Class: Revolver

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(size, unique: false) ⇒ Revolver

Returns a new instance of Revolver.



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# File 'lib/revolver.rb', line 11

def initialize(size, unique: false)
  @array = []
  @size = size
  @unique = unique
end

Class Method Details

.[](*array) ⇒ Object 



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# File 'lib/revolver.rb', line 7

def self.[](*array)
  from_array(array)
end

.from_array(array, unique: false) ⇒ Object 



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# File 'lib/revolver.rb', line 2

def self.from_array(array, unique: false)
  rev = Revolver.new(array.size, unique: unique)
  array.inject(rev) { |r, e| r << e }
end

Instance Method Details

#[](i) ⇒ Object 



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# File 'lib/revolver.rb', line 28

def [](i)
  @array[i % @size]
end

#pop ⇒ Object 



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# File 'lib/revolver.rb', line 24

def pop
  @array.pop
end

#push(e) ⇒ Object Also known as: << 



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# File 'lib/revolver.rb', line 17

def push(e)
  @array.delete(e) if @unique
  @array << e
  @array.shift if @array.size > @size
  self
end

#size ⇒ Object 



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# File 'lib/revolver.rb', line 32

def size
  @array.size
end

#to_a ⇒ Object Also known as: to_ary 



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# File 'lib/revolver.rb', line 40

def to_a
  @array.dup
end

#to_s ⇒ Object 



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# File 'lib/revolver.rb', line 44

def to_s
  "#<Revolver: #{@array.inspect}>"
end

#unique? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/revolver.rb', line 36

def unique?
  !!@unique
end