Class: Range

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

Direct Known Subclasses

UniqSysOmega::Tariffs::SortableRange

Instance Method Summary collapse

Instance Method Details

#intersection(other) ⇒ Object Also known as: &

Raises:

  • (ArgumentError) 


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

def intersection(other)
  raise ArgumentError, 'value must be a Range' unless other.kind_of?(Range)
  raise ArgumentError, 'must be the same end inclusive/non-inclusive type' unless exclude_end? == other.exclude_end?
  
  min, max = first, last
  other_min, other_max = other.first, other.last

  new_min = self === other_min ? other_min : other === min ? min : min == other_min ? min : nil
  new_max = self === other_max ? other_max : other === max ? max : max == other_max ? max : nil

  new_min && new_max ? (exclude_end? ? new_min...new_max : new_min..new_max) : nil
end

#subtract(range) ⇒ Object Also known as: -

Raises:

  • (ArgumentError) 


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# File 'lib/regioned_calculation.rb', line 37

def subtract(range)
  return [ self ] unless range
  raise ArgumentError, 'must be the same end inclusive/non-inclusive type' unless exclude_end? == range.exclude_end?

  common = self & range
  return [ self ] unless common

  # отрезок вычли полностью
  return [ ] if common == self

  if self.end == common.end
    return [ Range.new( self.begin, common.begin, exclude_end? ) ]
  end

  if self.begin == common.begin
    return [ Range.new( common.end, self.end, exclude_end? ) ]
  end

  [ Range.new( self.begin, common.begin, exclude_end? ),
    Range.new( common.end, self.end, exclude_end? ) ]    
end