From 6a396b84b0d665607df98452a6d694835d87b5c6 Mon Sep 17 00:00:00 2001
From: cos <cos>
Date: Sun, 1 Dec 2019 17:08:45 +0100
Subject: Compactify/clean-up code

---
 2019/rust/day01/src/main.rs | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/2019/rust/day01/src/main.rs b/2019/rust/day01/src/main.rs
index c984e80..3eb12f7 100644
--- a/2019/rust/day01/src/main.rs
+++ b/2019/rust/day01/src/main.rs
@@ -2,29 +2,21 @@ use std::io::{self, BufRead};
 
 fn read_input() -> Vec<i32> {
     let stdin = io::stdin();
-    let nums: Vec<i32> = stdin.lock().lines().map(|x| x.unwrap().parse().unwrap()).collect();
-    nums
+    stdin.lock().lines().map(|line| line.unwrap().parse().unwrap()).collect()
 }
 
 fn first_puzzle(payloads:&Vec<i32>) -> i32 {
-    let fuel = payloads.iter().fold(0, |fuel, mass| fuel + mass/3-2);
-
-    fuel
+    payloads.iter().map(|mass| mass/3-2).sum()
 }
 
 fn second_puzzle(payloads:&Vec<i32>) -> i32 {
     fn fuel_required(mass:&i32) -> i32 {
         let fuel = mass/3-2;
 
-        if fuel > 0 {
-            fuel + fuel_required(&fuel)
-        } else {
-            0
-        }
+        if fuel > 0 { fuel + fuel_required(&fuel) } else { 0 }
     }
 
-    let fuel = payloads.iter().fold(0, |fuel, mass| fuel + fuel_required(mass));
-    fuel
+    payloads.iter().map(|mass| fuel_required(mass)).sum()
 }
 
 fn main() {
-- 
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