From be78f87e94270c415a363b07c9d04da3bc683662 Mon Sep 17 00:00:00 2001 From: Julio Biason Date: Thu, 27 Jun 2019 13:06:49 -0300 Subject: [PATCH] Tried to create a faster/quicker presentation for Rust --- quick-rust.html | 713 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 713 insertions(+) create mode 100644 quick-rust.html diff --git a/quick-rust.html b/quick-rust.html new file mode 100644 index 0000000..b0348a4 --- /dev/null +++ b/quick-rust.html @@ -0,0 +1,713 @@ + + + + + + Rápida Introdução ao Rust + + + + + + + + + + + + + + + + + + + + + + + + +
+
+
+
+

Rápida Introdução ao Rust

+
+
+ +
+
+ Me + +
+ +
+
+
+ +
+
+

História

+ +
    +
  • Criada em 2006 por Graydon Hoare.
    • +
  • Patrocinada pela Mozilla em 2009.
    • +
  • Versão 1.0 em 2015.
    • +
  • Versão atual: 1.35
    • +
  • Objetivo: Criar uma linguagem rápida mas com seguraça de memória.
    • +
+
+ + +
+ +
+
+

+ História + +

+ +

+ Basic + (com números e estruturado) + , dBase III Plus + , Clipper + , Pascal + , Cobol + , Delphi (ObjectPascal) + , C + , C++ + , ActionScript (Flash) + , PHP + , JavaScript + , Python + , Objective-C + , Clojure + , Java + , Scala + , Rust. +

+ + +
+ +
+ + + +
+ +
+
+ A language that doesn't affect the way you think + about programming, is not worth knowing. +
+ +
+ -- Alan Perlis, "ALGOL" +
+ + +
+
+ +
+
+

Meu Primeiro Rust

+ + 

+fn main() {
+    println!("Hello, world!");
+}
+
+ + +
+ +
+

Meu Primeiro Rust

+ +

Tempo para gerar esse código:

+ +

0 segundos

+
+ +
+

Meu Primeiro Rust

+ + cargo init + + +
+
+ +
+
+

+ + Cargo + +

+ +

"Cargo is the Rust package manager"

+ +

+ "Cargo downloads your Rust package’s dependencies, + compiles your packages, makes distributable + packages, and uploads them to crates.io, the Rust + community’s package registry." +

+ + +
+
+ +
+
+

Mas De Volta Ao Rust

+ + 

+fn main() {
+    let a:u8 = 2;
+    println!("{}", a);
+}
+
+
+ + + +
+

Mas De Volta Ao Rust

+ + 

+fn main() {
+    let a = 2u8;
+    println!("{}", a);
+}
+
+
+ + + +
+

Mas De Volta Ao Rust

+ + 

+fn main() {
+    let a = 2;
+    println!("{}", a);
+}
+
+
+ + + +
+

Mas De Volta ao Rust

+ + 

+fn factorial(i: u64) -> u64 {
+    match i {
+        0 => 1,
+        n => n * factorial(n-1)
+    }
+}
+
+
+ + + +
+

Mas De Volta ao Rust

+ + 

+fn is_pred(i: u64) -> Bool {
+    if i % 2 == 0 {
+       True
+    } else {
+       False
+    }
+}
+
+ + +
+ +
+

Mas De Volta ao Rust

+ + 

+fn is_pred(i: u64) -> Bool {
+    i % 2 == 0
+}
+
+ + +
+ +
+

Mas De Volta ao Rust

+ + 

+enum IPAddr {
+    IPV4,
+    IPV6
+}
+
+ + +
+ +
+

Mas De Volta ao Rust

+ + 

+enum IPAddr {
+    IPV4(String),
+    IPV6(String)
+}
+
+
+ +
+

Mas De Volta ao Rust

+ + 

+let home = IpAddr::V4(String::from("127.0.0.1");
+
+match home {
+    V4(ipv4_address) => println!("IPv4 addr: {}", ipv4_address),
+    V6(ipv6_address) => println!("Ipv6 addr: {}", ipv6_address),
+}
+
+
+
+ +
+
+

E Aquela "Segurança de Memória"?

+
+ +
+

1. No Null Pointers

+ + 

+match may_not_exist(value: Option<String>) {
+    match value {
+        Some(the_string) => println!("I got a string! {}", the_string),
+        None => println!("I got nothing")
+    }
+}
+
+ + +
+ +
+

2. No Shared Memory

+ + 

+fn main() {
+   let a = String::from("A reference to a string in the code section copied to the stack");
+   let b = a;
+   println!("The string is: {}", a);
+}
+
+
+ +
+ + + +
+ +
+

2. No Shared Memory

+ + 

+fn main() {
+   let a = String::from("A reference to a string in the code section copied to the stack");
+   let b = &a;
+   println!("The string is: {}", a);
+}
+
+
+ +
+ +
+ +
+ 
presente := Presente { ... }
+canal <- presente
+ 
+ + +
+ +
+ 
presente := Presente { ... }
+canal <- presente
+presente.abrir()
+ + +
+ +
+

3. Immutable variables by default

+ + 

+fn main() {
+    let a = 3;
+    a = 5;
+}
+
+
+
+ +
+
+

Error Control

+
+ +
+ 

+enum Result<T, E> {
+    Ok(T),
+    Err(E),
+}
+
+
+ +
+ 

+match File::create("something.txt") {
+    Ok(fp) => fp.write_all(b"Hello world"),
+    Err(err) => println!("Failure! {}", err),
+}
+
+
+
+ +
+
+

Compilador Chato mas Amigável

+
+ +
+ 

+fn main() {
+    let a = 2;
+    a = 3;
+    println!("{}", a);
+}
+
+
+ +
+ 

+3 |     let a = 2;
+  |         -
+  |         |
+  |         first assignment to `a`
+  |         help: make this binding mutable: `mut a`
+4 |     a = 3;
+  |     ^^^^^ cannot assign twice to immutable variable
+
+ + +
+ +
+ 

+3 |     let a = 2;
+  |         -
+  |         |
+  |         first assignment to `a`
+  |         help: make this binding mutable: `mut a`
+4 |     a = 3;
+  |     ^^^^^ cannot assign twice to immutable variable
+
+ + +
+ +
+ 

+3 |     let a = 2;
+  |         -
+  |         |
+  |         first assignment to `a`
+  |         help: make this binding mutable: `mut a`
+4 |     a = 3;
+  |     ^^^^^ cannot assign twice to immutable variable
+
+ + +
+ +
+ + + +
+
+ +
+
+

+ + A linguagem mais amada segundo o StackOverflow + Survey 2019 + + +

... pelo 4⁰ ano seguido.

+ + +

+
+
+ +
+

E agora?

+ + +
+ +
+
+ +
+
+
+
+ + + + + + + +