Class: Float

Inherits:
Object show all
Defined in:
lib/backports/2.4.0/float/dup.rb,
lib/backports/1.9.1/float/round.rb,
lib/backports/2.2.0/float/next_float.rb,
lib/backports/2.2.0/float/prev_float.rb

Constant Summary collapse

INFINITY = 
1.0/0.0
NAN = 
0.0/0.0

Instance Method Summary collapse

Instance Method Details

#dup ⇒ Object 



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# File 'lib/backports/2.4.0/float/dup.rb', line 2

def dup
  self
end

#next_float ⇒ Object 



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# File 'lib/backports/2.2.0/float/next_float.rb', line 5

def next_float
  return Float::INFINITY if self == Float::INFINITY
  r = Backports.integer_to_float(Backports.float_to_integer(self) + 1)
  r == 0 ? -0.0 : r # Map +0.0 to -0.0
end

#prev_float ⇒ Object 



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# File 'lib/backports/2.2.0/float/prev_float.rb', line 6

def prev_float
  return -Float::INFINITY if self == -Float::INFINITY
  Backports.integer_to_float(Backports.float_to_integer(self) - 1)
end

#round_with_digits(ndigits = 0) ⇒ Object 



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# File 'lib/backports/1.9.1/float/round.rb', line 6

def round_with_digits(ndigits=0)
  ndigits = Backports::coerce_to_int(ndigits)
  case
  when ndigits == 0
    round_without_digits
  when ndigits < 0
    p = 10 ** -ndigits
    p > abs ? 0 : (self / p).round * p
  else
    p = 10 ** ndigits
    prod = self * p
    prod.infinite? || prod.nan? ? self : prod.round.to_f / p
  end
end