Method is_empty

src/models/lru_cache.rs:44–46

(&self, idx: usize)

    }

    fn is_empty(&self, idx: usize) -> bool {
        self.inner[idx].load(Ordering::SeqCst) == u64::MAX
    }

    fn clear(&self, idx: usize) {
        self.inner[idx].store(u64::MAX, Ordering::SeqCst)