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What's the difference between the class and type methods in Ruby? I've noticed that type works to find the type of some classes but not others.
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Data types in Ruby represents different types of data like text, string, numbers, etc. All data types are based on classes because it is a pure Object-Oriented language. There are different data types in Ruby as follows: Numbers. Boolean.
What is a class in Ruby? Classes are the basic building blocks in Object-Oriented Programming (OOP) & they help you define a blueprint for creating objects. Objects are the products of the class.
What is the difference between a class and a module? Modules are collections of methods and constants. They cannot generate instances. Classes may generate instances (objects), and have per-instance state (instance variables).
A class is terminated by end keyword and all the data members are lies in between class definition and end keyword. Creating Objects using the “new” method in Ruby: Classes and objects are the most important part of Ruby. Like class objects are also easy to create, we can create a number of objects from a single class.
The key difference is that Object#type is deprecated. From the RDoc for Object#type:
Deprecated synonym for Object#class.
Here's why you should use Object#class:
Returns the class of obj, now preferred over Object#type, as an object‘s type in Ruby is only loosely tied to that object‘s class. This method must always be called with an explicit receiver, as class is also a reserved word in Ruby.
In reality, you probably want to use Object#respond_to? instead of checking for the class of an object in most cases.
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