Everything you need to know to get started with Ruby
Ruby is a language that takes the word object-oriented very seriously and was created from clay to be object-oriented.
Although it is not slight against the language! It continues to evolve over time with the release of version 1.x. In fact, Ruby 1.9, which was released in 2007, changed the language inconsistently, as many scripts working with 1.8 needed to be rewritten to support it. The larger-sounding release, on the other hand, was largely compatible with previous versions of Ruby 2.0, and the same can be said about 2.1 – both released in 2013.
The creation of Ruby Yukihiro Matsumoto, who felt that there was a lack of proper object-oriented language, and in most languages it was felt that the feature was used. Ruby had tried such a language. The result of that decision is that everything in Ruby is an object. Although some languages distinguish between ‘raw’ data types such as integers and floats, and more complex object-oriented datatypes that support it, this is not the case with Ruby. Even integers and floats are objects that allow for odd looking objects such as the method of calling integers or float values (3.1412.to_s () for example will convert the number 3.1412 into a string).
Yukihiro Matsumoto, Ruby’s creator is working hard on Ruby, we assume.
Another aspect of being an object in Ruby is that even your own code is an object that can be manipulated. In other words, Ruby supports meta-programming. Even classes and functions can be created, modified, passed, and used as objects in Ruby, and as return values in Ruby.
Ruby even has an ‘open’ class, so a class created elsewhere, by someone else, on a different module you can edit your own code to add features. This is not like subclassing, which is supported, you are modifying the class yourself. You can even modify key classes, such as the built-in integer class, to add integer properties. For example, you can add an ‘is_prime’ method to an integer class, and then be able to quickly check whether any number is prime as 17.is_prime or 9.is_prime.
Considering what we’ve said about how easy it is for Ruby to fix things, it may seem strange that Ruby also supports functional programming. Ruby goes through the hassle of identifying a method that has side-effects. Any method that changes the internal state of an object ‘!’ Is marked with. At the end. So if you have an array named ‘arr’, calling ‘arr.sort’ will return a sorted version of the array, while ‘arr.sort!’ The array itself will be sorted in place. It allows people who are willing to program in a functional instance. While Python takes the view that it is best to provide a way to do things (i.e. there are not many alternative forms of syntax for the same thing) Ruby takes the opposite view, it is better to have different ways to do the same thing. Sometimes doing things differently makes them clearer if not better. Which view is better? We say this is a stupid question, and it is foolish to rank thematic perspectives on an objective scale.
If we had a word to explain the meaning of ruby, that word would be ‘rail’. Since the release of Ruby on Rail in 2005, the structure has taken the world of web development by storm. Like it or hate it, it’s impossible to deny that it has had a huge impact. In fact, it was initially Twitter’s preferred structure – they’ve moved on to other technologies since then – and today it runs popular websites like GitHub and Hulu. Rails is a Ruby-based website creation framework that embraces and encourages many software engineering best practices. It greatly simplifies the creation of a comfortable website by automating a large part of the process using auto-code-generation tools and a philosophy of “convention over configuration”. Ruby is the preferred language of the open source social network software Diaspora *. Although the project has never been critical – or has never been – the choice of technology is important for such a project. Diaspora * is not only open source, but also decentralized, allowing people who host their profiles on different servers to be friends.
The Diaspora* Introduced features like social network contact groups (circles) that are now available on both Google+ and Facebook.
Another major consumer of Ruby is YST (yet another setup tool), a collection of tools for Linux administrators to configure different parts of the system. This is software created by the OpenSUSE community for their distro. YaST was originally written in a custom programming language called YCP, with the obvious drawback that only the developers of YaST knew or cared about it. The developers decided to switch to Ruby for their 13.1 release in 2013 because of its popularity with developers and the opportunity to inject fresh blood into this important project. Although Ruby fluctuates up and down the TIOBE rankings, it still remains in the top 20 languages. Although it ranks high (4th) among GitHub languages, with over one million active repositories.
