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  Using C for a specialized data store

Pixenomics stores and transports 1.2 million pixels from the server to the client. During development we played with various methods to store and process this. Our ultimate goal was to send the entire board in under 1 second. During the stages of prototyping we used a MySQL database without thinking too much about performance. With a mere 2,000 pixels we quickly realised this wasn’t even usable as a demo. Changing the storage engine to memory was much better but still obviously unu...

   C,Data store,Efficiency,Performance     2012-03-07 05:09:38

  Microsoft unveils a new logo

When releasing Windows 8, many people thought that Microsoft would use the blue logo as company's logo. But we are "cheated", Microsoft unveils a new logo. Watch video below. Since unveiling its first logo in 1977, Microsoft has changed its logo a few times, they are  In 1977, its "Micro-Soft" Microsoft "blibbet" logo, filed August 26, 1982 at the USPTO and used until 1987. Microsoft "Pac-Man" logo, designed by Scott Baker and used from 1987 to 2012 with the 1994–2002 slogan"W...

   Microsoft,Logo,Windows 8     2012-08-23 20:04:03

  Converting Decimal Fractions to Binary

Converting Decimal Fractions to Binary In the text proper, we saw how to convert the decimal number 14.75 to a binary representation. In this instance, we \"eyeballed\" the fractional part of the binary expansion; 3/4 is obviously 1/2 + 1/4. While this worked for this particular example, we\'ll need a more systematic approach for less obvious cases. In fact, there is a simple, step-by-step method for computing the binary expansion on the right-hand side of the point. We will illustrate the metho...

   Decimal,Fractional,Binary     2011-03-19 06:45:35

  Why cannot compare double values directly for equality?

A question in PHP: Get some value from the database and use floatval() to convert it to floatint point value, then compare it with another value which is also converted to floating point value with floatval(). These two values are the same when using var_dump() to output, the two outputs are float(8.87), they are the same. But when comparing them for equality, the result is weird., they are not equal. Why?To analyze this question, we need to start with PHP data types. PHP uses weak types. In PHP...

   PHP,floating, precision,compare,equality     2012-06-27 09:01:36

  HTML5 History of 20th Century Music

We've seen some neat interactive HTML5 infographics before -- but the periodic table, for example, doesn't really care that much about time.Visual representation of time introduces numerous complications. Traditional ways of representing time visually were, roughly speaking, translations of dimension-type, from temporal to spatial; the mapping selected would depend on what kind of temporal relation was meaningful for the particular application. For example, circles represent cyclical beha...

   HTML5,JavaScript,Music,Timeline     2011-12-16 09:35:55

  SOME LESSONS LEARNED

Note: Google was kind enough to invite me to give a short talk at their Zeitgeist conference earlier this week. It was a really interesting conference and I got a chance to meet a lot of people I admire. For my talk, I decided to use material from some of my blog posts over the years that I thought might appeal to a broader audience. Unfortunately, I was still recovering from a nastly cold/flu so I didn’t deliver the talk as well as I’d like.  Below is the text.Today, I wanted...

   Investor,Startup,Lesson,Experience,Investment     2011-10-12 11:47:02

  Efficiency of code execution

If you want to optimize your program codes, you need to find their Hotspot, i.e, the codes which are executed most frequently. If you can optimize this portion of codes a bit, you may gain much improvement of your code efficiency. Here I give you three examples about efficiency of code execution.1. PHP's Getter and Setter (From Reddit)This example a quite simple, you can skip it if you want.Consider the code below, we can find it's slower when we use Getter/Setter method to read a member variabl...

   Code, Efficiency,Analysis,Trick     2012-07-13 10:59:21

  Top 10 WhatsApp Tips & Tricks To Try in 2017

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       2017-02-01 03:14:42

  Google launches Google Keep

According to Tencent Tech, Google announced the launch of Google Keep on Wednesday This is a note application similar to Evernote, its philosophy is to help you save everything you want to remember, including text and images and other notes, they can be instantly synchronized among different devices so that users can get the information they want at any time. This is a free service, it provides support for Web and Android 4.0 or later devices, users can navigate to Drive.Google.com/Keep or downl...

   Google Keep,Evernote,Synchronization     2013-03-21 13:00:02

  Ruby net-scp cannot scp multiple files with asterisk(*)

net-ssh/net-scp is a Ruby gem which can be used to scp files between different *nix machines. It's similar to how the *nix scp command. It can be used to scp a file or a directory. However, it seems it has some problem to scp multiple files using pattern *. For example, below script is supposed to download all files from remote directory to local directory: require 'net/scp' host = 'testmachine' login = 'testaccount' password = "testpassword" remote_path = '/tmp/remote...

   NET-SCP,RUBY,ASTERISK,MULTIPLE FILES     2016-10-20 03:00:13

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