diff options
Diffstat (limited to 'rustlings/solutions')
6 files changed, 78 insertions, 12 deletions
diff --git a/rustlings/solutions/04_primitive_types/primitive_types1.rs b/rustlings/solutions/04_primitive_types/primitive_types1.rs index dcf2377..fac6ec0 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types1.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types1.rs @@ -1,4 +1,11 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + let is_morning = true; + if is_morning { + println!("Good morning!"); + } + + let is_evening = !is_morning; + if is_evening { + println!("Good evening!"); + } } diff --git a/rustlings/solutions/04_primitive_types/primitive_types2.rs b/rustlings/solutions/04_primitive_types/primitive_types2.rs index dcf2377..eecc680 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types2.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types2.rs @@ -1,4 +1,21 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + let my_first_initial = 'C'; + if my_first_initial.is_alphabetic() { + println!("Alphabetical!"); + } else if my_first_initial.is_numeric() { + println!("Numerical!"); + } else { + println!("Neither alphabetic nor numeric!"); + } + + // Example with an emoji. + let your_character = '🦀'; + + if your_character.is_alphabetic() { + println!("Alphabetical!"); + } else if your_character.is_numeric() { + println!("Numerical!"); + } else { + println!("Neither alphabetic nor numeric!"); + } } diff --git a/rustlings/solutions/04_primitive_types/primitive_types3.rs b/rustlings/solutions/04_primitive_types/primitive_types3.rs index dcf2377..8dd109f 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types3.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types3.rs @@ -1,4 +1,11 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + // An array with 100 elements of the value 42. + let a = [42; 100]; + + if a.len() >= 100 { + println!("Wow, that's a big array!"); + } else { + println!("Meh, I eat arrays like that for breakfast."); + panic!("Array not big enough, more elements needed"); + } } diff --git a/rustlings/solutions/04_primitive_types/primitive_types4.rs b/rustlings/solutions/04_primitive_types/primitive_types4.rs index dcf2377..4807e66 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types4.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types4.rs @@ -1,4 +1,23 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + // You can optionally experiment here. +} + +#[cfg(test)] +mod tests { + #[test] + fn slice_out_of_array() { + let a = [1, 2, 3, 4, 5]; + // 0 1 2 3 4 <- indices + // ------- + // | + // +--- slice + + // Note that the upper index 4 is excluded. + let nice_slice = &a[1..4]; + assert_eq!([2, 3, 4], nice_slice); + + // The upper index can be included by using the syntax `..=` (with `=` sign) + let nice_slice = &a[1..=3]; + assert_eq!([2, 3, 4], nice_slice); + } } diff --git a/rustlings/solutions/04_primitive_types/primitive_types5.rs b/rustlings/solutions/04_primitive_types/primitive_types5.rs index dcf2377..46d7ae8 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types5.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types5.rs @@ -1,4 +1,8 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + let cat = ("Furry McFurson", 3.5); + + // Destructuring the tuple. + let (name, age) = cat; + + println!("{name} is {age} years old"); } diff --git a/rustlings/solutions/04_primitive_types/primitive_types6.rs b/rustlings/solutions/04_primitive_types/primitive_types6.rs index dcf2377..9b7c277 100644 --- a/rustlings/solutions/04_primitive_types/primitive_types6.rs +++ b/rustlings/solutions/04_primitive_types/primitive_types6.rs @@ -1,4 +1,16 @@ fn main() { - // DON'T EDIT THIS SOLUTION FILE! - // It will be automatically filled after you finish the exercise. + // You can optionally experiment here. +} + +#[cfg(test)] +mod tests { + #[test] + fn indexing_tuple() { + let numbers = (1, 2, 3); + + // Tuple indexing syntax. + let second = numbers.1; + + assert_eq!(second, 2, "This is not the 2nd number in the tuple!"); + } } |