From 7ca4504295bb19cfe1022dae19a66ff64fa72e32 Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine97.martin@gmail.com>
Date: Fri, 22 Nov 2019 17:26:02 +0100
Subject: [PATCH] 2018: day05: move logic to collapse fn

---
 aoc2018/src/day05.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/aoc2018/src/day05.rs b/aoc2018/src/day05.rs
index 706985b..96a72c8 100644
--- a/aoc2018/src/day05.rs
+++ b/aoc2018/src/day05.rs
@@ -12,7 +12,7 @@ fn same_type(a: char, b: char) -> bool {
     a.to_ascii_lowercase() == b.to_ascii_lowercase()
 }
 
-fn part1(input: &str) -> Result<usize> {
+fn collapse(input: &str) -> String {
     let mut res = String::with_capacity(input.len());
 
     // tracks last character of string
@@ -42,6 +42,11 @@ fn part1(input: &str) -> Result<usize> {
         res.push(c);
     }
 
+    res
+}
+
+fn part1(input: &str) -> Result<usize> {
+    let res = collapse(input);
     Ok(res.len())
 }