BabylonCandle

TL;DR: Turn off the Pi-Hole or use Mobile data to redeem Fortnite gift cards.

Traits define a group of functions that work towards some shared behaviour.

Note: Do not use these functions if you have better/nicer alternatives. unwrap What if we want to fail (panic) our program if the supplied age is not twenty five?

We can unwrap a Result in a nicer way, if we provide a default value of type T or call a function that returns a value of type T when given a type E: // pseudocode // Given: Result<T, E> Ok(T) -> T Err(_) -> T // Return value of `T` Err(E) -> T // Use a…

When using functions like map_or_else, we extracted the success and error values out of a Result, thereby losing our Result wrapper.

Result gets interesting when you need to combine multiples to give you one final Result. and_then Sometimes when you have multiple functions that return Results, you want to know if all of them succeeded or any of them failed. and_then can help you there.…

What if we only wanted to parse two numbers and add them together and not return any errors?

Lets try to perform a calculation on multiple numbers parsed from strings: let numbers_1: Result<u32, ParseIntError> = add_numbers("10", "20", "30"); // Ok(60) let numbers_2 = add_numbers("ten", "20", "30"); // Err(ParseIntError { kind: InvalidDigit })…

There are even more ways to combine Resultss!

Trying to learning how to use the Rust Result type can be daunting.