Class: Stave::Theory::KeySignature

Inherits:

Core::Lookup

• Object
• Core::Lookup
• Stave::Theory::KeySignature

Defined in:

lib/stave/theory/key_signature.rb

Defined Under Namespace

Classes: Group

Instance Attribute Summary

Attributes inherited from Core::Lookup

#variant

Class Method Summary

• .parse(scale) ⇒ Object

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

Class Method Details

.parse(scale) ⇒ Object

# File 'lib/stave/theory/key_signature.rb', line 32

def self.parse(scale)
  accidentals = scale.uniq.map(&:accidental)
  flat_count  = accidentals.count(&:flat?)
  sharp_count = accidentals.count(&:sharp?)

  find_by(flat_count:, sharp_count:)
end