Revert "did some more"

This reverts commit b8bedd224f724c0d3197ac8031be3eb31134b3dc.

exercises/option/option1.rs

@@ -1,21 +1,23 @@
 // option1.rs
 // Make me compile! Execute `rustlings hint option1` for hints
 
+// I AM NOT DONE
+
 // you can modify anything EXCEPT for this function's signature
 fn print_number(maybe_number: Option<u16>) {
     println!("printing: {}", maybe_number.unwrap());
 }
 
 fn main() {
-    print_number(Some(13));
-    print_number(Some(99));
+    print_number(13);
+    print_number(99);
 
-    let mut numbers: [Option<u16>; 5] = [Some(0); 5];
+    let mut numbers: [Option<u16>; 5];
     for iter in 0..5 {
         let number_to_add: u16 = {
             ((iter * 1235) + 2) / (4 * 16)
         };
 
-        numbers[iter as usize] = Some(number_to_add);
+        numbers[iter as usize] = number_to_add;
     }
 }

exercises/option/option2.rs

@@ -1,14 +1,16 @@
 // option2.rs
 // Make me compile! Execute `rustlings hint option2` for hints
 
+// I AM NOT DONE
+
 fn main() {
     let optional_word = Some(String::from("rustlings"));
     // TODO: Make this an if let statement whose value is "Some" type
-    if let word = optional_word != None {
+    word = optional_word {
         println!("The word is: {}", word);
     } else {
         println!("The optional word doesn't contain anything");
-    };
+    }
 
     let mut optional_integers_vec: Vec<Option<i8>> = Vec::new();
     for x in 1..10 {
@@ -17,7 +19,7 @@ fn main() {
 
     // TODO: make this a while let statement - remember that vector.pop also adds another layer of Option<T>
     // You can stack `Option<T>`'s into while let and if let
-    while let Some(integer) = optional_integers_vec.pop() {
-        println!("current value: {:?}", integer);
+    integer = optional_integers_vec.pop() {
+        println!("current value: {}", integer);
     }
 }

exercises/option/option3.rs

@@ -1,6 +1,8 @@
 // option3.rs
 // Make me compile! Execute `rustlings hint option3` for hints
 
+// I AM NOT DONE
+
 struct Point {
     x: i32,
     y: i32,
@@ -10,7 +12,7 @@ fn main() {
     let y: Option<Point> = Some(Point { x: 100, y: 200 });
 
     match y {
-        Some(ref p) => println!("Co-ordinates are {},{} ", p.x, p.y),
+        Some(p) => println!("Co-ordinates are {},{} ", p.x, p.y),
         _ => println!("no match"),
     }
     y; // Fix without deleting this line.

exercises/quiz3.rs

@@ -7,6 +7,8 @@
 // we expect to get when we call `times_two` with a negative number.
 // No hints, you can do this :)
 
+// I AM NOT DONE
+
 pub fn times_two(num: i32) -> i32 {
     num * 2
 }
@@ -17,12 +19,12 @@ mod tests {
 
     #[test]
     fn returns_twice_of_positive_numbers() {
-        assert_eq!(times_two(4), 8);
+        assert_eq!(times_two(4), ???);
     }
 
     #[test]
     fn returns_twice_of_negative_numbers() {
         // TODO replace unimplemented!() with an assert for `times_two(-4)`
-        assert_eq!(times_two(-4), -8);
+        unimplemented!()
     }
 }

exercises/standard_library_types/arc1.rs

@@ -18,17 +18,19 @@
 // where the second TODO comment is. Try not to create any copies of the `numbers` Vec!
 // Execute `rustlings hint arc1` for hints :)
 
+// I AM NOT DONE
+
 #![forbid(unused_imports)] // Do not change this, (or the next) line.
 use std::sync::Arc;
 use std::thread;
 
 fn main() {
     let numbers: Vec<_> = (0..100u32).collect();
-    let shared_numbers: Arc<Vec<u32>> = Arc::from(numbers);// TODO
+    let shared_numbers = // TODO
     let mut joinhandles = Vec::new();
 
     for offset in 0..8 {
-        let child_numbers = Arc::clone(&shared_numbers);// TODO
+        let child_numbers = // TODO
         joinhandles.push(thread::spawn(move || {
             let sum: u32 = child_numbers.iter().filter(|n| *n % 8 == offset).sum();
             println!("Sum of offset {} is {}", offset, sum);

exercises/standard_library_types/box1.rs

@@ -16,9 +16,11 @@
 //
 // Execute `rustlings hint box1` for hints :)
 
