Class: Date::Infinity

Inherits:

Numeric

• Object
• Numeric
• Date::Infinity

show all

Includes:

Comparable

Defined in:

lib/date.rb

Overview

Instance Method Summary (collapse)

• - (Object) +@
• - (Object) -@
• - (Object) <=>(other)
• - (Object) abs
• - (Object) coerce(other)
• - (Boolean) finite?
• - (Boolean) infinite?
• - (Infinity) initialize(d = 1) constructor

  A new instance of Infinity.

• - (Boolean) nan?
• - (Object) to_f
• - (Boolean) zero?

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# File 'lib/date.rb', line 12

def initialize(d=1) @d = d <=> 0 end

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# File 'lib/date.rb', line 26

def +@ () self.class.new(+d) end

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# File 'lib/date.rb', line 25

def -@ () self.class.new(-d) end

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

def <=> (other)
  case other
  when Infinity; return d <=> other.d
  when Numeric; return d
  else
	begin
	  l, r = other.coerce(self)
	  return l <=> r
	rescue NoMethodError
	end
  end
  nil
end

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# File 'lib/date.rb', line 23

def abs() self.class.new end

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# File 'lib/date.rb', line 42

def coerce(other)
  case other
  when Numeric; return -d, d
  else
	super
  end
end

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# File 'lib/date.rb', line 19

def finite? () false end

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# File 'lib/date.rb', line 20

def infinite? () d.nonzero? end

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# File 'lib/date.rb', line 21

def nan? () d.zero? end

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# File 'lib/date.rb', line 50

def to_f
  return 0 if @d == 0
  if @d > 0
	Float::INFINITY
  else
	-Float::INFINITY
  end
end

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# File 'lib/date.rb', line 18

def zero? () false end