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Applet and Servlet Communication

Java servlets provide a new and exciting method of developing server-side solutions. Servlets provide the features of traditional CGI scripts with the added benefits of efficiency and portability. Currently, major corporations are making the migration from CGI scripts to Java servlets. As a result, the demand for applet and servlet communication is on the rise.

Tagged and Bagged

Ever since Sun Microsystems (aka "the dot in dot-com") came up with Java, the geeks have been screaming themselves hoarse about the wonders of this technology. Terms like "platform-independent code" and "write once, run anywhere" have been given so much airplay that even novice Java developers are aware of them, and the language is also popular with talk-show pundits and Internet consultants, who tout it as the solution to almost all problems of cross-platform compatibility.

Using Regular Expressions with Ruby

Ruby supports regular expressions as a language feature. In Ruby, a regular expression is written in the form of /pattern/modifiers where "pattern" is the regular expression itself, and "modifiers" are a series of characters indicating various options. The "modifiers" part is optional.

Image manipulation and watermarking in PHP with GD2

The following functions are what I usually use to handle images in my projects. We’ve got reScaleImage which will resize and save an image, keeping aspect ratio.

We’ve got constrainImage which will only get new width and height for an image if it is to be scaled using constraints in both x and y. Let’s pretend we’ve got an image that’s 1000×500 and pass its filename and 500 and 500 as constraints on x and y. It should then return 500×250. This function will not actually do anything with the image itself, only get the new dimensions.

Making A Cool Login System With PHP, MySQL & jQuery

Today we are making a cool & simple login / registration system. It will give you the ability to easily create a member-only area on your site and provide an easy registration process.

It is going to be PHP driven and store all the registrations into a MySQL database.

Build a customizable RSS feed aggregator in PHP

RSS (Rich Site Summary, RDF Site Summary, or Really Simple Syndication) has been around since the mid-1990s. Over the years, several variants of the RSS format have popped up and several claims have been made about its ownership. Despite these differences, RSS never ceased to serve its usefulness in distributing Web content from one Web site to many others. The popularity of RSS gave way to the growth of a new class of Web software called the feed reader, also known as the feed aggregator. Although there are several commercially available feed aggregators, it's easy to develop your own feed aggregator, which you can integrate with your Web applications. You'll appreciate this article's fully functional PHP code snippets, demonstrating the use of PHP-based server-side functions to develop a customizable RSS feed aggregator. In addition, you'll reap instant benefits from using the fully functional RSS feed aggregator code, which you can download from this article.

Custom RSS 2.0 Content Feeds using OOP

With WEB 2.0 fast approaching we are scurrying to make our sites ready for the change. Adding syndicated content to get a deeper reach in to this web is one way to get started. In this tutorial i will show you how to make your own RSS 2.0 Content Feed using Object Orientated Programming for your website. At the end of the tutorial there will also be the full script for you to learn by example or just cut out the middle man and use it.

PHP Development: Getting Started

It's been a few years since I echo'd my first HELLO WORLD script. PHP has developed and evolved and yes, it has changed since it was first devised as little Perl extensions on Rasmus Lerdorf's localhost. Still, for a little Home Page script, it has grown into something that is now used on over 200 million websites around the world. That is nothing to be scoffed at. In this article we'll discuss the two most important things we should try to remember when developing in PHP.

How to Count all elements in an array

PHP Count function can count all elements in an array, or properties in an object. Counting an array gives us array kength which is umber of elements it contains.

Building tiny web-applications in Ruby using Sinatra

Sinatra is a library that allows you to build almost any kind of web-based in a very simple manner. When you code in Sinatra you’re bound only by HTTP and your Ruby knowledge. You'll obviously want to start building tiny web-applications and small services, and that's just what we'll do in this article. By the end of this article by Satish Talim, you'll be able to understand how to install Sinatra and its dependencies and how to deploy the tiny web-app to Heroku.

