feat: Added iterators1.rs exercise
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@ -3,5 +3,3 @@ For the Box exercise check out the chapter [Using Box to Point to Data on the He
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For the Arc exercise check out the chapter [Shared-State Concurrency](https://doc.rust-lang.org/book/ch16-03-shared-state.html) of the Rust Book.
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For the Arc exercise check out the chapter [Shared-State Concurrency](https://doc.rust-lang.org/book/ch16-03-shared-state.html) of the Rust Book.
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For the Iterator exercise check out the chapters [Iterator](https://doc.rust-lang.org/book/ch13-02-iterators.html) of the Rust Book and the [Iterator documentation](https://doc.rust-lang.org/stable/std/iter/).
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For the Iterator exercise check out the chapters [Iterator](https://doc.rust-lang.org/book/ch13-02-iterators.html) of the Rust Book and the [Iterator documentation](https://doc.rust-lang.org/stable/std/iter/).
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Do not adjust your monitors-- iterators1.rs is indeed missing. Iterators is a challenging topic, so we're leaving space for a simpler exercise!
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24
exercises/standard_library_types/iterators1.rs
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24
exercises/standard_library_types/iterators1.rs
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@ -0,0 +1,24 @@
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// iterators1.rs
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//
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// Make me compile by filling in the `???`s
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//
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// When performing operations on elements within a collection, iterators are essential.
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// This module helps you get familiar with the structure of using an iterator and
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// how to go through elements within an iterable collection.
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//
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// Execute `rustlings hint iterators1` for hints :D
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// I AM NOT DONE
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fn main () {
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let my_fav_fruits = vec!["banana", "custard apple", "avocado", "peach", "raspberry"];
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let mut my_iterable_fav_fruits = ???; // TODO: Step 1
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assert_eq!(my_iterable_fav_fruits.next(), Some(&"banana"));
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assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 2
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assert_eq!(my_iterable_fav_fruits.next(), Some(&"avocado"));
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assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 2.1
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assert_eq!(my_iterable_fav_fruits.next(), Some(&"raspberry"));
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assert_eq!(my_iterable_fav_fruits.next(), ???); // TODO: Step 3
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}
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21
info.toml
21
info.toml
@ -644,6 +644,27 @@ inside the loop but still in the main thread.
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`child_numbers` should be a clone of the Arc of the numbers instead of a
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`child_numbers` should be a clone of the Arc of the numbers instead of a
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thread-local copy of the numbers."""
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thread-local copy of the numbers."""
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[[exercises]]
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name = "iterators1"
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path = "exercises/standard_library_types/iterators1.rs"
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mode = "compile"
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hint = """
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Step 1:
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We need to apply something to the collection `my_fav_fruits` before we start to go through
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it. What could that be? Take a look at the struct definition for a vector for inspiration:
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https://doc.rust-lang.org/std/vec/struct.Vec.html.
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Step 2 & step 2.1:
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Very similar to the lines above an below. You've got this!
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Step 3:
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An iterator goes through all elements in a collection, but what if we've run out of
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elements? What should we expect here? If you're stuck, take a look at
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https://doc.rust-lang.org/std/iter/trait.Iterator.html for some ideas.
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"""
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[[exercises]]
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[[exercises]]
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name = "iterators2"
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name = "iterators2"
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path = "exercises/standard_library_types/iterators2.rs"
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path = "exercises/standard_library_types/iterators2.rs"
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