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  How expensive is a MySQL query?

Database access speed is always the bottle neck of many applications. Many application have large amount of data to search, retrieve and display nowadays. How do we improve the performance of our applications, how do we reduce the cost of database access? Apart from the design of database, the quality of the query is also one important factor to take care.  But before that, we need to know how much network traffic a query will consume. Yunyang,Zhang from Nubee in Singapore did some research...

   MySQL,Network traffic,Query     2013-04-09 05:13:33

  Top 9 Most Popular Programming Languages In IT Companies

1.) C LanguageC  Language is a general-purpose computer programming language developed between 1969 and 1973by Dennis Ritchie at the Bell Telephone Laboratoriesfor use with the Unix operating system.Although C was designed for implementing system software. it is also widely used for developing portable application software.?0102030405060708091011#include <stdio.h> int main(void) { printf("hello, world!\n");&nbs...

   C,Java,C#,C++,Ruby,Popular programming l     2011-04-27 09:21:52

  Hello, Kernel!

When we learn module programming, the first small program must be hello, kernel!. For a novice, how do we avoid some mistakes and how to fix the bugs we have when writing the first module program? Is there any example we can refer to? Here is one example. 1. Write the hello.c 01 #include <linux/init.h> 02 #include <linux/module.h> 03 #include <linux/kernel.h> 04 //Compulsory 05 //Module lincese declaration 06 MODULE_LICENSE("GPL"); ...

   module,kernel,Linux     2013-05-03 03:33:52

  Will Google+ be a "Ghost City"

Just now, I read an article about Google+’s status quo. The key point of this article is that it states that Google+ is now a “Ghost City”. According to the article, users of Google+ spend only 3 minutes per month on Google+, this is a very low participation rate for a social network website. After reading this, I wonder whether Google+ is really a Ghost City now, I cannot give my answer. Since it was released just around 8 months ago, so the user base is not very large. ...

   Google+,Social fayigue,User base,Ghost City     2012-02-28 09:44:39

  DESIGNERS NEED ENGINEERS

Like so many of you, I’ve been indulging in the amateur analyses all over the web about why Steve Jobs, p.b.o.h., was so great. The recurring message is pithily summarized by Mathew Ingram: “Technology is the least important thing about Apple products”.Bullshit. The reason why Apple manages to build such magnificent products is because design and usability drive the engineering, yet the technology behind their products is by no means trivial. Apple cares a ...

   Engineer,Designer,Relationship     2011-10-24 11:54:53

  Resolving error "SSL certificate problem: self signed certificate in certificate chain"

In a PHP application, cURL is frequently used to make connection to remote server to request some resource. It can be used to transfer data with different protocols such as HTTP, HTTPS, FTP etc. While using cURL in PHP, someone may get an error with message similar to "SSL certificate problem: self signed certificate in certificate chain". This may happen when cURL tries to make a SSL connection server and the server returns a server certificate which is self-signed and it's not trusted by the c...

   PHP,SSL,CURL,TWILIO     2016-06-26 07:17:23

  Top 10 WhatsApp Tips & Tricks To Try in 2017

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       2017-02-01 03:14:42

  A simple example of drawing bar chart with label using d3.js

D3.js is a very popular graph library to help developers draw various kind of charts using JavaScript in a webpage. It utilizes the SVG format supported by all major modern browsers and can help developers get rid of the old age of Flash or server side graph drawing libraries. In this post, we will introduce some simple examples of drawing bar chart with labels using D3.js.  First, let's see what will be the final look of the graph drawn. Below is the complete source code for this example....

   JAVASCIPT,D3,BAR CHART,LABEL,TUTORIAL     2020-05-16 23:25:40

  Share on Twitter link

Ever wanted to give your readers, or your client’s readers a chance to share the post quickly on Twitter?The code is straight forward:<a href=”http://twitter.com/home?status=Currently reading http://www.test.com/post-url” title=”Click to share this post on Twitter”>Share on Twitter</a>If you’re using WordPress and want to automate this, simply use the following to insert the link to the current post in the loop into your link:<a href=”ht...

   Twitter,Share button,Customize,Custom     2011-08-24 10:55:51

  Install Open webOS on Linux

HP has just released its first beta version of the webOS, It is said the user experience of webOS is quite impressive, so I immediately had it installed on my PC. There are two versions of Beta release,one embedded version and one Ubuntu version. I briefly share my installation experience of webOS in Linux. In the official document, it says "By 'Linux' we mean 'Ubuntu Linux'", it doesn't support server version and 64 bit version of Ubuntu. Here I use Mint 13. 1. Clone source code from github Add...

   Linux,webOS,Ubuntu,embedded,HP     2012-09-10 19:36:30

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