+// I AM NOT DONE
+
 #[derive(PartialEq, Debug)]
 pub enum List {
-    Cons(i32, Box<List>),
+    Cons(i32, List),
     Nil,
 }
 
@@ -31,12 +33,11 @@ fn main() {
 }
 
 pub fn create_empty_list() -> List {
-    List::Nil
+    unimplemented!()
 }
 
 pub fn create_non_empty_list() -> List {
-    use List::Cons;
-    List::Cons(0, Box::new(Cons(1, Box::new(List::Nil))))
+    unimplemented!()
 }
 
 #[cfg(test)]

exercises/standard_library_types/iterators1.rs

@@ -8,15 +8,17 @@
 //
 // Execute `rustlings hint iterators1` for hints :D
 
+// I AM NOT DONE
+
 fn main () {
     let my_fav_fruits = vec!["banana", "custard apple", "avocado", "peach", "raspberry"];
 
-    let mut my_iterable_fav_fruits = my_fav_fruits.iter();   // TODO: Step 1
+    let mut my_iterable_fav_fruits = ???;   // TODO: Step 1
 
     assert_eq!(my_iterable_fav_fruits.next(), Some(&"banana"));
-    assert_eq!(my_iterable_fav_fruits.next(), Some(&"custard apple"));     // TODO: Step 2
+    assert_eq!(my_iterable_fav_fruits.next(), ???);     // TODO: Step 2
     assert_eq!(my_iterable_fav_fruits.next(), Some(&"avocado"));
-    assert_eq!(my_iterable_fav_fruits.next(), Some(&"peach"));     // TODO: Step 3
+    assert_eq!(my_iterable_fav_fruits.next(), ???);     // TODO: Step 3
     assert_eq!(my_iterable_fav_fruits.next(), Some(&"raspberry"));
-    assert_eq!(my_iterable_fav_fruits.next(), None);     // TODO: Step 4
+    assert_eq!(my_iterable_fav_fruits.next(), ???);     // TODO: Step 4
 }

exercises/standard_library_types/iterators2.rs

@@ -3,6 +3,8 @@
 // can offer. Follow the steps to complete the exercise.
 // As always, there are hints if you execute `rustlings hint iterators2`!
 
+// I AM NOT DONE
+
 // Step 1.
 // Complete the `capitalize_first` function.
 // "hello" -> "Hello"
@@ -10,12 +12,7 @@ pub fn capitalize_first(input: &str) -> String {
     let mut c = input.chars();
     match c.next() {
         None => String::new(),
-        Some(first) => {
-            let mut new_string = first.to_uppercase().to_string();
-            let remaining_str = c.as_str();
-            new_string.push_str(remaining_str);
-            new_string
-        }
+        Some(first) => ???,
     }
 }
 
@@ -24,12 +21,7 @@ pub fn capitalize_first(input: &str) -> String {
 // Return a vector of strings.
 // ["hello", "world"] -> ["Hello", "World"]
 pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> {
-    let mut result_vec: Vec<String> = vec![];
-
-    for word in words {
-        result_vec.push(capitalize_first(word));
-    }
-    result_vec
+    vec![]
 }
 
 // Step 3.
@@ -37,7 +29,7 @@ pub fn capitalize_words_vector(words: &[&str]) -> Vec<String> {
 // Return a single string.
 // ["hello", " ", "world"] -> "Hello World"
 pub fn capitalize_words_string(words: &[&str]) -> String {
-    capitalize_words_vector(words).join("")
+    String::new()
 }
 
 #[cfg(test)]

exercises/standard_library_types/iterators3.rs

@@ -6,6 +6,8 @@
 //    list_of_results functions.
 // Execute `rustlings hint iterators3` to get some hints!
 
+// I AM NOT DONE
+
 #[derive(Debug, PartialEq, Eq)]
 pub enum DivisionError {
     NotDivisible(NotDivisibleError),
@@ -20,31 +22,20 @@ pub struct NotDivisibleError {
 
 // Calculate `a` divided by `b` if `a` is evenly divisible by `b`.
 // Otherwise, return a suitable error.
-pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> {
-    if b == 0 {
-        return Err(DivisionError::DivideByZero)
-    } else if a % b != 0 {
-        return Err(DivisionError::NotDivisible(NotDivisibleError {dividend: a, divisor: b}))
-    }
-    return Ok(a / b)
-}
+pub fn divide(a: i32, b: i32) -> Result<i32, DivisionError> {}
 
