lab 01

labs/01/sort.rs

@@ -0,0 +1,32 @@
+use std::env;
+use std::fs;
+use std::io;
+
+fn record(line: &str) -> Option<(String, String, u8)> {
+    let mut fields = line.split_whitespace();
+    let first_name = fields.next()?;
+    let last_name = fields.next()?;
+    let score: u8 = fields.next()?.parse().ok()?;
+
+    if score > 100 {
+        return None;
+    }
+
+    Some((first_name.to_string(), last_name.to_string(), score))
+}
+
+fn main() {
+    let input = match env::args().nth(1) {
+        Some(path) => fs::read_to_string(path).unwrap_or_default(),
+        None => io::read_to_string(io::stdin()).unwrap_or_default(),
+    };
+
+    let mut records: Vec<(String, String, u8)> = input.lines().filter_map(record).collect();
+    records.sort();
+    records.dedup();
+    records.sort_by_key(|r| r.2);
+
+    for (first_name, last_name, score) in records {
+        println!("{} {}, {}", score, last_name, first_name);
+    }
+}