From 4394d0902c11cb110103bb35a16bf7bf3b780cdf Mon Sep 17 00:00:00 2001 From: Alex Kuznetsov Date: Tue, 5 Jul 2022 10:25:18 -0500 Subject: [PATCH 1/2] into_iter-moves-elements --- src/fn/closures/closure_examples/iter_any.md | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/fn/closures/closure_examples/iter_any.md b/src/fn/closures/closure_examples/iter_any.md index 9fd35fbce1..4730375dc0 100644 --- a/src/fn/closures/closure_examples/iter_any.md +++ b/src/fn/closures/closure_examples/iter_any.md @@ -29,6 +29,13 @@ fn main() { // `into_iter()` for vecs yields `i32`. No destructuring required. println!("2 in vec2: {}", vec2.into_iter().any(| x| x == 2)); + // `iter()` does not move `vec1` or its elements, so it can be used again + println!("vec1 len: {}", vec1.len()); + // `into_iter()` does move `vec2`, so it cannot be used again + // Try uncommenting the lines below to see the compiler complaining: + // println!("First element of vec2 is: {}", vec2[0]); + //println!("vec2 len: {}", vec2.len()); + let array1 = [1, 2, 3]; let array2 = [4, 5, 6]; From 139a33e575f54462953ba6e77ef1dd9755324ae6 Mon Sep 17 00:00:00 2001 From: Alex Kuznetsov Date: Thu, 7 Jul 2022 08:10:49 -0500 Subject: [PATCH 2/2] fix-comments --- src/fn/closures/closure_examples/iter_any.md | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/src/fn/closures/closure_examples/iter_any.md b/src/fn/closures/closure_examples/iter_any.md index 4730375dc0..d2ad929f3d 100644 --- a/src/fn/closures/closure_examples/iter_any.md +++ b/src/fn/closures/closure_examples/iter_any.md @@ -29,12 +29,13 @@ fn main() { // `into_iter()` for vecs yields `i32`. No destructuring required. println!("2 in vec2: {}", vec2.into_iter().any(| x| x == 2)); - // `iter()` does not move `vec1` or its elements, so it can be used again + // `iter()` only borrows `vec1` and its elements, so they can be used again println!("vec1 len: {}", vec1.len()); - // `into_iter()` does move `vec2`, so it cannot be used again - // Try uncommenting the lines below to see the compiler complaining: + println!("First element of vec1 is: {}", vec1[0]); + // `into_iter()` does move `vec2` and its elements, so they cannot be used again // println!("First element of vec2 is: {}", vec2[0]); - //println!("vec2 len: {}", vec2.len()); + // println!("vec2 len: {}", vec2.len()); + // TODO: uncomment two lines above and see compiler errors. let array1 = [1, 2, 3]; let array2 = [4, 5, 6];