Although the most popular and notable thing that comes with Ruby is the rail. Its flexibility and ease of use, along with the easy installation on hosts like Heroku, have given it a huge boost and it is in great demand.
It’s an easy language to learn, yet quite powerful. It also has the benefit of a large community, and thousands of great libraries and packages.
YaST’s software installer component is a powerful way to search, filter, and install applications on OpenSUSE Linux..
puts “Hello, World”
Ruby is one of the languages that doesn’t require a lot of boilerplate to push basic things like “Hello, World” message on the screen.
1.upto(uarr.length - 1) do |idx|
curr_value = uarr[idx]
pos = idx
while pos > 0 and uarr[pos - 1] > curr_value
uarr[pos] = uarr[pos - 1]
pos -= 1
uarr[pos] = curr_value
This small piece of code may not be the best representation of the Ruby method of problem solving.
A similar ‘real’ example would embrace Ruby features like the Open class by adding features directly to Ruby’s array class. Also since this function is trying to change the array, and has such side effects it is a ‘!’ Should end with.
That said, this code shows some of Ruby’s elegance, such as using constructs like num1.upto (num2) for repetition. Ruby has a lot of idioms that make programming enjoyable.
Tools and Learning Resources
Given the huge community that Ruby enjoys, there is no shortage of dedicated tutorials for language learning. Ruby has a website dedicated to offering detailed interactive tutorials that are not only brilliant, but also free. You can find them at rubymonk.com
Another great website that tests you is rubykoans.com. However, it is best to have the following basic basics in some programming languages. We think it works better when you are introduced to Ruby as a second language rather than a first language
The language that you will find the most obsolete (and most interesting) tutorials for is called “Why (Touching) Ruby’s Guide”. If you don’t want to read this for Ruby, read this for beautiful pictures of ethnic foxes. It is also the only programming language tutorial / guide we can think of that comes with its own soundtrack. You can find this book here
A great deal Effort And love seems to have been put into the “Ken’s (touching) Ruby Guide” to try and try something dull like learning a new programming language entertainment. The fact that it is free and under Creative Commons is even more appealing.
So now that you know where to go if you want to start with Ruby, you probably want to install it on your computer. If you use a Linux or Unix distro, you will be happy to know that it must be available in your distro repository. For Windows and OSX users, the best place to start is ruby-lang.org, the official website of the Ruby programming language. The best version for Windows users is probably available at railsinstaller.org because it also includes Rails (which you might want to check out) and additional Ruby third party components. If you just want to dive into the rail and want a complete stack with a web server and a database server, check out the Bitamy Ruby stack. If you want to get serious about Ruby, you must have a tool called RVM (Ruby Version Manager). This brilliant package allows you to use multiple Ruby versions and multiple Ruby Package versions without getting into the clutter. If you have multiple projects using different versions of the same packages, you may find it very useful. RVM can be installed on Windows, but not directly, it will only work under Cygwin, a Linux compatible layer for Windows.
If you enter Ruby for the web, the bitcoin stack is great Development, Since it has web and database servers and a simple tool to manage them.
Like most programming languages that have been around for a while, Ruby also has many alternative implementations. These may be more appropriate than the official implementation based on what you have to do with Ruby. JRuby, for example, runs on JVM and gives you access to Java class. IronRuby is running .Net And lets you use its features. Rubinius is another alternative implementation of Ruby that uses a JIT compiler for better performance. If you want to develop for iOS and Android, RubyMotion is an implementation to check out, although it’s not as free as the ones mentioned above. Also different from the above, it compiles your Ruby code into an app for those platforms – which is a must for iOS to avoid violating its rules. If you like Ruby and are looking for a cross-platform way to create a mobile app, this might be worth the money. One last tool we want to mention is Pry, an alternative to the default ruby shell (irb). The default Ruby Shell is – please say – functional, which greatly improves the default shell, and it’s just a single command away (`Gem Install Pre).
Pry shell, different from the default shell irbSupports syntax highlighting and code automatic completion.
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