X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/4f61be32dd480f23a7fef05ee66c42ae27c980c6..c2e9145b487a8bd3d31c5a6f318c86aaf3f9d17d:/workspace/src/part01.rs diff --git a/workspace/src/part01.rs b/workspace/src/part01.rs index 0578c43..be2c2d2 100644 --- a/workspace/src/part01.rs +++ b/workspace/src/part01.rs @@ -1,5 +1,3 @@ -// ***Remember to enable/add this part in `main.rs`!*** - // Rust-101, Part 01: Expressions, Inherent methods // ================================================ @@ -10,7 +8,7 @@ // ## Expression-based programming fn sqr(i: i32) -> i32 { i * i } -// Conditionals are also just expressions. You can compare this to the ternary `? :` operator +// Conditionals are also just expressions. This is comparable to the ternary `? :` operator // from languages like C. fn abs(i: i32) -> i32 { if i >= 0 { i } else { -i } } @@ -26,6 +24,12 @@ fn number_or_default(n: NumberOrNothing, default: i32) -> i32 { } } +// It is even the case that blocks are expressions, evaluating to the last expression they contain. +fn compute_stuff(x: i32) -> i32 { + let y = { let z = x*x; z + 14 }; + y*y +} + // Let us now refactor `vec_min`. fn vec_min(v: Vec) -> NumberOrNothing { fn min_i32(a: i32, b: i32) -> i32 { @@ -64,7 +68,7 @@ pub fn main() { // You will have to replace `part00` by `part01` in the `main` function in // `main.rs` to run this code. -// **Exercise 01.1**: Write a funtion `vec_sum` that computes the sum of all values of a `Vec`. +// **Exercise 01.1**: Write a function `vec_sum` that computes the sum of all values of a `Vec`. // **Exercise 01.2**: Write a function `vec_print` that takes a vector and prints all its elements.