From bd36552e2f3cb5a3b8e76719d80b80fdf54d11f9 Mon Sep 17 00:00:00 2001 From: Richard Hoffmann Date: Sat, 15 Jul 2023 21:23:27 +0200 Subject: [PATCH] solved primitive types, vecs and ifs --- exercises/if/if1.rs | 7 +++++-- exercises/if/if2.rs | 6 +++--- exercises/primitive_types/primitive_types1.rs | 4 +--- exercises/primitive_types/primitive_types2.rs | 8 +++----- exercises/primitive_types/primitive_types3.rs | 5 ++--- exercises/primitive_types/primitive_types4.rs | 4 +--- exercises/primitive_types/primitive_types5.rs | 4 +--- exercises/primitive_types/primitive_types6.rs | 7 ++----- exercises/quiz1.rs | 10 +++++++--- exercises/vecs/vecs1.rs | 5 +---- exercises/vecs/vecs2.rs | 16 ++++++++-------- 11 files changed, 34 insertions(+), 42 deletions(-) diff --git a/exercises/if/if1.rs b/exercises/if/if1.rs index 587e03f8..06dcb3df 100644 --- a/exercises/if/if1.rs +++ b/exercises/if/if1.rs @@ -1,9 +1,12 @@ // if1.rs // Execute `rustlings hint if1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - pub fn bigger(a: i32, b: i32) -> i32 { + if a > b { + a + } else { + b + } // Complete this function to return the bigger number! // Do not use: // - another function call diff --git a/exercises/if/if2.rs b/exercises/if/if2.rs index effddbb6..129a4a25 100644 --- a/exercises/if/if2.rs +++ b/exercises/if/if2.rs @@ -4,13 +4,13 @@ // Step 2: Get the bar_for_fuzz and default_to_baz tests passing! // Execute `rustlings hint if2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - pub fn foo_if_fizz(fizzish: &str) -> &str { if fizzish == "fizz" { "foo" + } else if fizzish == "fuzz" { + "bar" } else { - 1 + "baz" } } diff --git a/exercises/primitive_types/primitive_types1.rs b/exercises/primitive_types/primitive_types1.rs index 09121392..ea56cd36 100644 --- a/exercises/primitive_types/primitive_types1.rs +++ b/exercises/primitive_types/primitive_types1.rs @@ -2,8 +2,6 @@ // Fill in the rest of the line that has code missing! // No hints, there's no tricks, just get used to typing these :) -// I AM NOT DONE - fn main() { // Booleans (`bool`) @@ -12,7 +10,7 @@ fn main() { println!("Good morning!"); } - let // Finish the rest of this line like the example! Or make it be false! + let is_evening: bool = false; // Finish the rest of this line like the example! Or make it be false! if is_evening { println!("Good evening!"); } diff --git a/exercises/primitive_types/primitive_types2.rs b/exercises/primitive_types/primitive_types2.rs index 8730baab..c1db4f4e 100644 --- a/exercises/primitive_types/primitive_types2.rs +++ b/exercises/primitive_types/primitive_types2.rs @@ -2,8 +2,6 @@ // Fill in the rest of the line that has code missing! // No hints, there's no tricks, just get used to typing these :) -// I AM NOT DONE - fn main() { // Characters (`char`) @@ -18,9 +16,9 @@ fn main() { println!("Neither alphabetic nor numeric!"); } - let // Finish this line like the example! What's your favorite character? - // Try a letter, try a number, try a special character, try a character - // from a different language than your own, try an emoji! + let your_character: char = '8'; // Finish this line like the example! What's your favorite character? + // Try a letter, try a number, try a special character, try a character + // from a different language than your own, try an emoji! if your_character.is_alphabetic() { println!("Alphabetical!"); } else if your_character.is_numeric() { diff --git a/exercises/primitive_types/primitive_types3.rs b/exercises/primitive_types/primitive_types3.rs index fa7d019a..2b86273c 100644 --- a/exercises/primitive_types/primitive_types3.rs +++ b/exercises/primitive_types/primitive_types3.rs @@ -2,10 +2,9 @@ // Create an array with at least 100 elements in it where the ??? is. // Execute `rustlings hint primitive_types3` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { - let a = ??? + let a: [i32; 200] = [0; 200]; + // let a = Vec::from_iter([0..200]); if a.len() >= 100 { println!