1; i < height - 1; i++) {
+    pos.push([0, height - 1 - i, 3])
+  }
+  this.pos = pos
+};
+
+/** 
+ * @param {number} num
+ * @return {void}
+ */
+Robot.prototype.step = function(num) {
+  this.i += num
+};
+
+/**
+ * @return {number[]}
+ */
+Robot.prototype.getPos = function() {
+  return this.pos[this.i % this.len].slice(0, 2)
+};
+
+/**
+ * @return {string}
+ */
+Robot.prototype.getDir = function() {
+  const hash = ['East', 'North', 'West', 'South']
+  if(this.i === 0) return hash[0]
+  else {
+    return hash[this.pos[this.i % this.len][2]]
+  }
+};