Class: Trax::Model::UUIDPrefix

Inherits:
String
  • Object
show all
Defined in:
lib/trax/model/uuid_prefix.rb

Constant Summary collapse

HEX_LETTER_RANGE = 
('a'..'f').to_a.freeze
HEX_DIGIT_RANGE = 
(0..9).to_a.freeze
CHARACTER_RANGE = 
(HEX_DIGIT_RANGE + HEX_LETTER_RANGE).freeze
PREFIX_LENGTH = 
2

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.all ⇒ Object 



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# File 'lib/trax/model/uuid_prefix.rb', line 9

def self.all
  @all ||= begin
    CHARACTER_RANGE.repeated_permutation(PREFIX_LENGTH).to_a.reject! do |permutation|
        (HEX_LETTER_RANGE.include?(permutation[0]) && HEX_LETTER_RANGE.include?(permutation[1]) || HEX_DIGIT_RANGE.include?(permutation[0]) && HEX_DIGIT_RANGE.include?(permutation[1]))
    end.uniq.map do |character_array|
      new(character_array.join)
    end
  end
end

Instance Method Details

#index ⇒ Object 



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# File 'lib/trax/model/uuid_prefix.rb', line 19

def index
  self.class.all.index(self)
end

#next ⇒ Object 



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# File 'lib/trax/model/uuid_prefix.rb', line 23

def next
  self.class.all.at(index + 1)
end

#previous ⇒ Object 



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# File 'lib/trax/model/uuid_prefix.rb', line 27

def previous
  self.class.all.at(index - 1)
end

#to_s ⇒ Object 



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# File 'lib/trax/model/uuid_prefix.rb', line 31

def to_s
  "#{self}"
end