This document is designed to aid anyone considering whether to write an
emulator for an arcade game machine. It will attempt to answer frequently
asked questions, give a step by step tutorial, and provide the resources
necessary for a capable programmer to begin work on an emulator for an
arcade game.
本文從英文C–FAQ (2004 年7 月3 日修訂版) 翻譯而來。本文的中文版權為
朱群英和孫云所有。本文的內容可以自由用于個人目的，但是不可以未經許可出
版發行。英文版權為Steve Summit 所有，詳情見下面的英文版權說明。
The English version of this FAQ list is Copyright 1990-2004 by Steve Summit.
Content from the book 《C Programming FAQs: frequently Asked Questions》is
made available here by permission of the author and the publisher as a service to
the community. It is intended to complement the use of the published text and is
protected by international copyright laws. The on-line content may be accessed
freely for personal use but may not be republished without permission.
Many of the pattern fi nding algorithms such as decision tree, classifi cation rules and clustering
techniques that are frequently used in data mining have been developed in machine learning
research community. Frequent pattern and association rule mining is one of the few excep-
tions to this tradition. The introduction of this technique boosted data mining research and its
impact is tremendous. The algorithm is quite simple and easy to implement. Experimenting
with Apriori-like algorithm is the fi rst thing that data miners try to do.
This document provides guidelines and describes how to easily port S60 2nd Edition
C++ applications to S60 3rd Edition. The document has been written based on
experiences of porting regular S60 2nd Edition applications, such as the S60 Platform:
POP/IMAP Example [4] that can be downloaded from Forum Nokia. Code snippets from
the example are shown in Chapter 8, “Application build changes,” and in Appendix A,
“Code example." In addition, Appendix B, "Commonly used functions that require
capabilities," and Appendix C, "Commonly used interfaces that have been changed or
removed," provide useful information on some frequently used functions and interfaces
in third-party applications.
Huffman codes
In telecommunication, how do we represent a
set of messages, each with an access
frequency, by a sequence of 0’s and 1’s?
To minimize the transmission and decoding
costs, we may use short strings to represent
more frequently used messages.
This problem can by solved by using an
extended binary tree which is used in the 2-
way merging problem.
Huffman codes
1.In telecommunication, how do we represent a set of messages, each with an access frequency, by a sequence of 0 s and 1 s?
2.To minimize the transmission and decoding costs, we may use short strings to represent more frequently used messages.
3.This problem can be solved by using an extended binary tree which is used in the 2-way merging problem.
the sourse code is
to encode and decode the Huffman.
Compression using lempel-ziv
-for a dictionary size of 2k
-provide dictionary
Lempel ziv algorithm is a dictionary based algorithm that addresses byte sequences from former contents instead of the original data. This algorithm consists of a rule for parsing strings of symbols from a finite alphabet into substrings, whose lengths do not exceed a prescribed integer and a coding scheme which maps these substrings sequentially into uniquely decipherable code words of fixed length. The strings are selected so that they have nearly equal probability of occurrence. frequently-occurring symbols are grouped into longer strings while occasional symbols appear in short strings.
SOME BACKGROUND ON DESIGN PATTERNS
The term “design patterns” sounds a bit formal to the uninitiated and
can be somewhat off-putting when you first encounter it. But, in fact, design
patterns are just convenient ways of reusing object-oriented code between
projects and between programmers. The idea behind design patterns is
simple-- write down and catalog common interactions between objects that
programmers have frequently found useful.
Someone who wants to get to know the customs of a country frequently
receives the advice to learn the language of that country. Why? Because the dif-
ferences that distinguish the people of one country from those of another are
reflected in the language. For example, the people of the islands of the Pacific
do not have a term for war in their language. Similarly, some native tribes in
the rain forests of the Amazon use up to 100 different terms for the color green.
