Add all source code files

Author: Tim McNamara

celsius-0-debug.rs

@@ -0,0 +1,6 @@
+struct Celsius(f32);
+
+fn main() {
+  let nice_and_warm = Celsius(22.3);
+  println!("It's {:?}℃ today.", nice_and_warm);
+}

celsius-0.rs

@@ -0,0 +1,6 @@
+struct Celsius(f32);
+
+fn main() {
+  let nice_and_warm = Celsius(22.3);
+  println!("It's {}℃ today.", nice_and_warm);
+}

ch1-animals-specialization.rs

@@ -0,0 +1,47 @@
+struct Animal {
+	age: i32,
+}
+
+type Cat = Animal;
+type Dog = Animal;
+type LoudDog = Dog;
+
+trait Talk {
+	fn talk(&self) -> ();
+}
+
+impl Talk for Animal {
+	default fn talk(&self) { // note the use of the default 
+		println!("<silence>");
+	}
+}
+
+impl Talk for Cat {
+	fn talk(&self) {
+		println!("Meow");
+	}
+}
+
+impl Talk for Dog {
+	fn talk(&self) {
+		println!("Woof!");
+	}
+}
+
+impl Talk for LoudDog {
+	fn talk(&self) {
+		println!("WOOF!!");
+	}
+}
+
+
+
+fn main() {
+	let fluffy = Cat(Animal { age: 4 });
+	let max = Dog(Animal { age: 2 });
+	let neighbours_dog = LoudDog(Animal { age: 7 });
+
+	fluffy.talk();
+	max.talk();
+	neighbours_dog.talk();
+}

ch1-animals-tuple-structs.rs

@@ -0,0 +1,41 @@
+struct Animal {
+	age: i32,
+}
+
+struct Cat(Animal);
+struct Dog(Animal);
+struct LoudDog(Animal);
+
+trait Talk {
+	fn talk(&self) -> ();
+}
+
+impl Talk for Cat {
+	fn talk(&self) {
+		println!("Meow");
+	}
+}
+
+impl Talk for Dog {
+	fn talk(&self) {
+		println!("Woof!");
+	}
+}
+
+impl Talk for LoudDog {
+	fn talk(&self) {
+		println!("WOOF!!");
+	}
+}
+
+
+
+fn main() {
+	let fluffy = Cat(Animal { age: 4 });
+	let max = Dog(Animal { age: 2 });
+	let neighbours_dog = LoudDog(Animal { age: 7 });
+
+	fluffy.talk();
+	max.talk();
+	neighbours_dog.talk();
+}

ch1-animals.rs

@@ -0,0 +1,41 @@
+struct Animal {
+	age: i32,
+}
+
+struct Cat(Animal);
+struct Dog(Animal);
+struct LoudDog(Animal);
+
+trait Talk {
+	fn talk(&self) -> ();
+}
+
+impl Talk for Cat {
+	fn talk(&self) {
+		println!("Meow");
+	}
+}
+
+impl Talk for Dog {
+	fn talk(&self) {
+		println!("Woof!");
+	}
+}
+
+impl Talk for LoudDog {
+	fn talk(&self) {
+		println!("WOOF!!");
+	}
+}
+
+
+
+fn main() {
+	let fluffy = Cat(Animal { age: 4 });
+	let max = Dog(Animal { age: 2 });
+	let neighbours_dog = LoudDog(Animal { age: 7 });
+
+	fluffy.talk();
+	max.talk();
+	neighbours_dog.talk();
+}

ch1-escape-html.rs

@@ -0,0 +1,22 @@
+fn escape_html(maybe_html: &str) -> String {
+  let mut out = String::with_capacity(maybe_html.len());
+
+  for c in maybe_html.chars() {
+    match c {
+      '<' => out.push_str("&lt;"),
+      '>' => out.push_str("&gt;"),
+      '&' => out.push_str("&amp;"),
+      '\'' => out.push_str("&apos;"),
+      '"' => out.push_str("&quot;"),
+      _   => out.push(c),
+    };
+  }
+
+  out
+}
+
+fn main() {
+  let html = "<p>\"Hello, World!\"</p>";
+  let escaped_html = escape_html(html);
+  println!("{}", escaped_html);
+}

ch1-hashmap-hashset.rs

@@ -0,0 +1,33 @@
+use std::collections::{HashMap, HashSet};
+
+fn main() {
+
+  let input_text = "does this work
+  i dont know
+  how rust works";
+
+  let mut character_counts = HashMap::new();
+
+  let mut n_lines = 0u32;
+
+  for l in input_text.lines() {
+    n_lines = n_lines + 1;
+
+    let mut chars_for_line = HashSet::new();
+
+    for c in l.chars() {
+      if chars_for_line.contains(&c) {
+        continue
+      }
+      let c_count = character_counts.entry(c).or_insert(0u32);
+      *c_count += 1;
+      chars_for_line.insert(c);
+    }
+  }
+
+  for (c, c_count) in &character_counts {
+    if *c_count == n_lines {
+      println!("{}", c);
+    }
+  }
+}