 // Complete the function and return a value of the correct type so the test passes.
 // Desired output: Ok([1, 11, 1426, 3])
-fn result_with_list() -> Result<Vec<i32>, DivisionError> {
+fn result_with_list() -> () {
     let numbers = vec![27, 297, 38502, 81];
-    let division_results: Result<Vec<i32>, DivisionError> = numbers.into_iter().map(|n| divide(n, 27)).collect();
-
-    division_results
+    let division_results = numbers.into_iter().map(|n| divide(n, 27));
 }
 
 // Complete the function and return a value of the correct type so the test passes.
 // Desired output: [Ok(1), Ok(11), Ok(1426), Ok(3)]
-fn list_of_results() -> Vec<Result<i32, DivisionError>> {
+fn list_of_results() -> () {
     let numbers = vec![27, 297, 38502, 81];
-    let division_results: Vec<Result<i32, DivisionError>> = numbers.into_iter().map(|n| divide(n, 27)).collect();
-
-    division_results
+    let division_results = numbers.into_iter().map(|n| divide(n, 27));
 }
 
 #[cfg(test)]

exercises/standard_library_types/iterators4.rs

@@ -1,5 +1,7 @@
 // iterators4.rs
 
+// I AM NOT DONE
+
 pub fn factorial(num: u64) -> u64 {
     // Complete this function to return the factorial of num
     // Do not use:
@@ -10,10 +12,6 @@ pub fn factorial(num: u64) -> u64 {
     // For an extra challenge, don't use:
     // - recursion
     // Execute `rustlings hint iterators4` for hints.
-    match (1..num + 1).map(|x| x).reduce(|a, b| a * b) {
-        Some(result) => result,
-        None => panic!("something went really wrong"),
-    }
 }
 
 #[cfg(test)]

exercises/tests/tests1.rs

@@ -6,10 +6,12 @@
 // This test has a problem with it -- make the test compile! Make the test
 // pass! Make the test fail! Execute `rustlings hint tests1` for hints :)
 
+// I AM NOT DONE
+
 #[cfg(test)]
 mod tests {
     #[test]
     fn you_can_assert() {
-        assert!(true);
+        assert!();
     }
 }

exercises/tests/tests2.rs

@@ -2,10 +2,12 @@
 // This test has a problem with it -- make the test compile! Make the test
 // pass! Make the test fail! Execute `rustlings hint tests2` for hints :)
 
+// I AM NOT DONE
+
 #[cfg(test)]
 mod tests {
     #[test]
     fn you_can_assert_eq() {
-        assert_eq!(1, 1);
+        assert_eq!();
     }
 }

exercises/tests/tests3.rs

@@ -4,6 +4,8 @@
 // we expect to get when we call `is_even(5)`.
 // Execute `rustlings hint tests3` for hints :)
 
+// I AM NOT DONE
+
 pub fn is_even(num: i32) -> bool {
     num % 2 == 0
 }
@@ -14,11 +16,11 @@ mod tests {
 
     #[test]
     fn is_true_when_even() {
-        assert!(is_even(2));
+        assert!();
     }
 
     #[test]
     fn is_false_when_odd() {
-        assert!(is_even(3) == false);
+        assert!();
     }
 }

exercises/traits/traits1.rs

@@ -8,15 +8,14 @@
 // which appends "Bar" to any object
 // implementing this trait.
 
+// I AM NOT DONE
+
 trait AppendBar {
     fn append_bar(self) -> Self;
 }
 
 impl AppendBar for String {
-    fn append_bar(mut self) -> Self {
-        self.push_str("Bar");
-        self
-    }
+    //Add your code here
 }
 
 fn main() {

exercises/traits/traits2.rs

@@ -10,26 +10,21 @@
 // No boiler plate code this time,
 // you can do this!
 
+// I AM NOT DONE
+
 trait AppendBar {
     fn append_bar(self) -> Self;
 }
 
 //TODO: Add your code here
 
-impl AppendBar for Vec<String> {
-    fn append_bar(mut self) -> Self {
-        self.push(String::from("Bar"));
-        self
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
 
     #[test]
     fn is_vec_pop_eq_bar() {
-        let mut foo: Vec<String> = vec![String::from("Foo")].append_bar();
+        let mut foo = vec![String::from("Foo")].append_bar();
         assert_eq!(foo.pop().unwrap(), String::from("Bar"));
         assert_eq!(foo.pop().unwrap(), String::from("Foo"));
     }