Livrona - Software Solutions made simple!

What do Programmers Feel About their Software?

administrator — Wed, 01 Jul 2009 23:35:44 -0700

What do programmers feel about their software? Are they happy with they system? Disgusted? Saddened?

How To Create Your Own Stats Program (JavaScript, AJAX, PHP)

administrator — Wed, 01 Jul 2009 00:41:43 -0700

When creating a website, one main goal is to attract visitors. Traffic generation is a necessity for monetary purposes, showing off your work, or just expressing your thoughts. There are many ways to create traffic for your website. Search engines, social bookmarking, and word of mouth are just a few examples. But how do you know whether this traffic is genuine? How do you know if your visitors are coming back for a second time?..

Why Jailbreak? Top 5 Reasons to jailbreak iPhone

administrator — Wed, 01 Jul 2009 00:32:34 -0700

In brief, jailbreak your iphone means you are allowed to install 3rd party applications on iPhone. This applies to all version of firmware. And, for unlocking iPhone, it refers to the process to open up your iPhone to accept all carriers. Unlocked iPhone allows you to use SIM card from all carriers. You are no longer bind to the official carrier (e.g. AT&T) approved by Apple.

20 Open Source Php Developement Frameworks

administrator — Wed, 01 Jul 2009 00:16:29 -0700

PHP is a widely used programming language for web development. Although there are a lot of alternative programming languages for web development such as ASP and Ruby, but PHP is still the most popular among them.

So, what makes PHP so popular?

20 Promising Open Source Php CMS

administrator — Wed, 01 Jul 2009 00:12:42 -0700

Content Management System, or CMS is an application used to manage news easily so that users can publish, edit and delete articles from the back-end admin system. HTML and other scripting language are not necessary to operate a CMS, though having them will add more advantages.

Runtime Jar File Loader

administrator — Sat, 06 Jun 2009 01:04:14 -0700

Normally all the classes we need to run a java program are packaged in the jar files.
These jars are added to the classpath by the JVM which loaded them as required. What if we want these jars to be added at runtime instead of startup?

This snippet shows how the load class at Runtime by adding the jar path into using

Executing Shell Command

administrator — Mon, 18 May 2009 00:25:13 -0700

This snippets demonstrates how to execute shell command (navtive to OS) and captures its output as if it was running from the command line. Once the command is executed, it waits for it, and captures any output produced by the command and dumps it to the screen.

Remember this piece of code has to be executed from a Unix/Linux shell, or cygwin or dos shell in order for this to work.

Classpath Property Loader

administrator — Mon, 18 May 2009 00:15:11 -0700

 Loading  properties is easy as long as you know the path to the properties file. This can be issue

at times when you either don't know the exact location of the file or it can change based on

environment. In this case loading such file using the classpath loader turns out to handy.

Get StackTrace as String

administrator — Tue, 12 May 2009 22:38:44 -0700

Its easy to print the stack trace using e.printStackTrace() where e is instance of an Exception/Throwable. This prints the trace to the Standard Error stream. But how about if you want to have the stacktrace stored in file or database or want to search as text. This snippets shows how to get the stack trace as String.

How to create nonexistent directories recursively ?

administrator — Fri, 03 Apr 2009 23:48:02 -0700

The following snippet checks if a given directory exists or not. If it does not it, then creates it. It also creates any non existent directories in the path. The magic is performed by the java.io.File mkdirs() method.

How to change Java Application Look and Feel?

administrator — Fri, 03 Apr 2009 23:03:21 -0700

Java Swing API renders the GUI in the Java Look and Feel but at times we want it use a certain look and feel like Motif or Windows or want to change look and feel dynamically from the application itself based on user selection etc. Its very easy to change the l&f of the application using the UIManager.

Display Random Quotes

administrator — Thu, 26 Mar 2009 00:14:51 -0700

Some website display random quotes to its visitors on various pages. The following snippet shows how to display a random quote(when ever the function is invoked) out of list of quotes that are pre populated into the arrary.

What are the different error reporting levels in Php?

administrator — Wed, 25 Mar 2009 23:38:54 -0700

At times you don't see any messages in the log file or you see a blank page instead of output or you only see fatal or critical errors but not information or notice messages etc and you may wonder why. This is because PHP has so many log level. What you see in the logs correspond to error reporting level set at global level in php.ini. This error reporting level can also be overwritten at runtime by in the script.

How to connect and execute query mysql database?

administrator — Sun, 22 Mar 2009 00:31:37 -0700

A very basic and essential snippet for any one starting with php and mysql database i.e. to connect to a given database, execute a custom sql and retrieve the results. The snippet can be modified to execute more than one query or execute an update or insert command instead of the query. The following snippet show exactly how to do so.

Check if Table Exists in a Database

administrator — Sat, 21 Mar 2009 23:59:30 -0700

At times we want to find if a tables exists in a database. The snippet below shows how this can be done. It open a db connection or reuse an already db connection, then selects the given database and finally executes a sql to find out whether the table exists or not.

