CK's Developer Blog

Aptitude Questions and Answers at SkillRack.com

Karthikeyan C — Fri, 20 Aug 2010 11:29:49 +0000

The following on-line mock exams contains questions and answers related to quantitative aptitude, verbal, logical and analytical reasoning. These questions are helpful to college students (Freshers) in preparing for job interviews (Campus recruitment placement).

The current list of exams are provided below.

Create FREE online exams at SkillRack.com

Karthikeyan C — Sat, 17 Jul 2010 08:27:48 +0000

Now users can register for FREE, create on-line exams at SkillRack and share their exams in any blog or website. No registration is required to take the exam.

You get the detailed score report of each exam.

Please visit http://skillrack.com/blog/index.php/2010/07/13/create-your-online-exams-and-share-for-free-test-takers-need-not-register/ for more details.

Command to update awstats via terminal

Karthikeyan C — Tue, 13 Jul 2010 18:27:50 +0000

sudo /usr/lib/cgi-bin/awstats.pl -config=www.yourdomainname.com -update

Note: To install awstats in Ubuntu please follow the instructions in this link

and update the LogFormat to 1 instead of 4 when using Apache2.

Solution to PrimeFaces p:schedule overlapping p:menubar drop down

Karthikeyan C — Mon, 14 Jun 2010 18:30:03 +0000

The problem under consideration is what is discussed in this forum post.

http://primefaces.prime.com.tr/forum/viewtopic.php?f=3&t=2696&start=0

The solution is to assign a z-index of value zero to p:schedule. A lower value will send it behind the page background. Making the z-index for p:menubar also did not do the trick. May be the drop down did not inherit the z-index of menubar properly and as a result the drop down had a lower z-index than the p:schedule.

So instead of increasing z-index of menubar and its content, the solution i found was to make the z-index of the p:schedule zero as in the below code.

Chrome error – NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7

Karthikeyan C — Mon, 07 Jun 2010 04:18:27 +0000

I came across the below error in Chrome while rendering a page ( the same page was working fine in Firefox, Opera).

NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7

I was using JSF 1.2 with Facelets. The solution is to mention the contentType attribute value as text/html in the f:view tag.

Note: If the content is not mentioned as text/html, strict validation will occur where few DOM modifications like assigning to innerHTML is prohibited and hence the error.

Installing Eclipse Java EE (JEE) Galileo in Windows 7 using 64 bit JDK

Karthikeyan C — Thu, 03 Jun 2010 05:15:45 +0000

Normally I do not do any development in Windows (I use Ubuntu for it). But recently tried setting up DEV environment in Windows 7 64 bit for a project which had Eclipse Java EE version – Galileo as the IDE.

I downloaded and installed 64 bit JDK 1.6.20 and then downloaded Eclipse JEE bundle for Windows platform. When i tried to run Eclipse it spit out an error dialog as it was a 64 bit JDK.

I searched for a 64 bit Eclipse JEE bundle but as on date cannot find one. Hence uninstalled 64 bit JDK and installed 32 bit JDK and continued with the setup.

Hope Eclipse soon comes out with a 64 bit JEE version soon.

MySQL – Select records matching date, ignoring the time portion

Karthikeyan C — Sat, 29 May 2010 17:26:29 +0000

Let us assume you have tasks scheduled for a given day in a planner. You wish to select all tasks in the given day. The following query will serve the purpose (the DATE function does the trick)


select * from task where DATE(startdatetime) = DATE('2010-05-29');

Ajax support for rich:calendar

Karthikeyan C — Thu, 27 May 2010 07:30:04 +0000

For Ajax support when the date is selected using rich:calendar, we can add the following

Please note that the event is onchanged instead of onchange

Installing Canon Printer Driver in Ubuntu 10.04

Karthikeyan C — Tue, 25 May 2010 18:45:04 +0000

I bought a Canon LBP2900B printer yesterday and successfully installed it in Ubuntu (10.4). I had 64 bit Ubuntu installed and hence downloaded the file http://codebin.cotescu.com/canon/lbp_driver/CanonCAPTdriver.tar.gz and executed the command sudo ./canonLBP_install.sh LBP2900 (LBP2900 is same as LBP2900B) after navigating to the directory where i extracted the tar file.

Further details can be found at http://radu.cotescu.com/2010/03/20/how-to-install-canon-lbp-printers-in-ubuntu/

Custom Styling rich:inputNumberSlider of RichFaces

Karthikeyan C — Wed, 19 May 2010 06:39:06 +0000

The default look and feel of arrows of rich:inputNumberSlider in RichFaces is not very great (May be they did it intentionally for the users to customize it).

The following CSS styles have to be overridden.

rich-inslider-inc-horizontal, rich-inslider-inc-horizontal-selected

rich-inslider-dec-horizontal, rich-inslider-dec-horizontal-selected

rich-inslider-handler, rich-inslider-handler-selected

As an example, I have provided my styles below.


.rich-inslider-inc-horizontal,.rich-inslider-inc-horizontal-selected {
 background-image:url("/img/rightarrow.png");
}

.rich-inslider-dec-horizontal,.rich-inslider-dec-horizontal-selected{
 background-image:url("/img/leftarrow.png");
}

.rich-inslider-handler,.rich-inslider-handler-selected{
 background-image:url("/img/sliderpos.png");
 width:16px;
 height:16px;
}