Rust Result Generic Error. You seem to be confused as to what generic type parameters mean. The point of this is that the caller of your function can choose T to be whatever they please at all.
As long as T satisfies the trait bounds. We can omit these and just write _ since Rust can infer them from the contents of the Iterator but if youre curious the specific type is HashMap. After working through the books main content I got started with my first non-trivial real-world application.
Thread main panicked at NOT_AN_EVEN mainrs9 note.
T and E are generic type parameters. IoResult is short for Result. Unrecoverable errors are always symptoms of bugs like trying to access a location beyond the end of an array. Rust groups errors into two major categories.