Mr. Rust

Published my first CLI tool in Rust: smart_tasker Command-line task tracker using - clap - serde Supports: add, list, complete, delete Published: crates.io/crates/smart_t… Please check !!

@rustaceans_rs If only there were enough rust engineers

If it can be written in Rust then it will be written in Rust 🦀

🚀Question 205: What does this print?🦀 fn main() { let arr = [10, 20, 30]; let mut iter = arr.iter().rev(); println!("{:?}", iter.next()); println!("{:?}", iter.next()); }

@elonmusk Not even a bit

Is the algorithm starting to feel better?

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

🚀 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); }

Q: 202🦀 fn main() { let v = vec![1, 2, 3]; let mut iter = v.into_iter(); println!("{:?}", iter.next()); println!("{:?}", iter.next()); println!("{:?}", iter.next()); println!("{:?}", iter.next()); }

@pkraszewski @Oracle 😅😂

"In September 2025, @Oracle will begin adding Multi-Factor Authentication (MFA) to all Oracle logins." Yay! 48 year old baby finally learned to use potty!

🚀 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); }

Rust macros are black magic wrapped in curly braces.

🚀 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); } } ```

Web3 in JavaScript: “ship fast, break things.” Web3 in Rust: “ship once, pray never.”

🚀 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); } ```

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

🚀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); }

Rust doesn’t have garbage collection. It has you, collecting your own garbage at compile time.

🚀Question 197: What happens here?🦀 fn main() { let mut v = vec! [1, 2, 3 ] ; let a = &v[0] ; v.push(4) ; println!("{}", a) ; }

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

🚀Question 195: What happens?🦀 fn main() { let v = vec![1, 2, 3]; for i in v { println!("{}", i); } println!("{}", v[0]); }

🚀Question 194: What is the output?🦀 fn main() { let x = 5; let y = &x; println!("{}", *y + 1); }

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