ch1-hello2.rs

@@ -0,0 +1,16 @@
+fn greet_world() {
+    println!("Hello, world!");  // our old friend.
+
+    let southern_germany = "Grüß Gott!";
+    let japan = "ハロー・ワールド"; 
+
+    let regions = [southern_germany, japan];
+
+    for region in regions.iter() {
+            println!("{}", &region);
+    }
+}
+
+fn main() {
+    greet_world();
+}

ch1-save-user-data.rs

@@ -0,0 +1,32 @@
+use std::str;
+
+#[derive(Debug)]
+struct User {
+    id: u8,
+    secret: String,
+}
+
+fn store_secrets(user: &User, buffer: &mut[u8]) {
+    let _secret = user.secret.clone();
+
+    
+    // assume we're writing to a database
+    println!("{:?}: {}", user, str::from_utf8(&buffer).unwrap());
+}
+
+fn main() {
+    let buffer = &mut[0u8; 1024];
+    let u1 = User {
+        id: 1,
+        secret: String::from("Pa55w0rd!"),
+    };
+    let u2 = User {
+        id: 2,
+        secret: String::from("correct horse battery staple"),
+    };
+
+    store_secrets(&u1, buffer);
+    store_secrets(&u2, buffer);
+    
+
+}

ch1-time-api/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "ch1-time-api"
+version = "0.1.0"
+authors = ["Tim McNamara <code@timmcnamara.co.nz>"]
+
+[dependencies]
+chrono = "0.4.0"
+rocket = "0.3.0"
+rocket_codegen = "0.3.0"
+serde = "1.0"
+serde_derive = "1.0"
+
+[dependencies.rocket_contrib]
+version = "0.3.0"
+default-features = false
+features = ["json"]

ch1-time-api/src/main.rs

@@ -0,0 +1,36 @@
+#![feature(plugin)] // <1>
+#![plugin(rocket_codegen)] // <1>
+
+extern crate serde;          // <2>
+extern crate chrono;         // <2>
+extern crate rocket;         // <2>
+extern crate rocket_contrib; // <2>
+
+#[macro_use]  // <3> Syntax to indicate that we want to import macros from another module
+extern crate serde_derive;   // <3>
+
+use chrono::prelude::*; // <4> brings all exported members into local scope (e.g. DateTime and Utc)
+use rocket_contrib::{Json}; // <5> bring single member into local scope
+
+#[derive(Serialize)] // <6> Automatically generate a string representation of this struct (which will be used as JSON)
+struct Timestamp { // <7> Syntax to create a custom type 
+    time: String,  // <8> The `Timestamp` `time` field is of type `String`
+}
+
+#[get("/")] // <9> Custom syntax provided by the library that indicates to  code generation
+fn index() -> &'static str { // <10> Define a function with no arguments and its return type
+    "Hello, world!" // <11> Rust returns the result of the final expression 
+}
+
+#[get("/time")]
+fn time_now() -> Json<Timestamp> {
+    let now: DateTime<Utc> = Utc::now();
+    let timestamp = Timestamp { time: now.to_rfc3339() };
+    Json(timestamp)
+}
+
+fn main() {
+    rocket::ignite()
+            .mount("/", routes![index, time_now])
+            .launch();
+}

ch1-word-counts.rs

@@ -0,0 +1,16 @@
+use std::collections::HashMap;
+
+fn main() {
+    let text = "once upon a time ...";
+    let mut word_counts = HashMap::new();
+    
+    let pairs = text.split(" ")
+                    .map(|x| { (x, 1) });
+    
+    for (word, count) in pairs {
+        let tmp = word_counts.entry(word)
+                             .or_insert(0);
+        *tmp += count;
+    }
+    println!("{:?}", word_counts);
+}

ch1/ch1-animals-specialization.rs

@@ -0,0 +1,47 @@
+struct Animal {
+	age: i32,
+}
+
+type Cat = Animal;
+type Dog = Animal;
+type LoudDog = Dog;
+
+trait Talk {
+	fn talk(&self) -> ();
+}
+
+impl Talk for Animal {
+	default fn talk(&self) { // note the use of the default 
+		println!("<silence>");
+	}
+}
+
+impl Talk for Cat {
+	fn talk(&self) {
+		println!("Meow");
+	}
+}
+
+impl Talk for Dog {
+	fn talk(&self) {
+		println!("Woof!");
+	}
+}
+
+impl Talk for LoudDog {
+	fn talk(&self) {
+		println!("WOOF!!");
+	}
+}
+
+
+
+fn main() {
+	let fluffy = Cat(Animal { age: 4 });
+	let max = Dog(Animal { age: 2 });
+	let neighbours_dog = LoudDog(Animal { age: 7 });
+
+	fluffy.talk();
+	max.talk();
+	neighbours_dog.talk();
+}