update itertools

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "editor.formatOnSave": true
+}

Cargo.toml

@@ -6,7 +6,7 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0"
-itertools = "0.10"
+itertools = "0.11"
 lazy_static = "1.4"
 num-traits = "0.2"
 regex = "1.7"

src/common/file.rs

@@ -1,27 +1,17 @@
 use itertools::Itertools;
 use std::{fs, io};
 
-fn read_data(day_num: usize, file: &str) -> io::Result<String> {
+fn format_path(day_num: usize, file: &str) -> String {
-    fs::read_to_string(format!("data/day{day_num:02}/{file}"))
+    format!("data/day{day_num:02}/{file}")
 }
 
 pub fn read_lines(day_num: usize, file: &str) -> io::Result<Vec<String>> {
-    let lines = read_data(day_num, file)?;
+    Ok(fs::read_to_string(format_path(day_num, file))?
-    let x = lines
         .split('\n')
         .with_position()
         .filter_map(|line| match line {
-            itertools::Position::First(line)
+            (itertools::Position::Last, line) if line.is_empty() => None,
-            | itertools::Position::Middle(line)
+            (_, line) => Some(line.to_string()),
-            | itertools::Position::Only(line) => Some(line.to_owned()),
-            itertools::Position::Last(line) => {
-                if line.is_empty() {
-                    None
-                } else {
-                    Some(line.to_owned())
-                }
-            }
         })
-        .collect();
+        .collect())
-    Ok(x)
 }