theory

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am very well versed in the theory and practice of relational database design. I know what works and what doesn't, what is performant and what is maintainable (almost - there's always place to tweak when you start having real data). It seems I can't find a substantial body of knowledge regarding distributed scalable databases such as Google's Bigtable (for writing apps for google app engine). What works, what doesn't, what will scale, why won't? Sure, there are some blog posts and articles, but are there books or academic research papers on

Been working with MongoDB for a while and today I had a doubt while discussing with a colleague. The thing is that when you create an index in MongoDB, the collection is processed and the index is built. The index is updated within insertion and deletion of documents so I don't really see the need to run a rebuild index operation (which drops the index and then rebuild it). According to MongoDB documentation: Normally, MongoDB compacts indexes during routine updates. For most users, the reIndex command is unnecessary. However, it may be worth running if the collection size has changed

I was trying to understand the Wikipedia article on homoiconity , but it's too verbose and does not explain the main theory behind the word concisely. I should add that I'm not a native English speaker so I prefer simple English over academic white paper quotes. So, what exactly does it mean if a language is homoiconic? What makes C#, Java or JavaScript non-homoiconic? It means "code as data" which is a general characteristic of Lisp family. (add 2 3) Just like above string, which is both a list and also a function call. The "Homo" prefix stands for this characteristic. Scheme is homo-iconic

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've been searching on google, but cannot find anything basic. In it's most basic form, how is dual contouring (for a voxel terrain) implememted? I know what it does, and why, but cannot understand how to do it. JS or C# (preferably) is good.Has anyone used Dual contouring before and can explain it briefly? 回答1: Ok. So I got bored tonight and decided to give implementing dual contouring myself a shot. Like I said in the comments, all the relevant material is in section 2 of the following paper: http://www.frankpetterson.com/publications

Time for a theoretical question I just ran across. The following code is valid and compiles: public class Parent { public virtual object TestProperty { get; set; } } public class Child : Parent { private string _testValue = "Hello World!"; public override object TestProperty { get { return _testValue; } } } public class Consumer { Parent p = new Child(); public Consumer(){ p.TestProperty = 3; } } My question is: Why does C# allow me to partially override the TestProperty auto property in a child when it leads to partially unpredictable behavior? Is there a practical application? I'm allowed to

What is the use of finite automata ? And all the concepts that we study in the theory of computation. I've never seen their uses yet. They are the theoretical underpinnings of concepts widely used in computer science and programming, and understanding them helps you better understand how to use them (and what their limits are). The three basic ones you should encounter are, in increasing order of power: Finite automata, which are equivalent to regular expressions. Regular expressions are widely used in programming for matching strings and extracting text. They are a simple method of describing