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Mr. Rust @code_rusty

Rust + Solana Dev in training Building daily. DM to connect. github.com/webrowse Blockchain Joined September 2024
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Mr. Rust @code_rusty

2 days ago

🚀 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); }

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Mr. Rust @code_rusty

2 days ago

Rust macros are black magic wrapped in curly braces.

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Mr. Rust @code_rusty

3 days ago

🚀 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); } } ```

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Mr. Rust @code_rusty

4 days ago

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

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Mr. Rust @code_rusty

4 days ago

🚀 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); } ```

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Mr. Rust @code_rusty

4 days ago

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

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Mr. Rust @code_rusty

a week ago

🚀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); }

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Mr. Rust @code_rusty

a week ago

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

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Mr. Rust @code_rusty

a week ago

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

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Mr. Rust @code_rusty

2 weeks ago

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

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Mr. Rust @code_rusty

2 weeks ago

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

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Mr. Rust @code_rusty

2 weeks ago

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

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Mr. Rust @code_rusty

2 weeks ago

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

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 192: In serde_json, what does serde_json::to_string(&value)? return?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 191: In tokio, what does .await on a future do?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 190: In the serde crate, what does #[serde(skip)] do?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 189: What does Box::new do in Rust?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 188: What does #[derive(Debug)] do?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 187: When using HashMap, what trait must the key type implement?🦀

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Mr. Rust @code_rusty

3 weeks ago

🚀Question 186: What does Pin<Box<T>> guarantee?🦀

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