part 05: clarify exercise

diff --git a/src/part05.rs b/src/part05.rs
index 7324d13361111109ab482ee3b82d43051b7ee5b4..b3b428ec03c67d65e155d1d33fa23d7d34594554 100644 (file)
--- a/src/part05.rs
+++ b/src/part05.rs
@@ -111,7 +111,7 @@ impl<T: Clone> Clone for SomethingOrNothing<T> {
 //@ `#[derive(Clone)]` right before the definition of `SomethingOrNothing`.
 
 // **Exercise 05.2**: Write some more functions on `BigInt`. What about a function that returns the number of
-// digits? The number of non-zero digits? The smallest/largest digit?
+// digits? The number of non-zero digits? The smallest/largest digit? Of course, these should all just borrow `self`.
 
 // ## Mutation + aliasing considered harmful (part 2)
 //@ Now that we know how to borrow a part of an `enum` (like `v` above), there's another example for why we

diff --git a/workspace/src/part05.rs b/workspace/src/part05.rs
index d3c95443377606f4118b04e7cc22909835aaaa88..f1c558720df94135f682ec0d191b1265db91b3ba 100644 (file)
--- a/workspace/src/part05.rs
+++ b/workspace/src/part05.rs
@@ -59,7 +59,7 @@ impl<T: Clone> Clone for SomethingOrNothing<T> {
 }
 
 // **Exercise 05.2**: Write some more functions on `BigInt`. What about a function that returns the number of
-// digits? The number of non-zero digits? The smallest/largest digit?
+// digits? The number of non-zero digits? The smallest/largest digit? Of course, these should all just borrow `self`.
 
 // ## Mutation + aliasing considered harmful (part 2)
 enum Variant {