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Hash table is probably the most commonly used data structure in software industry. Most implementations focus on its speed instead of memory usage, yet small memory footprint has significant impact on large in-memory tables and database hash indexes. In this post, I”ll provide a step by step guide for writing a modern hash table that optimize for both speed and memory efficiency. I’ll also give so
Many assembly tutorials and books doesn’t cover how to write a simple assembly program on the Mac OS X. Here are some baby steps that can help people who are also interested in assembly to get started easier. Mach-O file format To get started on writing OSX assembly, you need to understand OSX executable file format – the Mach-O file format. It’s similar to ELF, but instead of sections of data, bs
This is an annoying problem that related to my recent project. The goal is simple: handle single touch event in UIWebView and let it handle other touch events as defaults. However this is really hard to achive… Edit: 6/20 I found this post:DETECTING TAPS AND EVENTS ON UIWEBVIEW – THE RIGHT WAY. He handles touch event via - (void) sendEvent:(UIEvent*) event instead of UIGesutreRecognizer. His appro
People say that emacs is the most extendable editor in the world; however, I didn’t really understand how powerful it is until one of it extension Swank.js blowed my mind. Take a look at this awesome screen cast produced by emacs rocks. Awesome, is it? However, installing swank.js is really nontrivial. As a result, I want to share my note on setting up swank.js on my machine. System information Ma
It is often to embed a UIWebView in an iOS app. However it doesn’t provide the powerful webkit inspector by default. Nathan de Vries has written a post to solve the problem, but the solution didn’t work on my XCode 4 with Clang front end. This is Nathan’s solution: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // ...Snipped... [NSCla
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