feat: completed solutions

exercises/23_conversions/from_into.rs

@@ -34,7 +34,18 @@ impl Default for Person {
 // 5. Parse the second element from the split operation into a `u8` as the age.
 // 6. If parsing the age fails, return the default of `Person`.
 impl From<&str> for Person {
-    fn from(s: &str) -> Self {}
+    fn from(s: &str) -> Self {
+        match s.split(",").collect::<Vec<&str>>().as_slice() {
+            [name, age] if (!name.is_empty() && !age.is_empty()) => match age.parse::<u8>() {
+                Ok(age) => Person {
+                    name: name.to_string(),
+                    age,
+                },
+                Err(_) => Person::default(),
+            },
+            _ => Person::default(),
+        }
+    }
 }
 
 fn main() {