Object Oriented Words

Front 1

class

Back 1

tell Ruby to create a new type of thing.

Front 2

object

Back 2

the most basic type of thing, and any instance of something.

Front 3

instance

Back 3

What you get when you tell Ruby to create a class.

Front 4

def

Back 4

how you define a function inside a class

Front 5

@

Back 5

inside the functions in a class, @ is a variable for the instance/object being accessed.

Front 6

inheritance

Back 6

the concept that one class inherits traits from another class, much like you and your parents

Front 7

composition

Back 7

the concept that a class can be composed of other classes as parts, much like how cars have wheels

Front 8

attribute

Back 8

a property a classes have that are from composition and are usually variables

Front 9

is-a

Back 9

A phrase to say that something inherits from another as in salmon is-a fish

Front 10

has-a

Back 10

A phrase to say that something is composed of other things or has a trait, as in salmon has-a mouth

Front 11

classX(Y)

Back 11

Make a class named X that is-a Y

Front 12

class X(object): def initialize(J)

Back 12

Class X has-a initialize with that takes parameter J

Front 13

class X(object): def M(J)

Back 13

Class X has-a function M that takes a parameter J

Front 14

foo = X()

Back 14

set foo to instance of class X

Front 15

foo.X(M)

Back 15

from foo get function X and call it with parameters J

Front 16

foo.K = Q

Back 16

from foo get the K attribute and set it to Q