Class: Coltrane::Theory::ScaleSet

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/coltrane/theory/scale_set.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*scales, searched_notes: nil) ⇒ ScaleSet

Returns a new instance of ScaleSet.



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# File 'lib/coltrane/theory/scale_set.rb', line 9

def initialize(*scales, searched_notes: nil)
  @scales = scales.uniq
  @searched_notes = searched_notes
end

Instance Attribute Details

#scales ⇒ Object

Returns the value of attribute scales.



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# File 'lib/coltrane/theory/scale_set.rb', line 7

def scales
  @scales
end

#searched_notes ⇒ Object

Returns the value of attribute searched_notes.



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# File 'lib/coltrane/theory/scale_set.rb', line 7

def searched_notes
  @searched_notes
end

Instance Method Details

#full_names ⇒ Object 



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# File 'lib/coltrane/theory/scale_set.rb', line 35

def full_names
  map(&:full_name)
end

#names ⇒ Object 



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# File 'lib/coltrane/theory/scale_set.rb', line 31

def names
  map(&:name)
end

#results ⇒ Object 



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# File 'lib/coltrane/theory/scale_set.rb', line 20

def results
  raise 'No searched notes were provided' unless searched_notes
  @table ||=
    scales.each_with_object({}) do |scale, the_table|
      the_table[scale.name] ||= {}
      the_table[scale.name][scale.tone.pitch_class.name] = (
        scale.notes & searched_notes
      )
    end
end

#strict_scales ⇒ Object 



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# File 'lib/coltrane/theory/scale_set.rb', line 14

def strict_scales
  @strict_scales ||= scales.select do |scale|
    (scale.notes & searched_notes).size == searched_notes.size
  end
end