June 2018
Beginner to intermediate
240 pages
3h 54m
Russian
Content preview from Алгоритмы и структуры данных. Извлечение информации на языке Java
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10
Хеширование
В этой главе приводится описание MyBetterMap, лучшей реали-
зации интерфейса Map (по сравнению с MyLinearMap), и рассма-
тривается хеширование, использование которого делает класс
MyBetterMap более эффективным.
Хеширование
Чтобы улучшить производительность MyLinearMap, мы напишем
новый класс под названием MyBetterMap, содержащий коллекцию
объектов MyLinearMap. Он распределяет ключи среди встроенных
карт, поэтому количество записей на каждой карте меньше, что
позволяет ускорить findEntry и методы, которые от него зависят.
Начало определения класса будет таким:
public class MyBetterMap<K, V> implements Map<K, V> {
protected List<MyLinearMap<K, V>> maps;
public MyBetterMap(int k) {
126
Глава 10. Хеширование
makeMaps(k);
}
protected void ...
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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.