From bf04058082a980f1ac7907ad3006bd45212f624c Mon Sep 17 00:00:00 2001
From: Jack Bond-Preston <jb17662@my.bristol.ac.uk>
Date: Wed, 5 Dec 2018 20:32:56 +0000
Subject: [PATCH] Remove gross for loop

---
 aoc-5/main.js | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/aoc-5/main.js b/aoc-5/main.js
index 2835171..451a7bb 100644
--- a/aoc-5/main.js
+++ b/aoc-5/main.js
@@ -7,13 +7,14 @@ function swapCase(c) {
 }
 
 function collapsePolymer(polymer) {
-    for (let i = 0; i < polymer.length; i++) {
-        let c = polymer[i];
-    
-        if (i !== polymer.length - 1 && c === swapCase(polymer[i + 1])) {
+    let i = 0;
+    while(i < polymer.length - 1) {
+        if (polymer[i] === swapCase(polymer[i + 1])) {
             polymer.splice(i, 2);
             i = Math.max(-1, i - 2);
         }
+
+        i++;
     }
 
     return polymer.length;