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  Comparing Floating Point Numbers, 2012 Edition

We’ve finally reached the point in this series that I’ve been waiting for. In this post I am going to share the most crucial piece of floating-point math knowledge that I have. Here it is:[Floating-point] math is hard.You just won’t believe how vastly, hugely, mind-bogglingly hard it is. I mean, you may think it’s difficult to calculate when trains from Chicago and Los Angeles will collide, but that’s just peanuts to floating-point math.Seriously. Each ti...

   Floating point number,Comparison,True value     2012-02-23 07:11:03

  Using keytool to create certificate chain

JDK provides a command line tool -- keytool to handle key and certificate generation. This tool has a set of options which can be used to generate keys, create certificates, import keys, install certificate and export certificates etc. In this tutorial, we will show how to create certificate chain using keytool. If you want to understand how to create certificate chain programmably, please refer to Generate certificate in Java -- Certificate chain. To begin, we first generate a key pair whi...

   JAVA,KEYTOOL,CERTIFICATE CHAIN,CERTIFICATE     2015-12-17 07:09:33

  How Google Tests Software - Part Three

Lots of questions in the comments to the last two posts. I am not ignoring them. Hopefully many of them will be answered here and in following posts. I am just getting started on this topic.At Google, quality is not equal to test. Yes I am sure that is true elsewhere too. “Quality cannot be tested in” is so cliché it has to be true. From automobiles to software if it isn’t built right in the first place then it is never going to be right. Ask any car company that has ever h...

   Google,Software,Testing,Quality,Fidelity     2011-03-22 14:31:00

  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

  8 Optimization Rules To Improve Visibility Of your Ecommerce Store

The success of an Ecommerce store depends on its page rank. If your store pops up in first page then there are higher chances of getting noticed. But getting a spot in page 1 is no mean task as web crawlers are very smart in identifying a quality content. These crawlers follow a specific pattern in setting up a yardstick for a quality content. You need to understand what does a quality content mean from a search engine perspective. Here are the rules to be followed.   #1 Unique content is ...

   marketplace apptha, multi vendor marketplace, magento marketplace     2015-03-09 07:16:16

  Introduction to OAuth (in Plain English)

Last week we talked about giving away your passwords and how you should never do it.  When a website wants to use the services of another—such as Bitly posting to your Twitter stream—instead of asking you to share your password, they should use OAuth instead. OAuth is an authentication protocol that allows you to approve one application interacting with another on your behalf without giving away your password. This is a quick guide to illustrate, as simply as possibl...

   Security,OAuth,Permission,Partial access     2012-04-05 11:39:54

  Examples of bad design

Good designs always help users solve their problems in a convenient and familiar way. It takes little or no time for users getting used to the product with a good design. In contrast, bad designs frequently introduce confusion and complexity to users. Before we design any product, we should think carefully about every aspect of the product. We share some really bad design here to show how they can affect people's life. 1. USB Connector Have you ever put one in right on the first try? We frequen...

   Bad design,Usability,Web design     2013-09-25 22:57:49

  How to Encrypt Your Online Conversations

Do you ever get the feeling that somebody might be listening to or reading your private conversations? You're not crazy.  Online platforms don’t hide that they use data from chats, searches, emails, and other places for targeted advertisements. Aside from being a massive invasion of privacy, it also puts your security at risk.  But it is possible to prevent people from snooping on you. All you need is a little encryption. Check out these different ways you can add encryption into...

   DATA SECURITY,VPN     2020-01-30 07:33:29

  Additional steps need to implement to setup shadow-boxV2 OPTEE on Raspberry PI

We followed the Shadow-box v2 project from the https://github.com/kkamagui/shadow-box-for-arm to set up the trustZone on Raspberry PI modeB to protect the Linux Kernel. But got a problem when doing the step: [3.6.5. Activate Shadow-Box for ARM and Start Secure Pi!] to create the hash for the memory area. The result is not shown. If you met the same problem, this is what I did to fix the problem on my PI: 1.1  When we do the step [3.5.1. Copy OP-TEE OS with Shadow-Box for ARM and N...

   HARDWARE,RASPBERRY PI     2019-05-20 08:52:55

  Microsoft: Apple UI sucks, Metro UI is philosophy

Microsoft is a typical IT company of the last century - a huge strength, but turned a little less sensitive. Now, Microsoft is trying to change the tradition of no connection between home desktop and mobile system developers, the best indicator of this effort is their design.Microsoft products, especially software products, are now gradually using a simple, plain and neat appearance: Metro. But if you think the Metro is just on Windows 8, Windows Phone, the application market and Xbox Live,...

   Windows, Metro UI,Apple     2012-04-13 07:12:21

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