Class: Nutriscore::Common::Range

Inherits:
Range
  • Object
show all
Defined in:
lib/nutriscore/common/range.rb

Overview

Range class that supports addition, substraction and comparison. Assumes the objects that the range is composed of is a {Numeric}.

Note that the end range is always included (exclude_end is false).

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.wrap(a) ⇒ Object

Returns a {Nutriscore{Nutriscore::Common{Nutriscore::Common::Range} object from a {Numeric} or {Range}.



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# File 'lib/nutriscore/common/range.rb', line 9

def self.wrap(a)
  if Numeric === a
    Range.new(a, a)
  elsif Range === a
    a
  elsif ::Range  === a
    Range.new(a.first, a.last)
  else
    raise ArgumentError
  end
end

Instance Method Details

#*(a) ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 41

def *(a)
  if Numeric === a
    Range.new(min * a, max * a)
  elsif ::Range === a
    Range.new(min * a.min, max * a.max)
  else
    raise ArgumentError
  end
end

#+(a) ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 21

def +(a)
  if Numeric === a
    Range.new(min + a, max + a)
  elsif ::Range === a
    Range.new(min + a.min, max + a.max)
  else
    raise ArgumentError
  end
end

#-(a) ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 31

def -(a)
  if Numeric === a
    Range.new(min - a, max - a)
  elsif ::Range === a
    Range.new(min - a.max, max - a.min)
  else
    raise ArgumentError
  end
end

#/(a) ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 51

def /(a)
  if Numeric === a
    Range.new(min / a, max / a)
  elsif ::Range === a
    Range.new(min / a.max, max / a.min)
  else
    raise ArgumentError
  end
end

#==(a) ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 61

def ==(a)
  if Numeric === a
    single == a
  else
    super
  end
end

#inspect ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 77

def inspect
  to_s
end

#single ⇒ Object

Returns single value if possible, nil if there is a range of values.



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# File 'lib/nutriscore/common/range.rb', line 82

def single
  min if min == max
end

#to_s ⇒ Object 



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# File 'lib/nutriscore/common/range.rb', line 69

def to_s
  if min == max
    min.to_s
  else
    super
  end
end