diff --git a/src/map.rs b/src/map.rs
index 43d16b703..88a826582 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -184,7 +184,7 @@ pub enum DefaultHashBuilder {}
 /// use hashbrown::HashMap;
 ///
 /// let timber_resources: HashMap<&str, i32> = [("Norway", 100), ("Denmark", 50), ("Iceland", 10)]
-///     .iter().cloned().collect();
+///     .into_iter().collect();
 /// // use the values stored in map
 /// ```
 pub struct HashMap<K, V, S = DefaultHashBuilder, A: Allocator = Global> {
diff --git a/src/set.rs b/src/set.rs
index 0f1aad485..0ade464dc 100644
--- a/src/set.rs
+++ b/src/set.rs
@@ -102,7 +102,7 @@ use crate::raw::{Allocator, Global, RawExtractIf};
 /// use hashbrown::HashSet;
 ///
 /// let viking_names: HashSet<&'static str> =
-///     [ "Einar", "Olaf", "Harald" ].iter().cloned().collect();
+///     [ "Einar", "Olaf", "Harald" ].into_iter().collect();
 /// // use the values stored in the set
 /// ```
 ///
@@ -335,7 +335,7 @@ impl<T, S, A: Allocator> HashSet<T, S, A> {
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let mut set: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let mut set: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// assert!(!set.is_empty());
     ///
     /// // print 1, 2, 3 in an arbitrary order
@@ -362,7 +362,7 @@ impl<T, S, A: Allocator> HashSet<T, S, A> {
     /// use hashbrown::HashSet;
     ///
     /// let xs = [1,2,3,4,5,6];
-    /// let mut set: HashSet<i32> = xs.iter().cloned().collect();
+    /// let mut set: HashSet<i32> = xs.into_iter().collect();
     /// set.retain(|&k| k % 2 == 0);
     /// assert_eq!(set.len(), 3);
     /// ```
@@ -724,8 +724,8 @@ where
     ///
     /// ```
     /// use hashbrown::HashSet;
-    /// let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
-    /// let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();
+    /// let a: HashSet<_> = [1, 2, 3].into_iter().collect();
+    /// let b: HashSet<_> = [4, 2, 3, 4].into_iter().collect();
     ///
     /// // Can be seen as `a - b`.
     /// for x in a.difference(&b) {
@@ -755,8 +755,8 @@ where
     ///
     /// ```
     /// use hashbrown::HashSet;
-    /// let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
-    /// let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();
+    /// let a: HashSet<_> = [1, 2, 3].into_iter().collect();
+    /// let b: HashSet<_> = [4, 2, 3, 4].into_iter().collect();
     ///
     /// // Print 1, 4 in arbitrary order.
     /// for x in a.symmetric_difference(&b) {
@@ -783,8 +783,8 @@ where
     ///
     /// ```
     /// use hashbrown::HashSet;
-    /// let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
-    /// let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();
+    /// let a: HashSet<_> = [1, 2, 3].into_iter().collect();
+    /// let b: HashSet<_> = [4, 2, 3, 4].into_iter().collect();
     ///
     /// // Print 2, 3 in arbitrary order.
     /// for x in a.intersection(&b) {
@@ -814,8 +814,8 @@ where
     ///
     /// ```
     /// use hashbrown::HashSet;
-    /// let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
-    /// let b: HashSet<_> = [4, 2, 3, 4].iter().cloned().collect();
+    /// let a: HashSet<_> = [1, 2, 3].into_iter().collect();
+    /// let b: HashSet<_> = [4, 2, 3, 4].into_iter().collect();
     ///
     /// // Print 1, 2, 3, 4 in arbitrary order.
     /// for x in a.union(&b) {
@@ -850,7 +850,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let set: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let set: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// assert_eq!(set.contains(&1), true);
     /// assert_eq!(set.contains(&4), false);
     /// ```
@@ -876,7 +876,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let set: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let set: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// assert_eq!(set.get(&2), Some(&2));
     /// assert_eq!(set.get(&4), None);
     /// ```
@@ -903,7 +903,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let mut set: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let mut set: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// assert_eq!(set.len(), 3);
     /// assert_eq!(set.get_or_insert(2), &2);
     /// assert_eq!(set.get_or_insert(100), &100);
@@ -1034,7 +1034,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let a: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let a: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// let mut b = HashSet::new();
     ///
     /// assert_eq!(a.is_disjoint(&b), true);
@@ -1055,7 +1055,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let sup: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let sup: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// let mut set = HashSet::new();
     ///
     /// assert_eq!(set.is_subset(&sup), true);
@@ -1076,7 +1076,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let sub: HashSet<_> = [1, 2].iter().cloned().collect();
+    /// let sub: HashSet<_> = [1, 2].into_iter().collect();
     /// let mut set = HashSet::new();
     ///
     /// assert_eq!(set.is_superset(&sub), false);
@@ -1205,7 +1205,7 @@ where
     /// ```
     /// use hashbrown::HashSet;
     ///
-    /// let mut set: HashSet<_> = [1, 2, 3].iter().cloned().collect();
+    /// let mut set: HashSet<_> = [1, 2, 3].into_iter().collect();
     /// assert_eq!(set.take(&2), Some(2));
     /// assert_eq!(set.take(&2), None);
     /// ```