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  /dev/null and /dev/tty in Linux

In Linux, there are two special files /dev/null and /dev/tty. /dev/null will drop all the data written to it, i.e, when program writes data to this file, it means the program has completed the data write operation. But in  fact it does nothing, if you just want the status of a command but not the output of a command, this feature will be very useful. See below shell codes:     /> vi test_dev_null.sh        #!/bin/bash    if grep...

   Linux,/dev/null,/dev/tty     2013-03-04 02:23:23

  Do You Make These 5 Database Design Mistakes?

Look, everyone makes mistakes. It’s true. But not all of us have the chance to make mistakes that end up costing millions of dollars in hardware and production support costs. Any one of the following five mistakes listed below will add additional costs to your company. It’s guaranteed. The costs could be hardware related (extra disk space, network bandwidth), which tend to add up quickly. The costs are also support related (bad performance, database re-design, report cre...

   Database design,Mistake,Advice,Data type,Compatibility     2012-01-03 11:25:13

  The header element in HTML 5

Currently HTML5 is exciting and anyone who want to builds web pages is looking forward to implementing HTML5 new tags into their sites. Definitely HTML5 tags are very rich in functions that make life much easier for both webmasters and end users Within the HTML5 specfication we can see that there have been a significant number of new tags added, one of these the <header> element is what we’ll be covering here. We will talk about when to use it, when not to use it. As we ar...

   HTML5,Header     2012-05-03 09:12:58

  Learning Is More Important Than Knowing

Although DuckDuckGo's success is based more on ideology than technology, you'd have to be a pretty arrogant technologist to not appreciate and be impressed with what this small team (for a long time, 1 person) has accomplished. And while DuckDuckGo teaches us a number of valuable lessons (about business, and privacy), to me, the most important, is that good programmers should be measured by what they can learn, not what they already know. Gabriel Weinberg, DuckDuckGo's creator, has been wo...

   Learning,Knowing,Google,DuckDuckGo     2012-04-18 07:17:53

  Host multiple websites in Wamp

I have decided to start playing around with the Zend Framework. I have a web host (of course) however sometimes when developing I find it is easier and faster to use a local web server, with all the bells and whistles. WAMP, LAMP (this link is ubuntu specific, but any linux distribution should have easy HowTo guide for installing the LAMP software stack), MAMP, all provide the basic environment for beginning web development, and some have nice little GUIs to help you con...

   multiple hosts, wamp, websites, differen     2011-04-04 11:42:06

  Creating a PHP 5 Extension with Visual C++ 2005

This article describes the steps to create a custom PHP extension DLL for the Windows platform. The Zend API documentation that comes with PHP 5 on Windows (see php_manual_en.chm) does a good job explaining how to write extension methods, parse method parameters, and return values. But there is not currently a good step-by-step tutorial on how to get your first extension project up and running on Windows. The aim of this article is to fill that gap. Prerequisites Visual Studio 2005 You can...

   PHP,Extension,Writing,Windows,Step by st     2011-07-23 01:56:53

  What you may not know about PHP session

When we access one website, the site usually should have a mechanism to keep track of the status of the user on the site. There are a few mechanisms supported by many server side languages to help track user status such as session and cookie. Today we will talk about session, when creating a session, we need to keep track of many data, besides user data, we also need to tell the server what is the timeout of the session so that we can garbage collect the session data which should not be stored a...

   PHP session,session timeout,example     2013-07-06 08:44:18

  Consistency between Redis Cache and SQL Database

Nowadays, Redis has become one of the most popular cache solution in the Internet industry. Although relational database systems (SQL) bring many awesome properties such as ACID, the performance of the database would degrade under high load in order to maintain these properties. In order to fix this problem, many companies & websites have decided to add a cache layer between the application layer (i.e., the backend code which handles the business logic) and the storage layer (i.e., the SQL d...

   REDIS,CACHE,DATABASE     2019-07-07 08:14:16

  8 powerful Chrome extensions

Chrome is a powerful browser, one reason why it's so powerful is that it has abundant extensions. There are various extensions in Chrome Web Store. They can meet all kinds of needs you have and they are very easy to install as well. Here we share with you 8 powerful extensions on Chrome. All of them can be downloaded from Chrome Web Store Holmes A bookmark search tool, if you have lots of bookmarks and you even don't know where they are. Hplmes can help you find them in real time by matching tit...

   Chrome,extension     2013-07-31 01:24:18

  Does My Online Business Need Log Aggregation?

Logs crop up all over the place. They are generated by everything from web servers and databases to the firewalls which protect them from breaches. Because logs accumulate in large volumes from all of these different sources, log aggregation is an important process which works to organize and impose order over otherwise disparate log files. That sounds good, but should your online business be eager to jump on the log aggregation bandwagon? Here is a look at the main benefits and considerations t...

   SOFTWARE DESIGN,LOG AGGREGATION     2021-10-12 21:44:39

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