update itertools

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