November 2013
Beginner to intermediate
236 pages
4h 6m
English
Content preview from A Concise Introduction to Data Structures using JavaBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 11
Hash Tables
Hash tables focus on providing a fast search for any item. They achieve better search performance than even binary search trees by giving up one of the defining features of both binary search trees and heaps: that elements are stored according to their order.
11.1 Map Interface and Linked Implementation
The goal of a hash table is to provide close to O(1) search and insertion for any element. This emphasis on searching leads to a new interface, one based on looking up the value of a key.
Maps
A map is a set of key-value pairs in which each key is associated with one value. The same value may be paired with more than one key, but the point is that looking up a key returns the unique value that was stored for that key. Maps ...
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