term1 Definition1term2 Definition2term3 Definition3
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class
Tell Ruby to make a new type of thing
object
Two meanings: the most basic yupe of thing, and any instance of some thing
instance
What you get when you tell Ruby to create a class
def
How you defin a function inside a class.
@
Inside the functions in a class, @ is a variable for the instance/object being accessed
inheritance
The concept that one class can inherit traits from another class, much like you and your parents
composition
The concept that a class can be composed of other classes as parts, much like how a car has wheels.
attribute
A property classes have that are from composition and are usually variables.
is-a
A phrase to say that something inherits from another, as in "salmon" is-a "fish"
has-a
A phrase to say that something is composed of other things or has a trait, as in "a salmon has-a mouth"
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