Not every Rustacean has a background in systems programming, nor in computer science, so we've added explanations of terms that might be unfamiliar.


Arity refers to the number of arguments a function or operation takes.

let x = (2, 3);
let y = (4, 6);
let z = (8, 2, 6);

In the example above x and y have arity 2. z has arity 3.