火雨2014-CSDN博客

原创 python 原理学习笔记

python 的垃圾回收机制引用计数每个python对象都有一个核心的结构结构体PyObject， PyObject是每个对象必有的内容，其中ob_refcnt就是做为引用计数。当一个对象有新的引用时，它的ob_refcnt就会增加，当引用它的对象被删除，它的ob_refcnt就会减少。优点：简单实时性：一旦没有引用，内存就直接释放了。不用像其他机制等到特定时机。实时性还带来一个好处：处理回收内存的时间分摊到了平时。缺点：维护引用计数消耗资源循环引用分代回收分代回收是一种以空

2020-09-28 00:11:35 132

原创数据库学习笔记

索引索引可以理解为目录，把一些关键信息用一种数据结构存储起来，达到高效查询搜索的目的。 mongoDB 有哪些索引单键索引在一个键上创建的索引就是单键索引，单键索引是最常见的索引，如MongoDB默认创建的_id的索引就是单键索引复合索引在多个键上建立的索引就是复合索引多键索引如果在一个数组上面创建索引，MongoDB会自己决定，是否要把这个索引建成多键索引。地理空间索引 Mong...

2020-05-19 19:37:40 213

原创 AI 五子棋

What is Gomoku? Gomoku is an abstract strategy board game. Also called Gobang or Five in a Row, it is traditionally played with Go pieces (black and white stones) on a go board with 19x19 (15x15) inte...

2020-04-20 21:33:48 282

原创 Redis 知识点

Redis 知识点 1. Redis 包含哪些数据结构 String、Hash、List、Set、SortedSet 底层由简单动态字符串（SDS），链表，字典，跳跃表，整数集合，压缩列表，对象 /* * Redis 对象 */ typedef struct redisObject { // 类型 unsigned type:4; // 不使用(对齐...

2020-04-19 14:28:14 101

精通Objective-C设计模式(Pro.Objective-C.Design.Patterns.for.iOS).Carlo.Chung.文字版

精通Objective-C设计模式

2017-04-18

leetcode-solution

leetcode 大部分问题的答案以及讲解

2016-12-27

人工智能五子棋

人工智能五子棋，运用博弈树，启发式搜索，alpha-beta剪枝，基于swift3。

2016-12-27

操作系统：精髓与设计原理（中文第七版

2016-10-16

[首发][中文版][第五版]计算机系统结构：量化研究方法

2016-09-22

swift 扫雷

swift版扫雷

2016-06-23

swift小游戏

用swift编写的旗帜小游戏，随机出现旗帜，玩家选择国家。可供初学者参考

2016-02-20

programming-interviews-exposed

Programming Interviews Exposed 2nd Edition The pressure is on during the interview process but with the right preparation, you can walk away with your dream job. This classic book uncovers what interviews are really like at America's top software and computer companies and provides you with the tools to succeed in any situation. The authors take you step-by-step through new problems and complex brainteasers they were asked during recent technical interviews. 50 interview scenarios are presented along with in-depth analysis of the possible solutions. The problem-solving process is clearly illustrated so you'll be able to easily apply what you've learned during crunch time. You'll also find expert tips on what questions to ask, how to approach a problem, and how to recover if you become stuck. All of this will help you ace the interview and get the job you want. What you will learn from this book * Tips for effectively completing the job application * Ways to prepare for the entire programming interview process * How to find the kind of programming job that fits you best * Strategies for choosing a solution and what your approach says about you * How to improve your interviewing skills so that you can respond to any question or situation * Techniques for solving knowledge-based problems, logic puzzles, and programming problems Who this book is for This book is for programmers and developers applying for jobs in the software industry or in IT departments of major corporations. Wrox Beginning guides are crafted to make learning programming languages and technologies easier than you think, providing a structured, tutorial format that will guide you through all the techniques involved.

2016-01-27

Sanjoy Dasgupta, Christos Papadimitriou, Umesh Vazirani. Algorithms.

This text, extensively class-tested over a decade at UC Berkeley and UC San Diego, explains the fundamentals of algorithms in a story line that makes the material enjoyable and easy to digest. Emphasis is placed on understanding the crisp mathematical idea behind each algorithm, in a manner that is intuitive and rigorous without being unduly formal.