A JavaScript developer learning Rust #2

I will be reading chapters in the book "The Rust Programming Language" and share what I have learned with you the day after. This is RAW learning and nothing is prepared, but hopefully it will be a good format that fights impostor syndrom and inspires you to maybe learn the language as well!

[benmuker]

there are closures in rust:
let b = 2;
let f = |a: i32| a + b; // this is a closure, a is a parameter (the parameter list is contained in those '|' symbols) and it captures b.
let c = f(5);
println!("a + b = {}", c); // c is 7
However there are a more advanced feature and i advice getting more familiar with owership and borrowing first.

[echobucket]

In javascript primitive such as Number, String, Boolean, etc go on the stack. Objects are "reference types" which means they go on the heap.