Started Rust in Action MEAP.

10 files changed, 300 insertions, 0 deletions

diff --git a/meap/meap-code/ch1/ch1-animals-specialization.rs b/meap/meap-code/ch1/ch1-animals-specialization.rs
new file mode 100644
index 0000000..49fc0eb
--- /dev/null
+++ b/meap/meap-code/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();

+}

diff --git a/meap/meap-code/ch1/ch1-animals-tuple-structs.rs b/meap/meap-code/ch1/ch1-animals-tuple-structs.rs
new file mode 100644
index 0000000..ed479ed
--- /dev/null
+++ b/meap/meap-code/ch1/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();

+}

diff --git a/meap/meap-code/ch1/ch1-animals.rs b/meap/meap-code/ch1/ch1-animals.rs
new file mode 100644
index 0000000..ed479ed
--- /dev/null
+++ b/meap/meap-code/ch1/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();

+}

diff --git a/meap/meap-code/ch1/ch1-escape-html.rs b/meap/meap-code/ch1/ch1-escape-html.rs
new file mode 100644
index 0000000..7b61232
--- /dev/null
+++ b/meap/meap-code/ch1/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);

+}

diff --git a/meap/meap-code/ch1/ch1-hashmap-hashset.rs b/meap/meap-code/ch1/ch1-hashmap-hashset.rs
new file mode 100644
index 0000000..1fa9229
--- /dev/null
+++ b/meap/meap-code/ch1/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);

+    }

+  }

+}

diff --git a/meap/meap-code/ch1/ch1-hello2.rs b/meap/meap-code/ch1/ch1-hello2.rs
new file mode 100644
index 0000000..c804513
--- /dev/null
+++ b/meap/meap-code/ch1/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();

+}
\ No newline at end of file
diff --git a/meap/meap-code/ch1/ch1-save-user-data.rs b/meap/meap-code/ch1/ch1-save-user-data.rs
new file mode 100644
index 0000000..48f8130
--- /dev/null
+++ b/meap/meap-code/ch1/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);

+    

+

+}
\ No newline at end of file
diff --git a/meap/meap-code/ch1/ch1-time-api/Cargo.toml b/meap/meap-code/ch1/ch1-time-api/Cargo.toml
new file mode 100644
index 0000000..da28bde
--- /dev/null
+++ b/meap/meap-code/ch1/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"]
\ No newline at end of file
diff --git a/meap/meap-code/ch1/ch1-time-api/src/main.rs b/meap/meap-code/ch1/ch1-time-api/src/main.rs
new file mode 100644
index 0000000..660c1cc
--- /dev/null
+++ b/meap/meap-code/ch1/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();

+}
\ No newline at end of file
diff --git a/meap/meap-code/ch1/ch1-word-counts.rs b/meap/meap-code/ch1/ch1-word-counts.rs
new file mode 100644
index 0000000..fc5c8ea
--- /dev/null
+++ b/meap/meap-code/ch1/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);

+}