Chapter 17.1 - page_title example function referred to as page_url_for

[devindumke]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:

  • page_url_for

• I have checked the latest main branch to see if this has already been fixed, in this file:

  • https://github.com/cognitive-engineering-lab/rust-book/blob/main/src/ch17-01-futures-and-syntax.md

URL to the section(s) of the book with this problem:
https://rust-book.cs.brown.edu/ch17-01-futures-and-syntax.html

Description of the problem:
In Chapter 17.1 Futures and the Async Syntax, we create a function to demonstrate the async syntax:

use trpl::Html;

async fn page_title(url: &str) -> Option<String> {
    let response = trpl::get(url).await;
    let response_text = response.text().await;
    Html::parse(&response_text)
        .select_first("title")
        .map(|title_element| title_element.inner_html())
}

Later on in the page, we refer back to this function with the suggestion to modify it.

As a result, we can change the body of page_url_for to chain the trpl::get and text function calls together with await between them, as shown in Listing 17-2:

The above sentence implies that the function we should modify is page_url_for, but the function is called page_title. The term page_url_for does not show up anywhere in Chapter 17.

Suggested fix:
Change the sentence listed above in Chapter 17.1 to refer to the function as page_title.