Class: Coltrane::Frequency

Inherits:
Object
  • Object
show all
Defined in:
lib/coltrane/frequency.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(frequency) ⇒ Frequency

Returns a new instance of Frequency.



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# File 'lib/coltrane/frequency.rb', line 7

def initialize(frequency)
  @frequency = frequency.to_f
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 46

def method_missing(method, *args)
  Frequency[frequency.send(method, args[0].to_f)]
end

Instance Attribute Details

#frequency ⇒ Object (readonly)

Returns the value of attribute frequency.



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# File 'lib/coltrane/frequency.rb', line 5

def frequency
  @frequency
end

Instance Method Details

#/(other) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 39

def /(other)
  case other
  when Frequency then Interval[1200 * Math.log2(frequency / other.frequency)]
  when Numeric then Frequency[frequency / other]
  end
end

#==(other) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 27

def ==(other)
  frequency == (other.is_a?(Frequency) ? other.frequency : other)
end

#octave(n) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 23

def octave(n)
  frequency * 2**n
end

#octave_down(n = 1) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 35

def octave_down(n = 1)
  octave(-n)
end

#octave_up(n = 1) ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 31

def octave_up(n = 1)
  octave(n)
end

#to_f ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 19

def to_f
  frequency
end

#to_s ⇒ Object 



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# File 'lib/coltrane/frequency.rb', line 15

def to_s
  "#{frequency}hz"
end