Linter cleanup

src/bin/day10.rs

@@ -1,4 +1,3 @@
-use std::collections::HashSet;
 use std::error::Error;
 use std::fs::File;
 use std::io::{self, BufRead};

src/bin/day3.rs

@@ -3,11 +3,11 @@ use std::fs::File;
 use std::io::{self, BufRead};
 use std::vec::Vec;
 
-const word_len: usize = 12;
+const WORD_LEN: usize = 12;
 
 fn to_weights(line: String) -> Vec<i32> {
-    let mut result = zero_fill(word_len);
-    for i in 0..word_len {
+    let mut result = zero_fill(WORD_LEN);
+    for i in 0..WORD_LEN {
         result[i] = match line.chars().nth(i) {
             Some('1') => 1,
             Some('0') => -1,
@@ -32,7 +32,7 @@ fn weights_to_int(weights: &Vec<i32>) -> i32 {
     let mut res = 0;
     for i in 0..weights.len() {
         if weights[i] > 0 {
-            res |= 1 << word_len - 1 - i;
+            res |= 1 << WORD_LEN - 1 - i;
         }
     }
     res
@@ -44,16 +44,16 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     let weights: Vec<Vec<i32>> = lines.map(|l| to_weights(l)).collect();
 
-    let bits: Vec<i32> = weights.iter().fold(zero_fill(word_len), sum_weights);
+    let bits: Vec<i32> = weights.iter().fold(zero_fill(WORD_LEN), sum_weights);
 
     let mut gamma = 0;
     let mut epsilon = 0;
 
     for i in 0..bits.len() {
         if bits[i] > 0 {
-            gamma |= 1 << word_len - 1 - i;
+            gamma |= 1 << WORD_LEN - 1 - i;
         } else {
-            epsilon |= 1 << word_len - 1 - i;
+            epsilon |= 1 << WORD_LEN - 1 - i;
         }
     }
 
@@ -75,7 +75,7 @@ fn main() -> Result<(), Box<dyn Error>> {
             })
             .collect();
         selection_pos += 1;
-        oxy_bits = oxy_weights.iter().fold(zero_fill(word_len), sum_weights);
+        oxy_bits = oxy_weights.iter().fold(zero_fill(WORD_LEN), sum_weights);
     }
     println!("oxy_weights: {:?}", oxy_weights);
 
@@ -92,7 +92,7 @@ fn main() -> Result<(), Box<dyn Error>> {
             })
             .collect();
         selection_pos += 1;
-        co2_bits = co2_weights.iter().fold(zero_fill(word_len), sum_weights);
+        co2_bits = co2_weights.iter().fold(zero_fill(WORD_LEN), sum_weights);
     }
     println!("co2_weights: {:?}", co2_weights);
 

src/bin/day5.rs

@@ -72,7 +72,7 @@ fn parse_line(line: String) -> Line {
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file = File::open("inputs/day5.txt")?;
-    let mut lines: Vec<Line> = io::BufReader::new(file)
+    let lines: Vec<Line> = io::BufReader::new(file)
         .lines()
         .map(|l| parse_line(l.unwrap()))
         .collect();

src/bin/day6.rs

@@ -5,7 +5,7 @@ use std::vec::Vec;
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file = File::open("inputs/day6.txt")?;
-    let mut fishes: Vec<u64> = io::BufReader::new(file)
+    let fishes: Vec<u64> = io::BufReader::new(file)
         .lines()
         .nth(0)
         .unwrap()
@@ -15,7 +15,6 @@ fn main() -> Result<(), Box<dyn Error>> {
         .collect();
 
     let mut answer1 = 0;
-    let mut answer2 = 0;
 
     let mut population: Vec<u64> = Vec::new();
     population.resize(9, 0);
@@ -41,7 +40,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
     }
 
-    answer2 = population.iter().fold(0, |a, b| a + b);
+    let answer2 = population.iter().fold(0, |a, b| a + b);
 
     println!("Answer1: {}", answer1);
 

src/bin/day7.rs

@@ -5,7 +5,7 @@ use std::vec::Vec;
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file = File::open("inputs/day7.txt")?;
-    let mut crabs: Vec<i64> = io::BufReader::new(file)
+    let crabs: Vec<i64> = io::BufReader::new(file)
         .lines()
         .nth(0)
         .unwrap()

src/bin/day8.rs

@@ -32,7 +32,7 @@ fn parse_input(line: String) -> Line {
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file = File::open("inputs/day8.txt")?;
-    let mut lines: Vec<Line> = io::BufReader::new(file)
+    let lines: Vec<Line> = io::BufReader::new(file)
         .lines()
         .map(|l| parse_input(l.unwrap()))
         .collect();

src/bin/day9.rs

@@ -50,7 +50,7 @@ fn find_basin_size(x: i32, y: i32, visted: &mut HashSet<(i32, i32)>, map: &Vec<V
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file = File::open("inputs/day9.txt")?;
-    let mut map: Vec<Vec<u32>> = io::BufReader::new(file)
+    let map: Vec<Vec<u32>> = io::BufReader::new(file)
         .lines()
         .map(|l| {
             l.unwrap()