From 6f45c42781905e1646ba9c9fe9483bc0a452c8b3 Mon Sep 17 00:00:00 2001
From: Tim Stallard <code@timstallard.me.uk>
Date: Mon, 19 Dec 2016 00:27:20 +0000
Subject: [PATCH] Day 18

---
 day18/part1.js | 7 +++++++
 day18/part2.js | 7 +++++++
 2 files changed, 14 insertions(+)
 create mode 100644 day18/part1.js
 create mode 100644 day18/part2.js

diff --git a/day18/part1.js b/day18/part1.js
new file mode 100644
index 0000000..0df15dc
--- /dev/null
+++ b/day18/part1.js
@@ -0,0 +1,7 @@
+nextline = (line)=>(line.split("").map((char, i, arr)=>([arr[i-1], arr[i], arr[i+1]]).map((char)=>(char ? char : ".")).join("")).map((str)=>(["^^.", ".^^", "..^", "^.."].indexOf(str) != -1)).map((trap)=>(trap ? "^" : ".")).join(""));
+
+var lines = [".^^^^^.^^^..^^^^^...^.^..^^^.^^....^.^...^^^...^^^^..^...^...^^.^.^.......^..^^...^.^.^^..^^^^^...^."];
+while(lines.length < 40){
+	lines.push(nextline(lines[lines.length - 1]));
+}
+console.log(lines.map((line)=>(line.replace(/\^/g, ""))).join("").length);
diff --git a/day18/part2.js b/day18/part2.js
new file mode 100644
index 0000000..91bd499
--- /dev/null
+++ b/day18/part2.js
@@ -0,0 +1,7 @@
+nextline = (line)=>(line.split("").map((char, i, arr)=>([arr[i-1], arr[i], arr[i+1]]).map((char)=>(char ? char : ".")).join("")).map((str)=>(["^^.", ".^^", "..^", "^.."].indexOf(str) != -1)).map((trap)=>(trap ? "^" : ".")).join(""));
+
+var lines = [".^^^^^.^^^..^^^^^...^.^..^^^.^^....^.^...^^^...^^^^..^...^...^^.^.^.......^..^^...^.^.^^..^^^^^...^."];
+while(lines.length < 400000){
+	lines.push(nextline(lines[lines.length - 1]));
+}
+console.log(lines.map((line)=>(line.replace(/\^/g, ""))).join("").length);