Class: Stave::Theory::Note::PitchClass

Inherits:
Core::Lookup show all
Defined in:
lib/stave/theory/note.rb

Instance Attribute Summary

Attributes inherited from Core::Lookup

#variant

Instance Method Summary collapse

Methods inherited from Core::Lookup

#==, each_key, find_by, #initialize, keys, string_keys, variant, variant?, variant_lookup, variants, where, with_options

Constructor Details

This class inherits a constructor from Stave::Core::Lookup

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/stave/theory/note.rb', line 13

def +(other)
  case other
  when Integer then PitchClass.find_by(index: (index + other) % 7)
  else raise TypeError
  end
end

#-(other) ⇒ Object 



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# File 'lib/stave/theory/note.rb', line 20

def -(other)
  case other
  when Integer then PitchClass.find_by(index: (index - other) % 7)
  else raise TypeError
  end
end