Make the code a bit more functional

day1/src/main.rs

@@ -14,29 +14,25 @@ fn get_elves(raw: &str) -> Vec<Vec<u32>> {
 }
 
 fn get_elf_totals(elves: &Vec<Vec<u32>>) -> Vec<u32> {
-    let mut totals: Vec<u32> = Vec::new();
-
-    for elf in elves {
-        let sum = elf
+    elves
         .clone()
         .into_iter()
+        .map(|elf| {
+            elf.into_iter()
                 .reduce(|accum, item| accum + item)
-            .unwrap();
-
-        totals.push(sum)
-    }
-
-    totals
+                .unwrap()
+        })
+        .collect()
 }
 
 fn main() -> Result<(), Box<dyn Error>> {
     let file_str = fs::read_to_string("input.txt")?;
     let elves = get_elves(&file_str);
+
     let mut totals: Vec<u32> = get_elf_totals(&elves);
     totals.sort();
     totals.reverse();
 
-    // let most = totals.iter().max().unwrap();
     let most = totals[0];
     let top3 = totals[0] + totals[1] + totals[2];