From e2cfb6254d478ab3ab7635a5b393ca6a7b07b838 Mon Sep 17 00:00:00 2001
From: Patrick Michl <patrick.michl@hetzner.com>
Date: Thu, 1 Dec 2022 19:11:19 +0100
Subject: [PATCH] factor out sum function

---
 src/day_1.sh | 4 +---
 utils.sh     | 9 +++++++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/day_1.sh b/src/day_1.sh
index acd61f4..b4933f4 100644
--- a/src/day_1.sh
+++ b/src/day_1.sh
@@ -23,9 +23,7 @@ p1() {
 
 p2() {
    read -ra cals <<< "$(cals_per_elf "$1")"
-   local result=0
-   for i in "${cals[@]: -3}"; do ((result+=i)); done
-   echo "$result"
+   utils.sum "${cals[@]: -3}"
 }
 
 p1 "$INPUT"
diff --git a/utils.sh b/utils.sh
index 20d3505..2bc9c6e 100644
--- a/utils.sh
+++ b/utils.sh
@@ -15,6 +15,15 @@ utils.qsort() {
 
   read -ra smaller_sorted <<< "$(utils.qsort "${smaller[@]}")"
   read -ra bigger_sorted <<< "$(utils.qsort "${bigger[@]}")"
+
   res=("${smaller_sorted[@]}" "$pivot" "${bigger_sorted[@]}")
+
   echo "${res[@]}"
 }
+
+utils.sum() {
+  read -ra input <<< "$@"
+  local result=0
+  for i in "${input[@]}"; do ((result+=i)); done
+  echo "$result"
+}