Module: Chords::Note

Includes:
Comparable
Defined in:
lib/chords/note.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#interval ⇒ Object (readonly)

Returns the value of attribute interval.



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# File 'lib/chords/note.rb', line 8

def interval
  @interval
end

#octave ⇒ Object (readonly)

Returns the value of attribute octave.



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# File 'lib/chords/note.rb', line 8

def octave
  @octave
end

Class Method Details

.create_by_value(value) ⇒ Object 



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# File 'lib/chords/note.rb', line 10

def self.create_by_value(value)
  octave = value / 12
  interval = value % 12
  Chords.const_get([NOTES[interval]].flatten.first).new(octave)
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/chords/note.rb', line 38

def +(other); Note.create_by_value(value + other) end

#-(other) ⇒ Object 



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# File 'lib/chords/note.rb', line 39

def -(other); Note.create_by_value(value - other) end

#<=>(other) ⇒ Object 



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# File 'lib/chords/note.rb', line 20

def <=>(other)
  if other.respond_to?(:value)
    value <=> other.value
  else
    value <=> other
  end
end

#coerce(other) ⇒ Object 



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# File 'lib/chords/note.rb', line 28

def coerce(other)
  if other.respond_to?(:value)
    [other.value, value]
  else
    [other, value]
  end
end

#title ⇒ Object 



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# File 'lib/chords/note.rb', line 36

def title; self.class.title end

#value ⇒ Object 



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# File 'lib/chords/note.rb', line 16

def value
  (@octave * 12) + @interval
end