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Instead of placing the link to the recommended resource i.e. the second edition in second place, push it up to the top of the list. In fact, push the link to the first edition always at the bottom. To emphasise even more that's where new visitors should go, bolden the first link, and make the first-ed link smaller. All this as well as a slight edit and simplification of the copy is designed to make the new and recommended resources the primary path readers take, without hiding the old resource completely.
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There is a new edition of the book and this is an old link.
A
Stringis allocated on the heap and as such is able to store an amount of text that is unknown to us at compile time. You can create aStringfrom a string literal using thefromfunction. A string slice is a reference to part of aString.
let s = String::from("hello world");
let hello = &s[0..5];
let world = &s[6..11];
Here are the relevant sections in the new and old books: