day08 clean up with itertools' chunks

src/tasks/day08.rs

@@ -3,15 +3,14 @@ use itertools::Itertools;
 #[allow(dead_code)]
 pub fn run() {
     let size = 25 * 6;
-    let raw: Vec<u8> = std::fs::read_to_string("input/day08.txt")
+    let images: Vec<Vec<u8>> = std::fs::read_to_string("input/day08.txt")
         .unwrap()
         .chars()
         .map(|c| c.to_digit(10).unwrap() as u8)
+        .chunks(size)
+        .into_iter()
+        .map(|chunk| chunk.collect())
         .collect();
-    let mut images = Vec::<Vec<u8>>::new();
-    for chunk in raw.chunks(size) {
-        images.push(chunk.iter().map(|it| *it).collect());
-    }
     task1(&images);
     task2(&images);
 }
@@ -31,11 +30,10 @@ fn task2(images: &Vec<Vec<u8>>) {
     let result: Vec<u8> = (0..n_pixels)
         .map(|pix| images.iter().find(|layer| layer[pix] != 2).unwrap()[pix])
         .collect();
-    for row in result.chunks(25) {
+    for row in result.iter().chunks(25).into_iter() {
         println!(
             "{}",
-            row.iter()
-                .map(|it| if *it == 0 {
+            row.map(|it| if *it == 0 {
                 format!(" ")
             } else {
                 format!("{}", it)