From f072a6de0da98a3cebfbaf0192b887639f275aad Mon Sep 17 00:00:00 2001
From: Tim Stallard <code@timstallard.me.uk>
Date: Thu, 1 Dec 2016 10:46:02 +0000
Subject: [PATCH] Added day 1

---
 day01/part1.js |  7 +++++++
 day01/part2.js | 25 +++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 day01/part1.js
 create mode 100644 day01/part2.js

diff --git a/day01/part1.js b/day01/part1.js
new file mode 100644
index 0000000..b8a9cce
--- /dev/null
+++ b/day01/part1.js
@@ -0,0 +1,7 @@
+var moves = [[1, 0], [0, -1], [-1, 0], [0, 1]];
+var coords = [0, 0];
+var input = "R1, R1, R3, R1, R1, L2, R5, L2, R5, R1, R4, L2, R3, L3, R4, L5, R4, R4, R1, L5, L4, R5, R3, L1, R4, R3, L2, L1, R3, L4, R3, L2, R5, R190, R3, R5, L5, L1, R54, L3, L4, L1, R4, R1, R3, L1, L1, R2, L2, R2, R5, L3, R4, R76, L3, R4, R191, R5, R5, L5, L4, L5, L3, R1, R3, R2, L2, L2, L4, L5, L4, R5, R4, R4, R2, R3, R4, L3, L2, R5, R3, L2, L1, R2, L3, R2, L1, L1, R1, L3, R5, L5, L1, L2, R5, R3, L3, R3, R5, R2, R5, R5, L5, L5, R2, L3, L5, L2, L1, R2, R2, L2, R2, L3, L2, R3, L5, R4, L4, L5, R3, L4, R1, R3, R2, R4, L2, L3, R2, L5, R5, R4, L2, R4, L1, L3, L1, L3, R1, R2, R1, L5, R5, R3, L3, L3, L2, R4, R2, L5, L1, L1, L5, L4, L1, L1, R1";
+var steps = input.replace(/L/g, "R0, R0, R").split(", ").map((a)=>parseInt(a.substr(1)));
+var finalCoords = steps.map((a, i)=>[moves[i%4][0] * a, moves[i%4][1] * a]).reduce((a, b)=>[a[0] + b[0], a[1] + b[1]], [0, 0]);
+var distance = finalCoords.map(Math.abs).reduce((a, b)=>(a + b));
+console.log(distance);
diff --git a/day01/part2.js b/day01/part2.js
new file mode 100644
index 0000000..84f4752
--- /dev/null
+++ b/day01/part2.js
@@ -0,0 +1,25 @@
+var moves = [[1, 0], [0, -1], [-1, 0], [0, 1]];
+var coords = [0, 0];
+var input = "R1, R1, R3, R1, R1, L2, R5, L2, R5, R1, R4, L2, R3, L3, R4, L5, R4, R4, R1, L5, L4, R5, R3, L1, R4, R3, L2, L1, R3, L4, R3, L2, R5, R190, R3, R5, L5, L1, R54, L3, L4, L1, R4, R1, R3, L1, L1, R2, L2, R2, R5, L3, R4, R76, L3, R4, R191, R5, R5, L5, L4, L5, L3, R1, R3, R2, L2, L2, L4, L5, L4, R5, R4, R4, R2, R3, R4, L3, L2, R5, R3, L2, L1, R2, L3, R2, L1, L1, R1, L3, R5, L5, L1, L2, R5, R3, L3, R3, R5, R2, R5, R5, L5, L5, R2, L3, L5, L2, L1, R2, R2, L2, R2, L3, L2, R3, L5, R4, L4, L5, R3, L4, R1, R3, R2, R4, L2, L3, R2, L5, R5, R4, L2, R4, L1, L3, L1, L3, R1, R2, R1, L5, R5, R3, L3, L3, L2, R4, R2, L5, L1, L1, L5, L4, L1, L1, R1";
+var steps = input.replace(/L/g, "R0, R0, R").split(", ").map((a)=>parseInt(a.substr(1)));
+var locations = [];
+function addCoord(x, y){
+  if(!locations[x]){
+    locations[x] = [];
+  }
+  if(!locations[x][y]){
+    locations[x][y] = 0;
+  }
+  locations[x][y]++;
+}
+var coords = [0, 0]
+for(var step in steps){
+  for(var i = 0; i < steps[step]; i++){
+    coords = [coords[0] + moves[step%4][0], coords[1] + moves[step%4][1]];
+    addCoord(coords[0], coords[1]);
+    if(locations[coords[0]][coords[1]] == 2){
+      console.log(coords);
+      console.log(coords.map(Math.abs).reduce((a, b)=>(a + b)));
+    }
+  }
+}