From: Greg Burri <greg.burri@gmail.com>
Date: Thu, 1 Dec 2022 23:31:53 +0000 (+0100)
Subject: Use Reverse + k_smallest (code simplification)
X-Git-Url: http://git.euphorik.ch/index.cgi?a=commitdiff_plain;h=4efcec7be9d74d792f70cfba682bac8290f00832;p=advent_of_code_2022.git

Use Reverse + k_smallest (code simplification)
---

diff --git a/src/day01.rs b/src/day01.rs
index c1875bb..d88d000 100644
--- a/src/day01.rs
+++ b/src/day01.rs
@@ -1,4 +1,6 @@
-use std::{iter::Iterator, io::BufRead, ops::AddAssign};
+use std::{iter::Iterator, io::BufRead, ops::AddAssign, cmp::Reverse};
+
+use itertools::*;
 
 pub fn read_calories<R>(reader: R) -> Vec<i64>
 where
@@ -22,9 +24,7 @@ pub fn get_most_calories(calories: &[i64]) -> i64 {
 }
 
 pub fn get_sum_most_three_calories(calories: &[i64]) -> i64 {
-    let mut calories = Vec::from(calories);
-    calories.sort_by(|a, b| b.cmp(a));
-    calories.iter().take(3).sum()
+    calories.iter().map(Reverse).k_smallest(3).map(|n| n.0).sum()
 }