HTML Default Hyperlink Colors

Ever work on hyperlinks on your webpage or blog and suddenly think, "What are the default colors for HTML hyperlinks?". This tutorial answers this question with a handy reference on the default HTML hyperlink colors in their four states.

HTML 5 Tutorial – Rounded Corners

In a previous tutorial, we demonstrated a simple HTML 5 web page layout. In this tutorial, we will change the look of some of the HTML 5 elements and give them rounded corners using CSS (cascading style sheets) rules. We will also separate the elements using margins to give these elements a floating appearance.

Making A Cool Login System With PHP, MySQL & jQuery

We are developing a cool and simple login/registration system in a few easy to follow steps. You can download the complete source code and modify it to fit your own needs.

Connecting to a MySQL Database using Connector/J JDBC Driver

In this tutorial following topics will be covered:

What are Database URLs in JDBC?
Why and how to specify a JDBC Driver name?
How to create a connection to a Database?
An example on how to connect to a MySQL Database?

5 Developing Java Stored Procedures

Oracle JVM has all the features you must build a new generation of enterprise-wide applications at a low cost. The most important feature is the support for stored procedures. Using stored procedures, you can implement business logic at the server level, thereby improving application performance, scalability, and security.

Introduction to VBScript and Windows Script Host

This is a brief introduction to the VBScript language under Windows Script Host (WSH). The target audience is community college students taking their first-year "computer concepts" classes, most of whom have not taken an operating systems class or formal programming language class.

Rolling with Ruby on Rails

Maybe you've heard about Ruby on Rails, the super productive new way to develop web applications, and you'd like to give it a try, but you don't know anything about Ruby or Rails. This article steps through the development of a web application using Rails. It won't teach you how to program in Ruby, but if you already know another object-oriented programming language, you should have no problem following along (and at the end you can find links on learning Ruby).

Four Days on Rails

There have been many extravagant claims made about Rails. For example, Curt Hibbs' Rolling with Ruby on Railsclaimed that you could develop a web application at least ten times faster with Rails than you could with a typical Java framework... The article then goes on to show how to install Rails and Ruby on a PC and build a working "scaffold" application with virtually no coding.

Java file handling tutorial

One of the most frequently used task in programming is writing to and reading from a file. To do this in Java there are more possibilities. At this time only the most frequently used text file handling solutions will be presented

Using the Ruby DBI Module

The Ruby DBI module provides a database-independent interface for Ruby scripts similar to that of the Perl DBI module. This document describes how to write Ruby DBI-based scripts. It is an adjunct to and not a substitute for the Ruby DBI specification documents. See the "Resources" section for a pointer to the specifications and also for information about downloading the example scripts used here.

Using the Ruby MySQL Module

Programs that access MySQL databases can be written in the Ruby scripting language by using Tomita Masahiro's MySQL module. This module provides a Ruby client API; it is implemented as a wrapper around the MySQL C client API. This document describes how to install the MySQL module and use it to write MySQL-based Ruby scripts. A related document describes the Ruby DBI module that provides a higher-level interface that is more abstract and database-independent. See the "Resources" section for a pointer to that document and also for information about downloading the example scripts used here.

A Simple Twitter App with Ruby on Rails – Messages With Ajax

Ruby on Rails is a web application framework that promotes rapid development. Clients’ demands are ever increasing yet they still expect the same quality of output.

101 CSS Techniques Of All Time- Part 1

CSS has fundamentally changed web design, it has provided designers with a set of properties that can be tweaked to make various techniques to make your pages just look right.

Today we are presenting a round-up of 101 CSS techniques designers use all the time. Definitely worth taking a very close look at! This is just the first series , the second part will be coming soon, stay tuned and Enjoy!

50+ Amazing Jquery Examples- Part1

Many of us have been using a good deal of jQuery plugins lately. Below I have provided a list of the 50 favorite plugins many developers use. Some of these you may have already seen, others might be new to you. This is just the first series , the second version will be coming soon, stay tuned and Enjoy!

