This minipost will explain in detail the difference between the lower case %w and the uppercase %W percent string literals in Ruby on string interpolation cases and escape sequences.
One tricky part in terms of its syntax, is the interpolation of a Ruby Symbol. This minipost aims to demonstrate Ruby Symbol interpolation and also how to add a space between two seperate words on a Ruby symbol declaration.
This minipost will demonstrate how to update rbenv version when you have installed it through git to your system. To be more specific, we will update rbenv from version 1.1.0 to version 1.1.1 via git pull.
When you install rbenv with git to your machine, it does not update automatically all the new available ruby versions. Therefore, you need to update by git pulling the latest stable release. This minipost will demonstrate step-by-step how to configure your rbenv with the latest stable release of Ruby.
When you want to protect objects from being changed inside the methods you send them, Ruby offers some methods to preserve that original objects will not get altered in method calls. These methods are: dup and clone which are very similar with two differences.
Both -v and --version are command line switches that interact with the Ruby interpreter by instructing the output of Ruby version information. Although both can be used in the same way there is a small difference between them.
While experimenting with code snippets on your irb (Interactive Ruby Interpreter) session, you might want to keep things clearer. This minipost demonstrates how to hide session returns and make irb prompt shorter allowing better focus on code execution.
There are three basic output methods in Ruby: print, puts and p. All these methods are used to output messages, results and valuable information during the execution of a Ruby program. However, there are some differences which are going to be demonstrated in this minipost.
In Ruby, there are three ways of negating conditions. The first one is the not keyword. The second one is with the negating ! (the bang operator of negation). The third and more natural sounding way of negating is the unless keyword. The keyword unless, express the exact same semantics as if not (expression) and if !(expression).