Mr. Rust

Rust + Solana Dev in training
Building daily. DM to connect.

[Mr. Rust @code_rusty]

Published my first CLI tool in Rust: smart_tasker

Command-line task tracker using
- clap
- serde

Supports:
add, list, complete, delete
Published: https://t.co/7hjMnGJIYZ

Please check !!

[Mr. Rust @code_rusty]

@rustaceans_rs If only there were enough rust engineers

[Mr. Rust @code_rusty]

🚀Question 205:
What does this print?🦀

fn main() {
let arr = [10, 20, 30];
let mut iter = arr.iter().rev();
println!("{:?}", https://t.co/YT1gR2dyna());
println!("{:?}", https://t.co/YT1gR2dyna());
}

[Mr. Rust @code_rusty]

@elonmusk Not even a bit

[Mr. Rust @code_rusty]

Q204🦀:
fn main() {
let s1 = String::from("abc");
let s2 = String::from("defg");
let t = {
let r1 = https://t.co/4IGwaIqNVU_str();
let r2 = https://t.co/Hkgr6hOouw_str();
if r1.len() > r2.len() { r1 } else { r2 }
};
println!("{}", t);
}

[Mr. Rust @code_rusty]

🚀 Question 203:
What is the output? 🦀

fn main() {
let s1 = String::from("hi");
let s2 = String::from("rust");
let r: &str;
{
r = if s1.len() > s2.len() { &s1 } else { &s2 };
}
println!("{}", r);
}

[Mr. Rust @code_rusty]

Q: 202🦀

fn main() {
let v = vec![1, 2, 3];
let mut iter = v.into_iter();
println!("{:?}", https://t.co/YT1gR2dyna());
println!("{:?}", https://t.co/YT1gR2dyna());
println!("{:?}", https://t.co/YT1gR2dyna());
println!("{:?}", https://t.co/YT1gR2dyna());
}

[Mr. Rust @code_rusty]

@pkraszewski @Oracle 😅😂

[Mr. Rust @code_rusty]

🚀 Question 201:
What does this program print? 🦀

fn main() {
let mut s = String::from("rust");
{
let r = &mut s;
r.push_str("ace");
}
println!("{}", s);
}

[Mr. Rust @code_rusty]

Rust macros are black magic wrapped in curly braces.

[Mr. Rust @code_rusty]

🚀 Question 200:
What will this print? 🦀
```rust
fn main() {
let v = vec![1, 2, 3];
let iter = v.iter();
drop(v);
for x in iter {
println!("{}", x);
}
}
```

[Mr. Rust @code_rusty]

Web3 in JavaScript:
“ship fast, break things.”

Web3 in Rust:
“ship once, pray never.”

[Mr. Rust @code_rusty]

🚀 Question 199:
In Rust, what happens when your landlord sells the house? Do you still get to be the tenant? 🦀

```rust
fn main() {
let s1 = String::from("hi");
let s2 = &s1;
let s3 = s1;
println!("{}", s2);
}
```

[Mr. Rust @code_rusty]

“Why Rust?” Because I like safety… and also pain.

[Mr. Rust @code_rusty]

🚀Question 198:
What is the output?🦀

fn main() {

let data = vec!["a", "bb", "ccc"];

let max = data.iter()
.max_by_key ( |s| s.len () )
.unwrap ();

println!("{}", max);

}

[Mr. Rust @code_rusty]

Rust doesn’t have garbage collection.

It has you, collecting your own garbage at compile time.

[Mr. Rust @code_rusty]

🚀Question 197:
What happens here?🦀

fn main() {

let mut v = vec! [1, 2, 3 ] ;

let a = &v[0] ;

v.push(4) ;

println!("{}", a) ;

}

[Mr. Rust @code_rusty]

🚀Question 196:
What will be printed?🦀
fn main() {
let mut n = 1;
let f = || { n += 2; };
f();
println!("{}", n);
}

[Mr. Rust @code_rusty]

🚀Question 195:
What happens?🦀

fn main() {
let v = vec![1, 2, 3];
for i in v {
println!("{}", i);
}
println!("{}", v[0]);
}

[Mr. Rust @code_rusty]

🚀Question 194:
What is the output?🦀

fn main() {
let x = 5;
let y = &x;
println!("{}", *y + 1);
}

[Mr. Rust @code_rusty]

🚀Question 193:
In tokio, what does tokio::spawn return?🦀