Sha256: 2300241cee6b207e73cf67802181db4aaeae53f22cbff9a94e83da699dbfad78
Contents?: true
Size: 855 Bytes
Versions: 396
Compression:
Stored size: 855 Bytes
Contents
class Triplets
attr_reader :factors, :sum
def initialize(conditions)
min = conditions.fetch(:min_factor) { 1 }
max = conditions.fetch(:max_factor)
@sum = conditions[:sum]
@factors = (min..max).to_a
end
def to_a
triplets = []
each_triplet do |triplet|
triplets << triplet if select?(triplet)
end
triplets
end
def each_triplet
factors.combination(3).each do |a, b, c|
yield Triplet.new(a, b, c)
end
end
def select?(triplet)
triplet.pythagorean? && (!sum || triplet.sum == sum)
end
end
class Triplet
def self.where(conditions)
Triplets.new(conditions).to_a
end
attr_reader :a, :b, :c
def initialize(a, b, c)
@a = a
@b = b
@c = c
end
def sum
a + b + c
end
def product
a * b * c
end
def pythagorean?
a**2 + b**2 == c**2
end
end
Version data entries
396 entries across 396 versions & 1 rubygems