Rust cheatsheet

rust_cheat_sheet.rs

// represents the `possible` absence of a value
enum Option<T> {
  Some(T),
  None,
}
  
let email: Option<String> = Some(email_str);
let email: Option<String> = None;

// represents an operation that could have failed
enum Result<O, E> {
  Ok(O),
  Err(E),
}
  
let success: Result<i64, String> = Ok(42);
let failure: Result<i64, String> = Err(str);