How to view a gzipped file without extracting it?

administrator — Tue, 17 Mar 2009 23:53:26 -0700

Let's say we have a compressed file in the gzip format and we want to view the content of the file, search a string within in etc. as if it was not a compressed file at all.

One way ofcourse would be gunzip it and then view the contents with less command at the shell prompt, but this approach has 2 disadvantages

1 - It take time to gunzip the file, view the contents and gzip again once done

What are the well known ports used by various services?

administrator — Sun, 15 Mar 2009 20:18:13 -0700

The Well Known Ports are those in the range 0–1023. On Unix-like operating systems, binding a communications socket to a port in this range requires administrative/root privileges. The following is the list of such ports.

J2EE Acronyms

administrator — Sun, 15 Mar 2009 00:17:38 -0700

J2EE (Java 2 Enterprise Edition) comprises a number of technologies. Each of these technologies has an acronym.The following flashcards helps to learn the various acronyms used in J2EE world.

How to change or reset webmin password?

administrator — Sun, 08 Mar 2009 01:10:40 -0800

At times we often forget the webmin password for a given user say root or after repeated failed login attempts webmin locks the account and one cannot login anymore. In order to change/reset the password we need to run a changepass.pl that is provided with webmin by running it from the shell terminal on the server it self.

Caption Contest #1

administrator — Sat, 07 Mar 2009 01:29:23 -0800

Start: 03/09/2009 - 00:10

End: 03/14/2009 - 00:10

Timezone: Etc/GMT

Welcome to Caption Contest #1 for March 2009.

Submit your caption(title) to the picture with a comment below, We will choose 1 (one) finalist based on your votes for your favorite caption. The winner of this contest appear online 15 March 2009.

Rule for Contest

J2EE Singleton

administrator — Fri, 06 Mar 2009 18:41:52 -0800

By David Jones
Introduction
What is a Singleton? The Singleton pattern became widely popular when it was included in the now famous "Gang of Four" Patterns book. Its general objective is to make sure that only one instance of a specific object type exists. The classic code snippet used to create a Singleton is as follows,

Ruby Mini Guide

administrator — Mon, 02 Mar 2009 20:24:05 -0800

Ruby Language Mini Guide

The mini guide attempts to capture the important concepts and constructs that are need to quickly be productive while beginning to learn Ruby. It provides concise information about these relevant topics.

Linux tips every geek should know.

administrator — Sun, 01 Mar 2009 21:32:42 -0800

What separates average Linux users from the super-geeks? Simple: years spent learning the kinds of hacks, tricks, tips and techniques that turn long jobs into a moment's work. If you want to get up to speed without having to put in all that leg-work, we've rounded up over 50 easy-to-learn Linux tips to help you work smarter and get the most from your computer. Enjoy!

How to find the right computer engineer for the job?

livrona — Sun, 01 Mar 2009 21:27:29 -0800

Any bright people that would like to solve it?

How to install SSH Server in Ubuntu?

administrator — Sun, 08 Feb 2009 23:20:00 -0800

Why we need ssh server?

By default ssh (secure shell) service is not installed on Ubuntu. (8.10 as of this writing). So you cannot login into the machine remotely. Having a ssh service running is very useful for securely logging in and working on the box remotely as all the traffic is encrypted between the terminal that issues the commands and the machine executing it.

6 Words That Make Your Resume Suck

administrator — Sun, 08 Feb 2009 21:55:28 -0800

I’ve used a few bad words in my life. S$it, you probably have too. But when the wrong words appear on your resume, it sucks.

These sucky words are not of the four-letter variety. These words are common. They are accepted. They litter the average resume with buzzword badness. Hiring managers can identify sucky words in seconds, leaving your resume work worthless.

Ruby Cheat Sheet Part 1 v1.0

administrator — Thu, 29 Jan 2009 22:56:18 -0800

Why Cheat Sheet?

Any time you start to learn a new language or software having some form of notes like cheat sheet helps to grasp. refer to and revise its concepts. It provides you with simple summarized yet fundamental concepts or procedures to do a task saving valuable time as it reduces the learning curve.

Capture Screen Shot to Image File

administrator — Mon, 19 Jan 2009 01:21:59 -0800

Have you wondered how tools like Snagit capture the display screen and create an image file. Doing that using java AWT is very easy. Just few lines of code. Also you can save the image as JPG, GIF, PNG etc. by just changing the file format input parameter.

How to install Microsoft Fonts or True Type fonts in Ubuntu?

administrator — Sat, 10 Jan 2009 01:31:41 -0800

Fonts are getting better in Linux day by day, but still we want to see the fonts that we have used on Windows systems. They are just appealling to us as we have used them for a long time.
Or what about a document created using MS Word or PowerPoint in Windows using MS Fonts look like on Linux without those fonts?

Tips to prevent RSI (Repetitive Stress Injury)

administrator — Sun, 21 Dec 2008 00:26:52 -0800

Most of us work 8-10 hours a day, sitting in front of the computer all the day long.
We focus our eyes on text/images/videos on screen, type as fast as we could without breaks or moving our hand to use mouse for clicks left and right. Programmers may use more keyboard (with multiple keys pressed at the same time) than a mouse.