Merge pull request #1512 from pkazmier/patch-2

Update iter_find.md

Author: marioidival

src/fn/closures/closure_examples/iter_find.md

@@ -53,11 +53,14 @@ item, use `Iterator::position`.
 fn main() {
     let vec = vec![1, 9, 3, 3, 13, 2];
 
-    let index_of_first_even_number = vec.iter().position(|x| x % 2 == 0);
+    // `iter()` for vecs yields `&i32` and `position()` does not take a reference, so
+    // we have to destructure `&i32` to `i32`
+    let index_of_first_even_number = vec.iter().position(|&x| x % 2 == 0);
     assert_eq!(index_of_first_even_number, Some(5));
     
-    
-    let index_of_first_negative_number = vec.iter().position(|x| x < &0);
+    // `into_iter()` for vecs yields `i32` and `position()` does not take a reference, so
+    // we do not have to destructure    
+    let index_of_first_negative_number = vec.into_iter().position(|x| x < 0);
     assert_eq!(index_of_first_negative_number, None);
 }
 ```