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Julio Biason 6 years ago
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  1. 92
      porque-rust.html

92
porque-rust.html

@ -94,7 +94,7 @@
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
fn main() {
let a = 2;
a = 3;
@ -104,7 +104,7 @@ fn main() {
</section>
<section>
<pre><code>
<pre><code class="hljs" data-trim>
3 | let a = 2;
| -
| |
@ -116,7 +116,7 @@ fn main() {
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
fn main() {
let mut a = 2;
a = 3;
@ -132,25 +132,27 @@ fn main() {
</section>
<section>
<pre><code>
a = 2
<pre><code class="hljs rust" data-trim>
a = String::from("hello");
</code></pre>
</section>
<section>
"Variável <code>a</code> tem o valor 2"
"Variável <code>a</code> tem o valor <code>"hello"</code>"
</section>
<section>
<div>
"Posição de memória apontada por <code>a</code> tem o valor 2"
"Posição de memória apontada por <code>a</code> tem o valor <code>"hello"</code>"
</div>
<div class="fragment">
<pre><code>
0x3f5cbf89 = 2
0x3f5cbf89 = "hello"
</code></pre>
</div>
<img src="_images/rust-memory.png" alt="" class="fragment">
</section>
<section>
@ -165,7 +167,7 @@ a = 2
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
fn main() {
let a = String::from("hello");
let _b = a;
@ -189,13 +191,13 @@ error[E0382]: borrow of moved value: `a`
</section>
<section>
<h3>E se eu precisar acessar a variável em mais de um lugar?</h3>
<p>E se eu precisar acessar a variável em mais de um lugar?</p>
<p class="fragment">References</p>
<h3 class="fragment">References</h3>
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
fn main() {
let a = String::from("hello");
let _b = &a;
@ -204,6 +206,10 @@ fn main() {
</code></pre>
</section>
<section>
<img src="_images/rust-reference.png" alt="">
</section>
<section>
<h3>Regras do Borrow Checker</h3>
@ -225,11 +231,18 @@ fn main() {
</section>
<section>
<img src="_images/rust-memory.png" alt="">
<img src="_images/dunno.jpg" alt="">
</section>
<section>
<img src="_images/rust-reference.png" alt="">
<pre><code class="hljs go" data-trim>presente := Presente { ... }
canal &lt;- presente</code></pre>
</section>
<section>
<pre><code class="hljs go" data-trim>presente := Presente { ... }
canal &lt;- presente
presente.abrir()</code></pre>
</section>
<section>
@ -239,11 +252,14 @@ fn main() {
<section>
<section>
<h2>Enums</h2>
<h2>Tipos Algébricos</h2>
<p class="fragment">(structs)</p>
</section>
<section>
<pre><code>
<h3>enum</h3>
<pre><code class="hljs rust" data-trim>
enum IpAddr {
V4,
V6
@ -252,7 +268,7 @@ enum IpAddr {
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
enum IpAddr {
V4(String),
V6(String),
@ -261,18 +277,18 @@ enum IpAddr {
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
let home = IpAddr::V4(String::from("127.0.0.1");
match home {
V4(address) => println!("IPv4 addr: {}", address),
V6(address) => println!("Ipv6 addr: {}", address),
V4(address) =&gt; println!("IPv4 addr: {}", address),
V6(address) =&gt; println!("Ipv6 addr: {}", address),
}
</code></pre>
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
enum Option&lt;T&gt; {
Some(T),
None
@ -287,7 +303,7 @@ enum Option&lt;T&gt; {
</section>
<section>
<pre><code>
<pre><code class="hljs python" data-trim>
try:
something()
except Exception:
@ -296,7 +312,7 @@ except Exception:
</section>
<section>
<pre><code>
<pre><code class="hljs java" data-trim>
try {
something();
} catch (Exception ex) {
@ -306,7 +322,7 @@ try {
</section>
<section>
<pre><code>
<pre><code class="hljs c" data-trim>
FILE* f = fopen("someting.txt", "wb");
fprintf(f, "Done!");
fclose(f);
@ -320,7 +336,7 @@ fclose(f);
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
enum Result&lt;T, E&gt; {
Ok(T),
Err(E),
@ -329,36 +345,36 @@ enum Result&lt;T, E&gt; {
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
File::create("something.txt") match {
Ok(fp) => fp.write_all(b"Hello world"),
Err(err) => println!("Failure! {}", err),
Ok(fp) =&gt; fp.write_all(b"Hello world"),
Err(err) =&gt; println!("Failure! {}", err),
}
</code></pre>
</section>
<section>
<pre><code>
<pre><code class="hljs rust" data-trim>
File::create("something.txt") match {
Ok(fp) => fp.write_all(b"Hello world") match {
Ok(_) => (),
Err(err) => println!("Can't write! {}", err),
Ok(fp) =&gt; fp.write_all(b"Hello world") match {
Ok(_) =&gt; (),
Err(err) =&gt; println!("Can't write! {}", err),
}
Err(err) => println!("Failure! {}", err),
Err(err) =&gt; println!("Failure! {}", err),
}
</code></pre>
</section>
<section>
<pre><code>
let mut file = File::create("something.txt).unwrap();
<pre><code class="hljs rust" data-trim>
let mut file = File::create("something.txt").unwrap();
file.write(b"Hello world").unwrap();
</code></pre>
</section>
<section>
<pre><code>
let mut file = File::create("something.txt)?;
<pre><code class="hljs rust" data-trim>
let mut file = File::create("something.txt")?;
file.write(b"Hello world")?;
OK(())
</code></pre>
@ -379,7 +395,7 @@ OK(())
</section>
<section>
<img src="_images/rust-issues.png" alt="4.5k issues no Github">
<img src="_images/rust-issues.png" alt="4.5k issues no Github" class="stretch">
</section>
<section>

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