Ruby Intermediate Flashcards
class
tell Ruby to make a new kind of thing
object
two meanings: the most basic kind of thing, any instance of something
instance
What you get when you tell Ruby to create a class
def
how you define a function inside of a class
@
Inside the function of a class, @ is a operator for variables in 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 a salmon is a fish
has-a
a phrase to say that something is composed of other things or has a trait, as in salmon has a mouth
class X(Y)
Make a class named X that is-a Y
Class X(Object) def initialize(J)
class X has-a initialize that takes J parameters
class x(object) def M(J)
class X has-a function named M that takes J parameters
foo = x()
Set foo to an instance of class X
foo.M(J)
class X has-a function named M that takes J parameters
