First Ruby Program: Ruby Study Notes. Let's open up our plain- text editor. As far as possible, ensure that your editor's Tab is set to 2 spaces. We are now ready to write our first Ruby program. Code layout is pretty much up to you; indentation is not significant (but using two- character indentation will make you friends in the community if you plan on distributing your code). Create a folder named, say. See this tutorial for step by step instructions on installing Ruby in Windows. Now from the Notepad++ menu. On Windows in PowerShell you should see this: You may see different names, before the ruby ex1.rb command. For example, if you saved your file in lrthw/ex1.rb, then you would do cd lrthw/ before trying to run ruby ex1.rb. If you don't know what any of that. Can't run ruby commands from windows command prompt I have installed ruby186-27. This message: 'ruby is not recognized as an internal or external command operable program or batch file.' Means ruby is not in your PATH. If you do not know how to use PowerShell on Windows, Terminal on OS X, or bash on Linux then you need to go learn that first. In your PowerShell (Terminal) program, run ruby -v. You run things in Terminal by just typing the command name and pressing. Installing Ruby on Windows 7 Ruby language is available as open source and ideally you should download the source code and compile it in your development platform to install Ruby. Luckily on Windows, Ruby is available as an installer. In this article I will show you how you can Run Ruby program and compile sources using Notepad++ and how to configure Notepad++ to edit Ruby programs. By the way, I must thank again Bitpsychobyte for this badass article as well as for writing this really. The title of this post is 'Rails Development on Windows. Seriously.' I'm going to discuss the past, the present. Unfortunately it doesn't run on Windows. The next best thing is a tool called Pik. Using Pik, you can install different versions of Ruby including It. We shall store all our programs in this folder. Our first program will display the string 'Hello' on the command window and the name of the program will be say p. By convention, Ruby source files have the . In Microsoft Windows, Ruby source files sometimes end with . The Ruby coding convention states that file/directory name is lower case of class/module name with . For example, Foo class has name foo. Type the following in your editor. Hello'. and then click File/Save As.. Give the name p. 00. To run your program, open a command window and type ruby p. Hello. c: \rubyprograms>. You should see the output as shown above. Note: Ruby is a scripting language. There is no special main method in Ruby from which execution begins. The Ruby interpreter is given a script of statements to execute, and it begins executing at the first line and continues to the last line. Parentheses are usually optional with a method call. These calls are all valid: foobarfoobar()foobar(a, b, c)foobar a, b, cb. In Ruby, everything from an integer to a string is considered to be an object (more on this later). And each object has built in 'methods' (Ruby term for functions) which can be used to do various useful things. To use a method, you need to put a dot after the object, and then append the method name. Some methods such as puts and gets are available everywhere and don't need to be associated with a specific object. Technically speaking, these methods are provided by Ruby's Kernel module (more on this later) and they are included in all Ruby objects (the Kernel module is included by class (more on this later) Object, so its methods are available in every Ruby object). When you run a Ruby application, an object called main of class Object is automatically created. This object provides access to the Kernel methods. Observe: Java and C programmers - no need to write a main method/function. String literals are sequences of characters between single or double quotation marks. Ruby is an interpreted language, so you don't have to recompile to execute the program written in Ruby. The Ruby coding convention states that file/directory name is lower case of class/module name with . For example, Foo class has name foo. Note: The Ruby Logo is Copyright (c) 2. Yukihiro Matsumoto. I have made extensive references to information, related to Ruby, available in the public domain (wikis and the blogs, articles of various Ruby Gurus), my acknowledgment and thanks to all of them. Much of the material on rubylearning. Programming Ruby book, available from The Pragmatic Bookshelf.
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