Module: Chords::NoteClassMethods

Defined in:
lib/chords/note.rb

Overview

E.g. E + 3 => G

Instance Method Summary collapse

Instance Method Details

#+(interval) ⇒ Object 



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# File 'lib/chords/note.rb', line 44

def +(interval)
  note = NOTES.detect{|n| [n].flatten.include?(self.to_s.gsub(/^.*::/, ''))}
  idx = NOTES.index(note) + interval
  idx = idx % NOTES.size
  Chords.const_get [NOTES[idx]].flatten.first
end

#-(interval) ⇒ Object 



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# File 'lib/chords/note.rb', line 50

def -(interval); self + (-interval) end

#title ⇒ Object 



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# File 'lib/chords/note.rb', line 51

def title; self.to_s.gsub(/^.*::/, '').sub('s', '#') end