cleanup unused

src/bin/day4.rs

@@ -1,20 +1,15 @@
 use aoc23::prelude::*;
 use itertools::Itertools;
 use std::{
-    collections::{
-        HashMap,
-        VecDeque,
-    },
+    collections::{HashMap, VecDeque},
     str::FromStr,
 };
 
 #[derive(Debug)]
 struct Card {
     id: usize,
-    winning_numbers: Vec<usize>,
-    numbers: Vec<usize>,
-    matches: usize,
-    score: usize,
+    part_2_matches: usize,
+    part_1_score: usize,
 }
 
 impl FromStr for Card {
@@ -23,61 +18,66 @@ impl FromStr for Card {
     fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
         let mut id: Option<usize> = None;
         let mut winning_numbers: Vec<usize> = vec![];
-        let mut numbers: Vec<usize> = vec![];
         let mut score = 0;
         let mut matches = 0;
         for part in s.split(':') {
             if id.is_some() {
                 for (num_mode, wins_or_nums) in part.split('|').enumerate() {
-                    wins_or_nums.trim().split_whitespace().into_iter().map(|num| {
-                        num.parse::<usize>().expect(&format!("could not parse number: {}", num))
-                    }).for_each(|num| {
+                    wins_or_nums
+                        .trim()
+                        .split_whitespace()
+                        .into_iter()
+                        .map(|num| {
+                            num.parse::<usize>()
+                                .expect(&format!("could not parse number: {}", num))
+                        })
+                        .for_each(|num| {
                             if num_mode == 0 {
                                 winning_numbers.push(num);
                             } else {
-                            numbers.push(num);
                                 if winning_numbers.iter().any(|winner| winner == &num) {
                                     matches += 1;
-                                score = if score == 0 {
-                                    1
-                                } else {
-                                    score * 2
-                                };
+                                    score = if score == 0 { 1 } else { score * 2 };
                                 }
                             }
                         });
                 }
             } else {
-                id = Some(part.split_whitespace().last().ok_or("Failed to get last item")?.parse()?)
+                id = Some(
+                    part.split_whitespace()
+                        .last()
+                        .ok_or("Failed to get last item")?
+                        .parse()?,
+                )
             }
         }
         Ok(Card {
             id: id.ok_or("no id found")?,
-            winning_numbers,
-            numbers,
-            score,
-            matches,
+            part_1_score: score,
+            part_2_matches: matches,
         })
     }
 }
 
 fn part1(input: String) -> Result<usize> {
-    Ok(
-        input
+    Ok(input
         .lines()
         .map(|line| line.parse::<Card>())
         .filter_map(|card| card.ok())
-            .fold(0, |sum, card| sum + card.score),
-    )
+        .fold(0, |sum, card| sum + card.part_1_score))
 }
 
 fn part2(input: String) -> Result<usize> {
     let mut sum = 0;
-    let cards = input.lines().map(|line| line.parse::<Card>()).filter_map(|card| card.ok()).collect_vec();
+    let cards = input
+        .lines()
+        .map(|line| line.parse::<Card>())
+        .filter_map(|card| card.ok())
+        .collect_vec();
     let mut queue: VecDeque<&Card> = cards.iter().collect();
     while let Some(card) = queue.pop_front() {
         sum += 1;
-        for card_index in card.id .. card.id + card.matches {
+        for card_index in card.id..card.id + card.part_2_matches {
             cards.get(card_index).map(|c| queue.push_back(&c));
         }
     }