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16 Cards in this Set
- Front
- Back
class |
Tell Ruby to make a new type of thing |
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object |
Two meanings: the most basic yupe of thing, and any instance of some thing |
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instance |
What you get when you tell Ruby to create a class |
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def |
How you defin a function inside a class. |
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@ |
Inside the functions in a class, @ is a variable for the instance/object being accessed |
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inheritance |
The concept that one class can inherit traits from another class, much like you and your parents |
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composition |
The concept that a class can be composed of other classes as parts, much like how a car has wheels. |
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attribute |
A property classes have that are from composition and are usually variables. |
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is-a |
A phrase to say that something inherits from another, as in "salmon" is-a "fish" |
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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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class X < y |
"Make a class named X that is-a Y." |
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class X: def initialize(J) |
"class X has-a initialize that takes a J parameter." |
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class X: def M(J) |
"class X has-a function named M that takes a J parameter." |
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foo = X() |
"Set foo to an instance of class X." |
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foo.M(J) |
"From foo get the M function, and call it with parameter J." |
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foo.k = Q |
"From foo get the K attribute and set it to Q." |