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# frozen_string_literal: true
# A PitchClassSet represents a pitch-class set or pitch collection.
# See also: PitchSet, PitchClass
class HeadMusic::PitchClassSet
attr_reader :pitch_classes
delegate :empty?, to: :pitch_classes
alias empty_set? empty?
def initialize(identifiers)
@pitch_classes = identifiers.map { |identifier| HeadMusic::PitchClass.get(identifier) }.uniq.sort
end
def inspect
pitch_classes.map(&:to_s).join(' ')
end
def to_s
pitch_classes.map(&:to_s).join(' ')
end
def ==(other)
pitch_classes == other.pitch_classes
end
def equivalent?(other)
pitch_classes.sort == other.pitch_classes.sort
end
def size
@size ||= pitch_classes.length
end
def monochord?
pitch_classes.length == 1
end
alias monad? monochord?
def dichord?
pitch_classes.length == 2
end
alias dyad? dichord?
def trichord?
pitch_classes.length == 3
end
def tetrachord?
pitch_classes.length == 4
end
def pentachord?
pitch_classes.length == 5
end
def hexachord?
pitch_classes.length == 6
end
def heptachord?
pitch_classes.length == 7
end
def octachord?
pitch_classes.length == 8
end
def nonachord?
pitch_classes.length == 9
end
def decachord?
pitch_classes.length == 10
end
def undecachord?
pitch_classes.length == 11
end
def dodecachord?
pitch_classes.length == 12
end
end
Version data entries
17 entries across 17 versions & 1 rubygems