Ruby Exceptions

The execution and the exception always go together. If you are opening a file, which does not exist, then if you did not handle this situation properly, then your program is considered to be of bad quality.
The program stops if an exception occurs. So exceptions are used to handle various type of errors, which may occur during a program execution and take appropriate action instead of halting program completely.

Object Oriented Ruby

Ruby is pure object-oriented language and everything appears to Ruby as an object. Every value in Ruby is an object, even the most primitive things: strings, numbers and even true and false. Even a class itself is an object that is an instance of the Class class. This chapter will take you through all the major functionalities related to Object Oriented Ruby.

Ruby Regular Expressions

A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings using a specialized syntax held in a pattern.
A regular expression literal is a pattern between slashes or between arbitrary delimiters followed by %r as follows:

Ruby/DBI Tutorial

This session will teach you how to access a database using Ruby. The Ruby DBI module provides a database-independent interface for Ruby scripts similar to that of the Perl DBI module.
DBI stands for Database independent interface for Ruby which means DBI provides an abstraction layer between the Ruby code and the underlying database, allowing you to switch database implementations really easily.

Ruby Web Applications - CGI Programming

Ruby is a general-purpose language; it can't properly be called a web language at all. Even so, web applications and web tools in general are among the most common uses of Ruby.
Not only can you write your own SMTP server, FTP daemon, or Web server in Ruby, but you can also use Ruby for more usual tasks such as CGI programming or as a replacement for PHP.
Please spend few minutes with CGI Programming Tutorial for more detail on CGI Programming.

Sending Email using Ruby - SMTP

Simple Mail Transfer Protocol (SMTP) is a protocol, which handles sending e-mail and routing e-mail between mail servers.
Ruby provides Net::SMTP class for Simple Mail Transfer Protocol (SMTP) client-side connection and provides two class methods new and start.

Ruby Socket Programming

Ruby provides two levels of access to network services. At a low level, you can access the basic socket support in the underlying operating system, which allows you to implement clients and servers for both connection-oriented and connectionless protocols.

Ruby/XML, XSLT and XPath Tutorial

What is XML ?

The Extensible Markup Language (XML) is a markup language much like HTML or SGML. This is recommended by the World Wide Web Consortium and available as an open standard.
XML is a portable, open source language that allows programmers to develop applications that can be read by other applications, regardless of operating system and/or developmental language.
XML is extremely useful for keeping track of small to medium amounts of data without requiring a SQL-based backbone.

Web Services with Ruby - SOAP4R

What is SOAP ?

The Simple Object Access Protocol (SOAP) is a cross-platform and language-independent RPC protocol based on XML and, usually (but not necessarily) HTTP.
It uses XML to encode the information that makes the remote procedure call, and HTTP to transport that information across a network from clients to servers and vice versa.

Ruby/Tk Guide

Introduction:

The standard graphical user interface (GUI) for Ruby is Tk. Tk started out as the GUI for the Tcl scripting language developed by John Ousterhout.
Tk has the unique distinction of being the only cross-platform GUI. Tk runs on Windows, Mac, and Linux and provides a native look-and-feel on each operating system.

Ruby/LDAP Tutorial

Ruby/LDAP is an extension library for Ruby. It provides the interface to some LDAP libraries like OpenLDAP, UMich LDAP, Netscape SDK, ActiveDirectory.
The common API for application development is described in RFC1823 and is supported by Ruby/LDAP.

Ruby - Multithreading

Traditional programs have a single thread of execution: the statements or instructions that comprise the program are executed sequentially until the program terminates.
A multithreaded program has more than one thread of execution. Within each thread, statements are executed sequentially, but the threads themselves may be executed in parallel on a multicore CPU, for example. Often on a single CPU machine, multiple threads are not actually executed in parallel, but parallelism is simulated by interleaving the execution of the threads.