October 2024
Beginner to intermediate
344 pages
7h 44m
Korean
Content preview from 이펙티브 러스트
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185
3
장
주요 개념
struct Branch {
id: BranchId,
leaves: Vec<Rc<RefCell<Leaf>>>,
owner: Option<Weak<RefCell<Tree>>>,
}
struct Leaf {
id: LeafId,
owner: Option<Weak<RefCell<Branch>>>,
}
Weak
레퍼런스는 메인 레퍼런스 카운트를 증가시키지 않으므로 대상 항목이 사라졌는지 확인
하는 작업을 직접 수행해야 한다.
impl Branch {
fn add_leaf(branch: Rc<RefCell<Branch>>, mut leaf: Leaf) {
leaf.owner = Some(Rc::downgrade(&branch));
branch.borrow_mut().leaves.push(Rc::new(RefCell::new(leaf)));
}
fn location(&self) -> String {
match &self.owner {
None => format!("<unowned>.{}", self.id.0),
Some(owner) => {
// 약한 소유자 포인터(weak owner pointer)를 업그레이드한다.
let tree = owner.upgrade().expect("owner gone!");
format!("{}.{}", ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.