diff options
| -rw-r--r-- | library/alloc/src/collections/btree/map.rs | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/library/alloc/src/collections/btree/map.rs b/library/alloc/src/collections/btree/map.rs index 73bc1c21d55..c4c75e46a2a 100644 --- a/library/alloc/src/collections/btree/map.rs +++ b/library/alloc/src/collections/btree/map.rs @@ -1093,6 +1093,9 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> { /// Moves all elements from `other` into `self`, leaving `other` empty. /// + /// If a key from `other` is already present in `self`, the respective + /// value from `self` will be overwritten with the respective value from `other`. + /// /// # Examples /// /// ``` @@ -1101,10 +1104,10 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> { /// let mut a = BTreeMap::new(); /// a.insert(1, "a"); /// a.insert(2, "b"); - /// a.insert(3, "c"); + /// a.insert(3, "c"); // Note: Key (3) also present in b. /// /// let mut b = BTreeMap::new(); - /// b.insert(3, "d"); + /// b.insert(3, "d"); // Note: Key (3) also present in a. /// b.insert(4, "e"); /// b.insert(5, "f"); /// @@ -1115,7 +1118,7 @@ impl<K, V, A: Allocator + Clone> BTreeMap<K, V, A> { /// /// assert_eq!(a[&1], "a"); /// assert_eq!(a[&2], "b"); - /// assert_eq!(a[&3], "d"); + /// assert_eq!(a[&3], "d"); // Note: "c" has been overwritten. /// assert_eq!(a[&4], "e"); /// assert_eq!(a[&5], "f"); /// ``` |