X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/63b086dfbd9a5e90700f595c2e6ef7ee10522559..f5a79e8aaa07e56cf2dd8fe8438d96624dd84fbc:/src/part01.rs?ds=sidebyside diff --git a/src/part01.rs b/src/part01.rs index 8b14050..dc97d8d 100644 --- a/src/part01.rs +++ b/src/part01.rs @@ -9,6 +9,7 @@ use std; // terms you write down are not just *statements* (executing code), but *expressions* // (returning a value). This applies even to the body of entire functions! +// ## Expression-based programming // For example, consider `sqr`: fn sqr(i: i32) -> i32 { i * i } // Between the curly braces, we are giving the *expression* that computes the return value. @@ -55,6 +56,7 @@ fn vec_min(v: Vec) -> NumberOrNothing { // Now that's already much shorter! Make sure you can go over the code above and actually understand // every step of what's going on. +// ## Inherent implementations // So much for `vec_min`. Let us now reconsider `print_number_or_nothing`. That function // really belongs pretty close to the type `NumberOrNothing`. In C++ or Java, you would // probably make it a method of the type. In Rust, we can achieve something very similar