Ruby Quick Guide. Ruby Quick Guide. Ruby Overview. Ruby is a pure object oriented programming language. It was created in 1. Yukihiro Matsumoto of Japan. You can find the name Yukihiro Matsumoto on the Ruby mailing list at www. Matsumoto is also known as Matz in the Ruby community. Ruby is A Programmers Best Friend. Ruby has features that are similar to those of Smalltalk, Perl, and Python. Perl, Python, and Smalltalk are scripting languages. Smalltalk is a true object oriented language. Ruby, like Smalltalk, is a perfect object oriented language. Using Ruby syntax is much easier than using Smalltalk syntax. Features of Ruby. Ruby is an open source and is freely available on the Web, but it is subject to a license. Ruby is a general purpose, interpreted programming language. Ruby is a true object oriented programming language. Ruby is a server side scripting language similar to Python and PERL. Ruby can be used to write Common Gateway Interface CGI scripts. Resources/images/intStarting.jpg' alt='No Custom Exception Handler Installed Above Ground' title='No Custom Exception Handler Installed Above Ground' />Ruby can be embedded into Hypertext Markup Language HTML. Ruby has a clean and easy syntax that allows a new developer to learn very quickly and easily. Ruby has similar syntax to that of many programming languages such as C and Perl. Ruby is very much scalable and big programs written in Ruby are easily maintainable. No Custom Exception Handler Installed Above Ground' title='No Custom Exception Handler Installed Above Ground' />Applies to mailable products Sold by Sears and Kmart. Excludes Marketplace and delivery items. Additional exclusions apply. Please see offer details on qualifying. Listen to your favorite CDs anywhere on the GPX Portable CD Player. Play CD and CDRRW discs, and enjoy features like 60second skip protection, p. The Strawman Has a Point trope as used in popular culture. A Straw Character exists in a work to represent a caricature of a position which the author wants. Ruby can be used for developing Internet and intranet applications. Ruby can be installed in Windows and POSIX environments. Ruby support many GUI tools such as TclTk, GTK, and Open. GL. Ruby can easily be connected to DB2, My. SQL, Oracle, and Sybase. Ruby has a rich set of built in functions, which can be used directly into Ruby scripts. Tools You Will Need. For performing the examples discussed in this tutorial, you will need a latest computer like Intel Core i. GB of RAM 4. GB of RAM recommended. You also will need the following software Linux or Windows 9. NT or Windows 7 operating system. Apache 1. 3. 1. 9 5 Web server. Internet Explorer 5. Web browser. Ruby 1. This tutorial will provide the necessary skills to create GUI, networking, and Web applications using Ruby. It also will talk about extending and embedding Ruby applications. What is Next The next chapter guides you to where you can obtain Ruby and its documentation. Finally, it instructs you on how to install Ruby and prepare an environment to develop Ruby applications. Ruby Environment Setup. Local Environment Setup. If you are still willing to set up your environment for Ruby programming language, then lets proceed. This tutorial will teach you all the important topics related to environment setup. We would recommend you to go through the following topics first and then proceed further Popular Ruby Editors. To write your Ruby programs, you will need an editor If you are working on Windows machine, then you can use any simple text editor like Notepad or Edit plus. VIM Vi IMproved is a very simple text editor. This is available on almost all Unix machines and now Windows as well. Otherwise, your can use your favorite vi editor to write Ruby programs. Ruby. Win is a Ruby Integrated Development Environment IDE for Windows. Ruby Development Environment RDE is also a very good IDE for windows users. Interactive Ruby IRbInteractive Ruby IRb provides a shell for experimentation. Within the IRb shell, you can immediately view expression results, line by line. This tool comes along with Ruby installation so you have nothing to do extra to have IRb working. Just type irb at your command prompt and an Interactive Ruby Session will start as given below. Hello World. irbmain 0. Do not worry about what we did here. You will learn all these steps in subsequent chapters. What is Next We assume now you have a working Ruby Environment and you are ready to write the first Ruby Program. The next chapter will teach you how to write Ruby programs. Ruby Syntax. Let us write a simple program in ruby. All ruby files will have extension. So, put the following source code in a test. Live Demo. usrbinruby w. Hello, Ruby. Here, we assumed that you have Ruby interpreter available in usrbin directory. Now, try to run this program as follows. This will produce the following result. You have seen a simple Ruby program, now let us see a few basic concepts related to Ruby Syntax. Whitespace in Ruby Program. Business Vocabulary Builder Macmillan Download Skype. Whitespace characters such as spaces and tabs are generally ignored in Ruby code, except when they appear in strings. Sometimes, however, they are used to interpret ambiguous statements. Interpretations of this sort produce warnings when the w option is enabled. Example. a b is interpreted as ab Here a is a local variable. Here a is a method call. Line Endings in Ruby Program. Ruby interprets semicolons and newline characters as the ending of a statement. However, if Ruby encounters operators, such as plus, or backslash at the end of a line, they indicate the continuation of a statement. Ruby Identifiers. Identifiers are names of variables, constants, and methods. Ruby identifiers are case sensitive. It means Ram and RAM are two different identifiers in Ruby. Ruby identifier names may consist of alphanumeric characters and the underscore character. Reserved Words. The following list shows the reserved words in Ruby. These reserved words may not be used as constant or variable names. They can, however, be used as method names. BEGINdonextthen. ENDelseniltruealiaselsifnotundefandendorunlessbeginensureredountilbreakfalserescuewhencaseforretrywhileclassifreturnwhiledefinselfFILEdefined LINEHere Document in RubyHere Document refers to build strings from multiple lines. Following a lt lt you can specify a string or an identifier to terminate the string literal, and all lines following the current line up to the terminator are the value of the string. If the terminator is quoted, the type of quotes determines the type of the line oriented string literal. Notice there must be no space between lt lt and the terminator. Here are different examples Live Demo. EOF. This is the first way of creating. EOF same as above. This is the second way of creating. EOC execute commands. This will produce the following result. This is the first way of creating. This is the second way of creating. I said foo. I said bar. Ruby BEGIN Statement. Syntax. Declares code to be called before the program is run. Example Live Demo. This is main Ruby Program. Initializing Ruby Program. This will produce the following result. Initializing Ruby Program. This is main Ruby Program. Ruby END Statement. Syntax. Declares code to be called at the end of the program. Example Live Demo. This is main Ruby Program. Terminating Ruby Program. Initializing Ruby Program. This will produce the following result. Initializing Ruby Program. This is main Ruby Program. Terminating Ruby Program. Ruby Comments. A comment hides a line, part of a line, or several lines from the Ruby interpreter. You can use the hash character at the beginning of a line. I am a comment. Just ignore me. Or, a comment may be on the same line after a statement or expression. Madisetti This is again comment. You can comment multiple lines as follows. This is a comment. This is a comment, too. This is a comment, too. I said that already. Here is another form. This block comment conceals several lines from the interpreter with beginend. This is a comment. This is a comment, too. This is a comment, too. I said that already. Ruby Classes and Objects. Ruby is a perfect Object Oriented Programming Language. The features of the object oriented programming language include Data Encapsulation. Data Abstraction. Polymorphism. Inheritance. These features have been discussed in the chapter Object Oriented Ruby. An object oriented program involves classes and objects. A class is the blueprint from which individual objects are created. In object oriented terms, we say that your bicycle is an instance of the class of objects known as bicycles. Take the example of any vehicle.