Ruby

Yukihiro Matsumoto – June 2017

Ruby is a dynamic, open source programming language with a focus on simplicity and productivity
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  • Description
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Ruby is a dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write.

In Ruby, everything is an object. Every bit of information and code can be given their own properties and actions. Object-oriented programming calls properties by the name instance variables and actions are known as methods. Ruby's pure object-oriented approach is most commonly demonstrated by a bit of code which applies an action to a number.

The Ideals of Ruby's Creator: Ruby is a language of careful balance. Its creator, Yukihiro "Matz" Matsumoto, blended parts of his favorite languages (Perl, Smalltalk, Eiffel, Ada, and Lisp) to form a new language that balanced functional programming with imperative programming.

Ruby's Flexibility: Ruby is seen as a flexible language, since it allows its users to freely alter its parts. Essential parts of Ruby can be removed or redefined, at will. Existing parts can be added upon. Ruby tries not to restrict the coder.

For example, addition is performed with the plus (+) operator. But, if you'd rather use the readable word plus, you could add such a method to Ruby's builtin Numeric class.

Ruby's Visual Appearance:

While Ruby often uses very limited punctuation and usually prefers English keywords, some punctuation is used to decorate Ruby. Ruby needs no variable declarations. It uses simple naming conventions to denote the scope of variables.

  • var could be a local variable.
  • @var is an instance variable.
  • $var is a global variable.

These sigils enhance readability by allowing the programmer to easily identify the roles of each variable. It also becomes unnecessary to use a tiresome self. prepended to every instance member.

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Ruby

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