set.md

Set Checker

In the card game of Set, each card has four distinct attributes:

• shape (diamond, oval, squiggle)
• colour (green, red, purple)
• fill (blank, lined, filled)
• count (one, two, three)

A set is made from any three cards where the attributes are either all the same or all different.

In our application, a Set card is modelled by:

Card = Struct.new(:shape, :colour, :fill, :count)

(All attributes are passed as symbols.)

Your task is to implement the following function which takes three Card objects as input, and returns true if the three cards make a set, or false otherwise.

def set?(*cards)
  # Add your implementation here
end

Constraints:

• All cards in a deck of Set are unique, so you don't need to care about looking for duplicates.