Using datediff function in Sybase

Returns the difference between two dates. Datediff function calculates the number of date parts between two specified dates. Function takes three arguments. The first is a date part. The second and third are dates. The result is a signed integer value equal to date2 - date1, in date parts.

Building Your First WebServer Application: A Tutorial

DataCraft Paper: Building Your First WebServer Application: A TutorialAfter spending months building a moderate-size application with Oracle's WebServer 2.0 and 2.1, it seems to me there are a lot of things Oracle left out of the manuals. Not secrets, really, just omissions that would have made life easier if they'd been in there. The most frustrating part was getting started. Installation was easy enough - as long as you follow Oracle's instructions to the letter, and review all the log files - but after that I was clueless. Yes, I knew PL/SQL, plus I knew a fair amount about HTML and web servers in general, but there was a large gray muddle between the two that the docs didn't wipe away. (And in case you're wondering, I didn't have time to go to class, I had a deadline.) This paper contains the information I wish I had known when I was just starting.

XHTML Tutorial Part III (Attributes)

In this part of the XHTML tutorial, I will show you the changes to HTML attributes in XHTML. HTML attributes are the extra parts you can add onto tags (such as src in the img tag) to change the way in which they are shown. There are four changes to the way in which attributes are changed.

XHTML Tutorial Part II (XHTML Tags)

One of the major changes to HTML which was introduced to XHTML is that tags must always be properly formed. With the old HTML specification you could be very sloppy in your coding, with missing tags and incorrect formation without many problems but in XHTML this is very important.

Introduction to XHTML

Although many people have never heard of it, XHTML is really the future of the internet. It is the newest generation of HTML (comming after HTML 4) but has many new features which mean that it is, in some ways, like XML. In this tutorial I will explain how XHTML differs from HTML and how you can update your pages to support it.

Simple Perl Database Program?

One of the most common questions I receive nowadays is how to make a simple database program in perl. Therefore, I have decided to make a step-by-step tutorial on how to do so.

Before I continue though, the text file containing the full script is available at database.txt

Though it is very possible (and common) to create powerful database programs using SQL, this tutorial will be based on using pipe-delimited flat file databases. What does all this jargon mean? It just simply states that records in the database will be separated by newlines, and each 'column' in each line is separated using a pipe, or the "|" character. These files are just simple text files as well.

Short guide to DBI (The Perl Database Interface Module)

Relational databases started to get to be a big deal in the 1970's, andthey're still a big deal today, which is a little peculiar, because they're a 1960's technology.

A relational database is a bunch of rectangular tables. Each row of a table is a record about one person or thing; the record contains several pieces of information called fields.

Database Programming with Perl

I'd like to think that I'm a reasonably decent Perl programmer now. I'd like to think that I have a good grasp of how to solve relatively common problems in Perl. But, you know, it hasn't always been this way. Oh no.

A long, long time ago, when I was a tiny little programmer, I worked as a trainee Perl coder and systems administrator for a large database company. Naturally, at a database company, a lot of what we had to do was talking to databases in Perl. As a fresh-faced programmer, the only way I knew to interface with databases was through a command-line SQL client.

Perl Regular Expressions

What are regular expressions and what are they good for? This article covers the very first steps in understanding the concept of regular expressions and their use in Perl.

Multiplexing filhandles with select() in Perl

Sometimes, especially when writing network services, it is necessary to be able to multiplex between several filehandles instead of blocking on read/write operations on them. This article explains how to do this using Perl's select() and the IO::Select module.

Perl File Handling: open, read, write and close files

This article describes the facilities provided for Perl file handling. The command above will associate the FILE filehandle with the file filename.txt. You can use the filehandle to read from the file. If the file doesn't exist - or you cannot read it for any other reason - then the script will die with the appropriate error message stored in the $! variable. What if you wanted to modify the file instead of just reading from it? Then you'd have to specify the appropriate mode using the three-argument form of open.

