completed till 06/07

exercises/06_ticket_management/01_arrays/src/lib.rs

@@ -1,7 +1,7 @@
 // TODO: Flesh out the `WeekTemperatures` struct and its method implementations to pass the tests.
 
 pub struct WeekTemperatures {
-    // TODO
+    temps: [Option<i32>; 7],
 }
 
 pub enum Weekday {
@@ -16,15 +16,15 @@ pub enum Weekday {
 
 impl WeekTemperatures {
     pub fn new() -> Self {
-        todo!()
+        WeekTemperatures { temps: [None; 7] }
     }
 
     pub fn get_temperature(&self, day: Weekday) -> Option<i32> {
-        todo!()
+        return self.temps[day as usize];
     }
 
     pub fn set_temperature(&mut self, day: Weekday, temperature: i32) {
-        todo!()
+        self.temps[day as usize] = Some(temperature);
     }
 }
 

exercises/06_ticket_management/02_vec/src/lib.rs

@@ -15,7 +15,11 @@ pub fn fibonacci(n: u32) -> u32 {
     //
     // Hint: use a `Vec` to memoize the results you have already calculated
     // so that you don't have to recalculate them several times.
-    todo!()
+    let mut fibNums = vec![0, 1];
+    for i in 2..=n {
+        fibNums.push(fibNums[(i - 1) as usize] + fibNums[(i - 2) as usize]);
+    }
+    fibNums[(n) as usize]
 }
 
 #[cfg(test)]

exercises/06_ticket_management/03_resizing/src/lib.rs

@@ -12,6 +12,6 @@ mod tests {
         // Can you guess what the new capacity will be?
         // Beware that the standard library makes no guarantees about the
         // algorithm used to resize the vector, so this may change in the future.
-        assert_eq!(v.capacity(), todo!());
+        assert_eq!(v.capacity(), 4);
     }
 }

exercises/06_ticket_management/04_iterators/src/lib.rs

@@ -13,6 +13,14 @@ pub struct TicketStore {
     tickets: Vec<Ticket>,
 }
 
+impl IntoIterator for TicketStore {
+    type Item = Ticket;
+    type IntoIter = std::vec::IntoIter<Self::Item>;
+    fn into_iter(self) -> Self::IntoIter {
+        return self.tickets.into_iter();
+    }
+}
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct Ticket {
     pub title: TicketTitle,

exercises/06_ticket_management/05_iter/src/lib.rs

@@ -17,6 +17,20 @@ pub struct Ticket {
     status: Status,
 }
 
+impl TicketStore {
+    // type Itr=std::vec::I
+    pub fn iter(&self) -> std::slice::Iter<Ticket> {
+        self.tickets.iter()
+    }
+}
+
+// impl Iterator for TicketStore {
+//     type Item = Ticket;
+//     fn next(&mut self) -> Self::Item {
+
+//     }
+// }
+
 #[derive(Clone, Debug, Copy, PartialEq)]
 pub enum Status {
     ToDo,

exercises/06_ticket_management/06_lifetimes/src/lib.rs

@@ -6,6 +6,14 @@ pub struct TicketStore {
     tickets: Vec<Ticket>,
 }
 
+impl<'a> IntoIterator for &'a TicketStore {
+    type Item = &'a Ticket;
+    type IntoIter = std::slice::Iter<'a, Ticket>;
+    fn into_iter(self) -> Self::IntoIter {
+        self.tickets.iter()
+    }
+}
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct Ticket {
     pub title: TicketTitle,

exercises/06_ticket_management/07_combinators/src/lib.rs

@@ -7,6 +7,18 @@ pub struct TicketStore {
     tickets: Vec<Ticket>,
 }
 
+impl TicketStore {
+    fn to_dos(&self) -> Vec<&Ticket> {
+        self.tickets
+            .iter()
+            .filter(|&a| match a.status {
+                Status::ToDo => true,
+                _ => false,
+            })
+            .collect::<Vec<_>>()
+    }
+}
+
 #[derive(Clone, Debug, PartialEq)]
 pub struct Ticket {
     pub title: TicketTitle,