X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/39b387735112972cad7bb3175393a0a09d767335..77f9c2a913324c4cca010fb5a5e1fa12173e8374:/src/part10.rs?ds=inline diff --git a/src/part10.rs b/src/part10.rs index cfa10e4..6969889 100644 --- a/src/part10.rs +++ b/src/part10.rs @@ -36,7 +36,7 @@ struct PrintWithString { } impl Action for PrintWithString { - // Here we perform performs the actual printing of the prefix and the digit. We're not making use of our ability to + // Here we perform the actual printing of the prefix and the digit. We're not making use of our ability to // change `self` here, but we could replace the prefix if we wanted. fn do_action(&mut self, digit: u64) { println!("{}{}", self.prefix, digit); /*@*/ @@ -131,14 +131,14 @@ fn print_enumerated(v: &Vec) { // And as a final example, one can also collect all elements of an iterator, and put them, e.g., in a vector. fn filter_vec_by_divisor(v: &Vec, divisor: i32) -> Vec { //@ Here, the return type of `collect` is inferred based on the return type of our function. In general, it can return anything implementing - //@ [`FromIterator`](http://doc.rust-lang.org/stable/std/iter/trait.FromIterator.html). Notice that `iter` gives us an iterator over + //@ [`FromIterator`](https://doc.rust-lang.org/stable/std/iter/trait.FromIterator.html). Notice that `iter` gives us an iterator over //@ borrowed `i32`, but we want to own them for the result, so we insert a `map` to dereference. v.iter().map(|n| *n).filter(|n| *n % divisor == 0).collect() /*@*/ } -// **Exercise 10.1**: Look up the [documentation of `Iterator`](http://doc.rust-lang.org/stable/std/iter/trait.Iterator.html) to learn about more functions +// **Exercise 10.1**: Look up the [documentation of `Iterator`](https://doc.rust-lang.org/stable/std/iter/trait.Iterator.html) to learn about more functions // that can act on iterators. Try using some of them. What about a function that sums the even numbers of an iterator? Or a function that computes the // product of those numbers that sit at odd positions? A function that checks whether a vector contains a certain number? Whether all numbers are // smaller than some threshold? Be creative! -//@ [index](main.html) | [previous](part09.html) | [next](main.html) +//@ [index](main.html) | [previous](part09.html) | [raw source](https://www.ralfj.de/git/rust-101.git/blob_plain/HEAD:/workspace/src/part10.rs) | [next](part11.html)