initial commit

exercises/03_ticket_v1/09_heap/Cargo.toml

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+[package]
+name = "heap"
+version = "0.1.0"
+edition = "2021"

exercises/03_ticket_v1/09_heap/src/lib.rs

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+pub struct Ticket {
+    title: String,
+    description: String,
+    status: String,
+}
+
+// TODO: based on what you learned in this section, replace `todo!()` with
+//  the correct **stack size** for the respective type.
+#[cfg(test)]
+mod tests {
+    use super::Ticket;
+    use std::mem::size_of;
+
+    #[test]
+    fn string_size() {
+        assert_eq!(size_of::<String>(), todo!());
+    }
+
+    #[test]
+    fn ticket_size() {
+        // This is a tricky question!
+        // The "intuitive" answer happens to be the correct answer this time,
+        // but, in general, the memory layout of structs is a more complex topic.
+        // If you're curious, check out the "Type layout" section of The Rust Reference
+        // https://doc.rust-lang.org/reference/type-layout.html for more information.
+        assert_eq!(size_of::<Ticket>(), todo!());
+    }
+}