Updated naming again

1.HelloWorld/2.FormattedPrint/1Debugging.rs

@@ -0,0 +1,38 @@
+// Derive the `fmt::Debug` implementation for `Structure`. `Structure`
+// is a structure which contains a single `i32`.
+#[derive(Debug)]
+struct Structure(i32);
+
+// Put a `Structure` inside of the structure `Deep`. Make it printable
+// also.
+#[derive(Debug)]
+struct Deep(Structure);
+
+#[derive(Debug)]
+struct Person<'a>{
+	name: &'a str,
+	age: u8
+}
+
+fn main(){
+	//Printing with `{:?}` is similar to with `{}`.
+	println!("{:?} months in a year.", 12);
+	println!("{1:?} {0:?} is the {actor:?} name.",
+			 "Slater",
+			 "Christian",
+			 actor="actor's");
+
+	//`Structure` is printable!
+	println!("Now {:?} will print!", Structure(3));
+	
+	//The problem with `derive` is there is no control over how
+	//the results look. What if I want this to just show a `7`?
+	println!("Now {:?} will print!", Deep(Structure(7)));
+	
+	let name = "Peter";
+	let age = 27;
+	let peter = Person { name, age };
+
+	//Pretty print
+	println!("{:#?}", peter);
+}

1.HelloWorld/2.FormattedPrint/2-1-Testcase-List.rs

@@ -0,0 +1,33 @@
+//Import the `fmt` module.
+use std::fmt;
+
+//Define a structure named `List` containing a `Vec`.
+struct List(Vec<i32>);
+
+impl fmt::Display for List{
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result{
+		//Extract the value using tuple indexing,
+		//and create a reference to `vec`.
+		let vec = &self.0;
+
+		write!(f, "[")?;
+
+		//Iterate over `v` in `vec` while enumerating the iteration count in `count`.
+		for(count, v) in vec.iter().enumerate(){
+			//For every element except the first, add a comma.
+			//Use the ? operator, or try!, to return on errors.
+			if count != 0{
+				write!(f, ", ")?;
+			}
+			write!(f, "{}: {}", count, v)?;
+		}
+
+		//Close the opened bracket and return a fmt::Result value.
+		write!(f, "]")
+	}
+}
+
+fn main(){
+	let v = List(vec![1, 2, 3]);
+	println!("{}", v);
+}

1.HelloWorld/2.FormattedPrint/2Display.rs

@@ -0,0 +1,71 @@
+use std::fmt;	//Import `fmt`
+
+//A structure holding two numbers. `Debug` will be derived so the results can
+//be contrasted with `Display`.
+#[derive(Debug)]
+struct MinMax(i64, i64);
+//Implement `Display` for `MinMax`.
+impl fmt::Display for MinMax{
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result{
+		//Use `self.number` to refer to each positional data point.
+		write!(f, "({}, {})", self.0, self.1)
+	}
+}
+
+//Define a structure where the fields are nameable for comparison.
+#[derive(Debug)]
+struct Point2D{
+	x: f64,
+	y: f64,
+}
+//Similarly, implement `Display` for `Point2D`
+impl fmt::Display for Point2D{
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result{
+		//Customize so only `x` and `y` are denoted.
+		write!(f, "x: {}, y: {}", self.x, self.y)
+	}
+}
+
+//Define a structure for complex numbers
+#[derive(Debug)]
+struct Complex{
+	real: f64,
+	imag: f64,
+}
+//Implement 'Display' for Complex
+impl fmt::Display for Complex{
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result{
+		write!(f, "{} + {}i", self.real, self.imag)
+	}
+}
+
+fn main(){
+	let minmax = MinMax(0, 14);
+
+	println!("Compare structures:");
+	println!("Display: {}", minmax);
+	println!("Debug: {:?}", minmax);
+
+	let big_range =   MinMax(-300, 300);
+	let small_range = MinMax(-3, 3);
+
+	println!("The big range is {big} and the small is {small}",
+			 small = small_range,
+			 big = big_range);
+
+	let point = Point2D { x: 3.3, y: 7.2 };
+
+	println!("Compare points:");
+	println!("Display: {}", point);
+	println!("Debug: {:?}", point);
+
+	//Error. Both `Debug` and `Display` were implemented, but `{:b}`
+	//requires `fmt::Binary` to be implemented. This will not work.
+	//println!("What does Point2D look like in binary: {:b}?", point);
+
+	//Print a test for Complex
+	let comp = Complex{real: 3.3, imag: 7.2};
+	println!("Compare Complex:");
+	println!("Display: {}", comp);
+	println!("debug: {:?}", comp);
+}

1.HelloWorld/2.FormattedPrint/3Formatting.rs

@@ -0,0 +1,52 @@
+use std::fmt::{self, Formatter, Display};
+
+struct City{
+	name: &'static str,
+	//Latitude
+	lat: f32,
+	//Longitude
+	lon: f32,
+}
+impl Display for City{
+	//`f` is a buffer, and this method must write the formatted string into it
+	fn fmt(&self, f: &mut Formatter) -> fmt::Result{
+		let lat_c = if self.lat >= 0.0 { 'N' } else { 'S' };
+		let lon_c = if self.lon >= 0.0 { 'E' } else { 'W' };
+
+		//`write!` is like `format!`, but it will write the formatted string
+		//into a buffer (the first argument)
+		write!(f, "{}: {:.3}°{} {:.3}°{}", self.name, self.lat.abs(), lat_c, self.lon.abs(), lon_c)
+	}
+}
+
+#[derive(Debug)]
+struct Color{
+	red: u8,
+	green: u8,
+	blue: u8,
+}
+impl Display for Color{
+	fn fmt(&self, f: &mut Formatter) -> fmt::Result{
+		write!(f, "RGB ({0}, {1}, {2}) 0x{0:0width$X}{1:0width$X}{2:0width$X}", self.red, self.green, self.blue, width = 2)
+	}
+}
+
+fn main(){
+	for city in[
+		City{ name: "Dublin", lat: 53.347778, lon: -6.259722 },
+		City{ name: "Oslo", lat: 59.95, lon: 10.75 },
+		City{ name: "Vancouver", lat: 49.25, lon: -123.1 },
+	].iter(){
+		println!("{}", *city);
+	}
+	for color in[
+		Color { red: 128, green: 255, blue: 90 },
+		Color { red: 0, green: 3, blue: 254 },
+		Color { red: 0, green: 0, blue: 0 },
+	].iter(){
+		//Switch this to use {} once you've added an implementation
+		//for fmt::Display.
+		//println!("{:?}", *color);
+		println!("{}", *color);
+	}
+}