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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4583
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
In addition to defining a new class, the class keyword creates a new constant to refer to the class.

The class name and the constant name are the same, so all class names must begin with a capital letter.
 
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#4584
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Within the body of a class, but outside of any instance methods defined by the class, the self keyword refers to the class being defined.
 
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ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Instantiating an Object


Even though we haven't put anything in our Point class yet, we can still instantiate it:

p = Point.new
 
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#4586
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Initializing a Point:

When we create new Point objects, we want to initialize them with two numbers that represent their X and Y coordinates.

In many object-oriented languages, this is done with a constructor

. In Ruby, it is done with an initialize method:
 
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#4587
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
An object can call initialize on itself, but you cannot explicitly call initialize on p to reinitialize its state
 
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Defining a to_s Method

Any class we define should have a to_s instance method to return a string representation of the object
 
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