("Wow, that's a big array!"); diff --git a/exercises/primitive_types/primitive_types4.rs b/exercises/primitive_types/primitive_types4.rs index 71fa243c..e3371784 100644 --- a/exercises/primitive_types/primitive_types4.rs +++ b/exercises/primitive_types/primitive_types4.rs @@ -2,13 +2,11 @@ // Get a slice out of Array a where the ??? is so that the test passes. // Execute `rustlings hint primitive_types4` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[test] fn slice_out_of_array() { let a = [1, 2, 3, 4, 5]; - let nice_slice = ??? + let nice_slice = &a[1..4]; assert_eq!([2, 3, 4], nice_slice) } diff --git a/exercises/primitive_types/primitive_types5.rs b/exercises/primitive_types/primitive_types5.rs index 4fd9141f..5cba3c15 100644 --- a/exercises/primitive_types/primitive_types5.rs +++ b/exercises/primitive_types/primitive_types5.rs @@ -2,11 +2,9 @@ // Destructure the `cat` tuple so that the println will work. // Execute `rustlings hint primitive_types5` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn main() { let cat = ("Furry McFurson", 3.5); - let /* your pattern here */ = cat; + let (name, age) = cat; println!("{} is {} years old.", name, age); } diff --git a/exercises/primitive_types/primitive_types6.rs b/exercises/primitive_types/primitive_types6.rs index ddf8b423..4d614e57 100644 --- a/exercises/primitive_types/primitive_types6.rs +++ b/exercises/primitive_types/primitive_types6.rs @@ -3,14 +3,11 @@ // You can put the expression for the second element where ??? is so that the test passes. // Execute `rustlings hint primitive_types6` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - #[test] fn indexing_tuple() { let numbers = (1, 2, 3); // Replace below ??? with the tuple indexing syntax. - let second = ???; + let second = numbers.1; - assert_eq!(2, second, - "This is not the 2nd number in the tuple!") + assert_eq!(2, second, "This is not the 2nd number in the tuple!") } diff --git a/exercises/quiz1.rs b/exercises/quiz1.rs index dbb5cdc9..ee1fa962 100644 --- a/exercises/quiz1.rs +++ b/exercises/quiz1.rs @@ -10,10 +10,14 @@ // Write a function that calculates the price of an order of apples given // the quantity bought. No hints this time! -// I AM NOT DONE - // Put your function here! -// fn calculate_price_of_apples { +fn calculate_price_of_apples(num: i32) -> i32 { + if num > 40 { + num + } else { + num * 2 + } +} // Don't modify this function! #[test] diff --git a/exercises/vecs/vecs1.rs b/exercises/vecs/vecs1.rs index 4e8c4cbb..5fb0b7a1 100644 --- a/exercises/vecs/vecs1.rs +++ b/exercises/vecs/vecs1.rs @@ -4,12 +4,9 @@ // Make me compile and pass the test! // Execute `rustlings hint vecs1` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn array_and_vec() -> ([i32; 4], Vec) { let a = [10, 20, 30, 40]; // a plain array - let v = // TODO: declare your vector here with the macro for vectors - + let v = vec![10, 20, 30, 40]; (a, v) } diff --git a/exercises/vecs/vecs2.rs b/exercises/vecs/vecs2.rs index 1ea26071..eba7e29b 100644 --- a/exercises/vecs/vecs2.rs +++ b/exercises/vecs/vecs2.rs @@ -6,13 +6,11 @@ // // Execute `rustlings hint vecs2` or use the `hint` watch subcommand for a hint. -// I AM NOT DONE - fn vec_loop(mut v: Vec) -> Vec { for element in v.iter_mut() { // TODO: Fill this up so that each element in the Vec `v` is // multiplied by 2. - ??? + *element = *element * 2; } // At this point, `v` should be equal to [4, 8, 12, 16, 20]. @@ -20,11 +18,13 @@ fn vec_loop(mut v: Vec) -> Vec { } fn vec_map(v: &Vec) -> Vec { - v.iter().map(|element| { - // TODO: Do the same thing as above - but instead of mutating the - // Vec, you can just return the new number! - ??? - }).collect() + v.iter() + .map(|element| { + // TODO: Do the same thing as above - but instead of mutating the + // Vec, you can just return the new number! + element * 2 + }) + .collect() } #[cfg(test)]