WAiting for approval of this function.

src/prob2/mod.rs

@@ -74,3 +74,19 @@ pub fn round_score(play: char, counter_play: char) -> i32 {
         }
     }
 }
+
+pub fn solve_part1(file_path: &str) -> i32 {
+    let contents =
+        std::fs::read_to_string(file_path).expect("Please provide a text file as an argument.");
+    let lines: Vec<&str> = contents.split('\n').collect();
+    lines
+        .iter()
+        .map(|line| {
+            let first: char = line.chars().nth(0).unwrap_or('R');
+            let last: char = line.chars().nth(2).unwrap_or('R');
+            round_score(first, last)
+        })
+        .collect::<Vec<i32>>()
+        .iter()
+        .sum()
+}