Проблема: стандартные массивы для очереди могут привести к необходимости дорогостоящих операций сдвига элементов при удалении.
Решение: в книге Algorithms and Data Structures for OOP With C# автор предлагает реализовать очередь на основе связного списка, что позволяет эффективно добавлять элементы в конец и удалять с начала за O(1).
Пример кода:
public class Node<T> { public T Data; public Node<T> Next;
public Node(T data) { Data = data; Next = null; } }
public class QueueLinkedList<T> { private Node<T> front, rear;
public QueueLinkedList() { front = rear = null; }
public void Enqueue(T item) { var newNode = new Node<T>(item); if (rear == null) { front = rear = newNode; return; } rear.Next = newNode; rear = newNode; }
public T Dequeue() { if (front == null) throw new InvalidOperationException("Queue is empty.");
var data = front.Data; front = front.Next;
if (front == null) rear = null;
return data; } }
Преимущества: — Нет затрат на сдвиг элементов — Высокая производительность при операциях добавления и удаления — Универсальная реализация для любых типов данных
Проблема: стандартные массивы для очереди могут привести к необходимости дорогостоящих операций сдвига элементов при удалении.
Решение: в книге Algorithms and Data Structures for OOP With C# автор предлагает реализовать очередь на основе связного списка, что позволяет эффективно добавлять элементы в конец и удалять с начала за O(1).
Пример кода:
public class Node<T> { public T Data; public Node<T> Next;
public Node(T data) { Data = data; Next = null; } }
public class QueueLinkedList<T> { private Node<T> front, rear;
public QueueLinkedList() { front = rear = null; }
public void Enqueue(T item) { var newNode = new Node<T>(item); if (rear == null) { front = rear = newNode; return; } rear.Next = newNode; rear = newNode; }
public T Dequeue() { if (front == null) throw new InvalidOperationException("Queue is empty.");
var data = front.Data; front = front.Next;
if (front == null) rear = null;
return data; } }
Преимущества: — Нет затрат на сдвиг элементов — Высокая производительность при операциях добавления и удаления — Универсальная реализация для любых типов данных
Spiking bond yields driving sharp losses in tech stocks
A spike in interest rates since the start of the year has accelerated a rotation out of high-growth technology stocks and into value stocks poised to benefit from a reopening of the economy. The Nasdaq has fallen more than 10% over the past month as the Dow has soared to record highs, with a spike in the 10-year US Treasury yield acting as the main catalyst. It recently surged to a cycle high of more than 1.60% after starting the year below 1%. But according to Jim Paulsen, the Leuthold Group's chief investment strategist, rising interest rates do not represent a long-term threat to the stock market. Paulsen expects the 10-year yield to cross 2% by the end of the year.
A spike in interest rates and its impact on the stock market depends on the economic backdrop, according to Paulsen. Rising interest rates amid a strengthening economy "may prove no challenge at all for stocks," Paulsen said.
Telegram Be The Next Best SPAC
I have no inside knowledge of a potential stock listing of the popular anti-Whatsapp messaging app, Telegram. But I know this much, judging by most people I talk to, especially crypto investors, if Telegram ever went public, people would gobble it up. I know I would. I’m waiting for it. So is Sergei Sergienko, who claims he owns $800,000 of Telegram’s pre-initial coin offering (ICO) tokens. “If Telegram does a SPAC IPO, there would be demand for this issue. It would probably outstrip the interest we saw during the ICO. Why? Because as of right now Telegram looks like a liberal application that can accept anyone - right after WhatsApp and others have turn on the censorship,” he says.
