some more stuff

ch4/slices/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "slices"
+version = "0.1.0"

ch4/slices/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "slices"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

ch4/slices/src/main.rs

@@ -0,0 +1,18 @@
+fn first_word(s: &String) -> usize {
+    let bytes = s.as_bytes();
+
+    for (i, &item) in bytes.iter().enumerate() {
+        if item == b' ' {
+            return i;
+        }
+    }
+
+    s.len()
+}
+ 
+fn main() {
+    let mut s = String::from("hello world");
+    let word = first_word(&s);
+    println!("{}", word);
+    s.clear();
+}

ch5/rectangles/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "rectangles"
+version = "0.1.0"

ch5/rectangles/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rectangles"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

ch5/rectangles/src/main.rs

@@ -0,0 +1,37 @@
+#[derive(Debug)]
+struct Rect {
+    width: u32,
+    height: u32,
+}
+
+impl Rect {
+    fn area(&self) -> u32 {
+        self.width * self.height
+    }
+
+    fn can_hold(&self, other: &Rect) -> bool {
+        self.width >= other.width && self.height >= other.height
+    }
+}
+
+fn main() {
+    let rect1 = Rect {
+        width: 30,
+        height: 50,
+    };
+
+    let rect2 = Rect {
+        width: 29,
+        height: 50,
+    };
+
+    let rect3 = Rect {
+        width: 29,
+        height: 51,
+    };
+
+    // println!("The area is {rect1:#?}");
+    println!("{} * {} = {}", rect1.width, rect1.height, rect1.area());
+    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
+    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
+}

ch7/restaurant/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "restaurant"
+version = "0.1.0"

ch7/restaurant/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "restaurant"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

ch7/restaurant/src/front_of_house.rs

@@ -0,0 +1,2 @@
+pub mod hosting;
+mod serving;

ch7/restaurant/src/front_of_house/hosting.rs

@@ -0,0 +1,2 @@
+pub fn add_to_waitlist() {}
+fn seat_at_table() {}

ch7/restaurant/src/front_of_house/serving.rs

@@ -0,0 +1,3 @@
+fn take_order() {}
+fn serve_order() {}
+fn take_payment() {}

ch7/restaurant/src/lib.rs

@@ -0,0 +1,49 @@
+mod front_of_house;
+
+mod back_of_house {
+    // All fields are public or private along with the enum itself
+    pub enum Appetizer {
+        Soup,
+        Salad,
+    }
+
+    // Fields have to be marked pub as well to be used publicly
+    pub struct Breakfast {
+        pub toast: String,
+        seasonal_fruit: String,
+    }
+
+    impl Breakfast {
+        pub fn summer(toast: &str) -> Breakfast {
+            Breakfast {
+                toast: String::from(toast),
+                seasonal_fruit: String::from("peaches"),
+            }
+        }
+    }
+    
+    fn fix_incorrect_order() {
+        cook_order();
+        super::deliver_order(); // Child scope can access anything in parent
+    }
+
+    fn cook_order() {}
+}
+
+fn deliver_order() { }
+
+// Note how the front_of_house mod is still private.
+// eat_at_restaurant can access its public children because it is
+// defined at the same scope.
+pub fn eat_at_restaurant() {
+    // abs path
+    crate::front_of_house::hosting::add_to_waitlist();
+
+    // rel path
+    front_of_house::hosting::add_to_waitlist();
+
+    let mut meal = back_of_house::Breakfast::summer("Rye");
+    meal.toast = String::from("Wheat");
+    println!("id like {} toast please", meal.toast);
+    // meal.seasonal_fruit = String::from("blackberries");
+}