Rust Result Vs Panic. Maps a Result to Result by applying a function to a contained Ok value leaving an Err value untouched. This function can be used to compose the results of two functions.
The other answers made good points already but to understand why things are how they are you need to know that its one of the core philosophies of Rust to catch as many errors at compile time as possible and make code that results in things like your program crashing explicit and verbose. Using and_then and map combinators on the Rust Result Type. Unwrap expect unwrap_err and expect_err for Result types.
When called on a Result unwrap will return the value if there is one ie.
Read more of my blog or subscribe to my feed. Print the numbers on each line of a string multiplied by two. Whats on this Page. Using and_then and map combinators on the Rust Result Type.