Class: JsonProjection::Fifo

Inherits:
Object
  • Object
show all
Defined in:
lib/json-projection/parser/fifo.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stack = []) ⇒ Fifo

Returns a new instance of Fifo.



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# File 'lib/json-projection/parser/fifo.rb', line 12

def initialize(stack = [])
  @stack = stack
end

Class Method Details

.empty ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 4

def self.empty
  @empty ||= self.new([].freeze)
end

.pure(*vals) ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 8

def self.pure(*vals)
  Fifo.new(vals)
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 28

def ==(other)
  return false unless other.is_a?(Fifo)
  return stack == other.stack
end

#empty? ⇒ Boolean

Returns:



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# File 'lib/json-projection/parser/fifo.rb', line 24

def empty?
  @stack.empty?
end

#hash ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 33

def hash
  stack.hash
end

#pop! ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 20

def pop!
  @stack.pop
end

#prepend!(fifo) ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 37

def prepend!(fifo)
  return if fifo.empty?
  if empty?
    @stack = fifo.stack.dup
    return
  end
  @stack = fifo.stack.concat(@stack)
end

#push!(val) ⇒ Object 



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# File 'lib/json-projection/parser/fifo.rb', line 16

def push!(val)
  @stack.insert(0, val)
end