SEARCH KEYWORD -- Difference
Speed Hashing
A given hash uniquely represents a file, or any arbitrary collection of data. At least in theory. This is a 128-bit MD5 hash you're looking at above, so it can represent at most 2128 unique items, or 340 trillion trillion trillion. In reality the usable space is substantially less; you can start seeing significant collisions once you've filled half the space, but half of an impossibly large number is still impossibly large. Back in 2005, I wondered about the difference between a checksum and...
Speed hashing,Security,MD5 2012-04-07 10:35:15
Java Sequential IO Performance
Many applications record a series of events to file-based storage for later use. This can be anything from logging and auditing, through to keeping a transaction redo log in an event sourced design or its close relative CQRS. Java has a number of means by which a file can be sequentially written to, or read back again. This article explores some of these mechanisms to understand their performance characteristics. For the scope of this article I will be using pre-a...
Java,IO,Sequential,Blocking 2012-02-23 07:09:10
Simple but Interesting Features of VS2010 and C# 4.0
IntroductionVS 2010 and C# 4.0 introduced so many new features. Here in this article, I try to cover some very simple, yet very useful features of both.1. Hiding the Selected Part of CodeMany a times, a situation arises when we want to hide a specified piece of code rather that hiding the entire region. This has become easier in VS 2010. Just select the part of the code that you want to hide and right click selectOutlining -> Hide Selection.Same way like a region code also gets collapsible an...
VS2010,C#4.0,New feature,Walk through 2011-11-18 08:59:29
Understand GoLang WaitGroup internals and how it works
Background Before getting into the main content, let me give a brief introduction to WaitGroup and its related background knowledge. Here, the focus is on the basic usage of WaitGroup and the fundamental knowledge of system semaphores. For those who are familiar with these, you can skip this section directly. WaitGroup WaitGroup is one of the most common concurrency control techniques in Golang, and its function can be roughly compared to the join() in concurrency control of other languages' mul...
GOLANG,WAITGROUP,SOURCE CODE 2023-04-26 08:02:01
Python internals: adding a new statement to Python
This article is an attempt to better understand how the front-end of Python works. Just reading documentation and source code may be a bit boring, so I’m taking a hands-on approach here: I’m going to add an until statement to Python. All the coding for this article was done against the cutting-edge Py3k branch in the Python Mercurial repository mirror. The until statement Some languages, like Ruby, have an until statement, which is the complement to while (until num == 0 is equi...
Python,New statement,Research,Addition 2012-03-12 07:32:24
Mock Solutions for GoLang Unit Test
In Go development, Unit Test is inevitable. And it is essential to use Mock when writing Unit Tests. Mock can help test isolate the business logic it depends on, enabling it to compile, link, and run independently. Mock needs Stub. Stub function replaces the real business logic function, returns the required result, and assists the test. I involved the related test code for Controllers while writing Kubernetes Operator recently, and there would be mocks for GRPC and HT...
A Sip of Go Log
Logging is indispensable in any code that we need its support both in debugging and in statistics. However, a package that filled withfmt.Println/fmt.Printf printing various messages can never be considered a read-to-be-adopted package, which can be optimized by a simple change, using Golang’s native log package to print information to standard output or to a file. Then, how to apply the log package? Are there any limitations? If so, can we seek open-source packages? Let&rsq...
How to read Haskell like Python
Have you ever been in the situation where you need to quickly understand what a piece of code in some unfamiliar language does? If the language looks a lot like what you’re comfortable with, you can usually guess what large amounts of the code does; even if you may not be completely familiar how all the language features work.For Haskell, this is a little more difficult, since Haskell syntax looks very different from traditional languages. But there's no really deep difference here; you j...
Haskell,Python,Format,Like,Similarity 2011-11-15 08:45:39
A brief guide to tech internships
Planning to be an Intern in the Bay Area during Summer 2012? Make sure to read an Intern's Guide to the Bay Area, and join the 2012 Facebook group. (via this guy, via this guy) Joel Spolsky, from the Joel On Software blog and StackOverflow, wrote an article with Advice for Computer Science College Students back in '05. According to Joel, No matter what you do, get a good summer internship. As such: here’s everything you ever wanted to know about tech inter...
Internship,Advice,CS student 2012-02-01 04:48:31
10 Tips To Make Your C Program Effective
The beauty of any code lies not only in finding the solution to a given problem but is in its simplicity, effectiveness, compactness and efficiency( memory ). Designing the code is harder than actually implementing it. Hence every programmer should keep a couple of basic things in mind while programming in C. Here we introduce you to such 10 ways of standardizing your C code. 1. Avoid unwarranted function calls Consider the following two functions: view source print? 1 void str_print( c...
C,Tips,Efficient,Speed increment,Recursi 2011-08-05 01:34:16
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