Category: Methods

Standard Ruby Tools The standard Ruby distribution contains useful tools along with the interpreter and standard libraries − These tools help you debug and improve your Ruby programs without spending much effort. This tutorial will give you a very good start with these tools. Additional Ruby Tools There are other useful tools that don’t come…

The following table lists all the Ruby’s Predefined Constants − NOTE − TRUE, FALSE, and NIL are backward-compatible. It’s preferable to use true, false, and nil. Sr.No. Constant Name & Description 1 TRUESynonym for true. 2 FALSESynonym for false. 3 NILSynonym for nil. 4 ARGFAn object providing access to virtual concatenation of files passed as command-line…

Ruby’s predefined variables affect the behavior of the entire program, so their use in libraries is not recommended. The values in most predefined variables can be accessed by alternative means. Following table lists all the Ruby’s predefined variables. Sr.No. Variable Name & Description 1 $!The last exception object raised. The exception object can also be…

Since the Kernel module is included by Object class, its methods are available everywhere in the Ruby program. They can be called without a receiver (functional form). Therefore, they are often called functions.A complete list of Built-in Functions is given here for your reference − Functions for Numbers Here is a list of Built-in Functions related to number. They…

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…

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/LDAP Installation You can download and install a complete Ruby/LDAP package from SOURCEFORGE.NET. Before installing Ruby/LDAP, make sure you…

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. The basic…

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. SOAP…

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…

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 also has libraries that provide higher-level access to specific application-level network protocols, such as FTP,…