Realtime Form Validation Using Ajax

If you've ever entered form data on the Internet, you've likely encountered cases where server-side processing is used to validate that the data meets a specified set of criteria. JavaScript may be used on the client-side to validate the format of simple data such as email addresses, phone numbers, dates, or credit card numbers. However, client-side processing is limited in that it cannot apply business rules or access server-side data sources to perform that validation.

Screen capture with PHP and GD

Pierre shows you how to get a screen-shot of a site using PHP and GD2 on Windows. The examples he's presented shows you how to get a screen shot of IE, and goes on to show how to get a site loaded into IE and capture the screen only after the page loads completely on the browser.

This method can be used to capture any kind of window.

C# Basics: switch control statement

We will look up Switch statement in C#. Switch statement is another control statement that handles multiple selections and enumerations. It could be replace with IF statement.

Database driven web counter with PHP/mySQL

This simpel script stores page hits on a database file. In every visit, script counts the hits and updates database. To drive this PHP script , you need PHP, mySQL. You may setup script easily, just copy and paste following code into a page.

Email validation using regular expressions

This ASP.net code validates any input string that was email address or not. First script checkes all charcters are alphanumeric values such as (a-z,A-Z), numbers (0-9), hyphens (-), underscore (_) and periods (.). Our first rule is to check any un-allowed characters exists. Second step to search an @ sign.

Learn to Program using Python: Lesson 1, Getting Started

This is the first in a series of online tutorial lessons designed to teach you how to program using the Python scripting language.

There is something for just about everyone here. Beginners start at the beginning, and experienced programmers jump in further on. You simply need to enter the series of lessons at the point that best fits your prior programming knowledge.

Learn to Program Using Python: Indexing Nested Tuples

A tuple is an immutable ordered list of objects. It can contain references to any type of object. See Learn to Program using Python: Nested Tuples for a more detailed description.

Learn to Program using Python: Unpacking Tuples

You may find it useful to open another copy of this lesson in a separate browser window. That will make it easier for you to scroll back and forth among the different listings, without losing your place, while you are reading about them.

Beginners start at the beginning, and experienced programmers jump in further along. Learn to Program using Python: Lesson 1, Getting Started , provides an overall description of this online programming course.

Learn to Program Using Python: Empty and Single-Item Tuples

Beginners start at the beginning, and experienced programmers jump in further along. Learn to Program using Python: Lesson 1, Getting Started provides an overall description of this online programming course.

Viewing tip

You may find it useful to open another copy of this lesson in a separate browser window. That will make it easier for you to scroll back and forth among the different code fragments, without losing your place, while you are reading about them.

Learn to Program using Python: Nested Tuples

This lesson will expand your knowledge of tuples by teaching you about nesting tuples within other tuples.

Learn to Program Using Python: Variables and Identifiers

I am taking it slow and easy for the first few lessons. My informal discussion is designed to familiarize you with the Python interactive programming environment

This lesson provides an introduction to the use of variables, and the required syntax of the identifiers used to represent variables.

Learn to Program using Python: Let's Do Numbers

This document is part of a series of online tutorial lessons designed to teach you how to program using the Python scripting language.

Something for everyone

There is something for just about everyone here. Beginners start at the beginning, and experienced programmers jump in further along. Learn to Program using Python: Lesson 1, Getting Started provides an overall description of this online programming course.

Firebird Create Table

The Firebird Create Table Tool allows users to visually create tables. After entering in the table name and the number of columns, the tool allows the user to enter the following information for each column of the table ...

Checking if a record exists in Firebird (EXISTS function)

If you need to check whether certain record exists the usual way is to execute the following command and then check if the :idexists variable is greater than zero (this is an example from a stored procedure

Getting Started with MySQL Stored Procedures

In this tutorial, you will write the first simple stored procedure and invoke it from command line of MySQL.

The first stored procedure is very simple. It retrieves all products from products table. First let's take a look at the stored procedure source code bellow...