Class: Numeric

Inherits:
Object show all
Includes:
Comparable
Defined in:
opal/opal/corelib/numeric.rb

Direct Known Subclasses

Complex, Float, Integer, Number, Rational

Instance Method Summary collapse

Methods included from Comparable

#<, #<=, #==, #>, #>=, #between?, #clamp

Instance Method Details

#%(other) ⇒ Object Also known as: modulo


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# File 'opal/opal/corelib/numeric.rb', line 44

def %(other)
  self - other * div(other)
end

#[email protected]Object


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# File 'opal/opal/corelib/numeric.rb', line 36

def [email protected]
  self
end

#[email protected]Object


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# File 'opal/opal/corelib/numeric.rb', line 40

def [email protected]
  0 - self
end

#<=>(other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 28

def <=>(other)
  if equal? other
    return 0
  end

  nil
end

#__coerced__(method, other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 14

def __coerced__(method, other)
  if other.respond_to?(:coerce)
    a, b = other.coerce(self)
    a.__send__ method, b
  else
    case method
    when :+, :-, :*, :/, :%, :&, :|, :^, :**
      raise TypeError, "#{other.class} can't be coerced into Numeric"
    when :>, :>=, :<, :<=, :<=>
      raise ArgumentError, "comparison of #{self.class} with #{other.class} failed"
    end
  end
end

#absObject Also known as: magnitude


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# File 'opal/opal/corelib/numeric.rb', line 48

def abs
  self < 0 ? -self : self
end

#abs2Object


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# File 'opal/opal/corelib/numeric.rb', line 52

def abs2
  self * self
end

#angleObject Also known as: arg


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# File 'opal/opal/corelib/numeric.rb', line 56

def angle
  self < 0 ? Math::PI : 0
end

#ceil(ndigits = 0) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 62

def ceil(ndigits = 0)
  to_f.ceil(ndigits)
end

#clone(freeze: true) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 332

def clone(freeze: true)
  self
end

#coerce(other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 6

def coerce(other)
  if other.instance_of? self.class
    return [other, self]
  end

  [Float(other), Float(self)]
end

#conjObject Also known as: conjugate


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# File 'opal/opal/corelib/numeric.rb', line 66

def conj
  self
end

#denominatorObject


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# File 'opal/opal/corelib/numeric.rb', line 72

def denominator
  to_r.denominator
end

#div(other) ⇒ Object

Raises:


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# File 'opal/opal/corelib/numeric.rb', line 76

def div(other)
  raise ZeroDivisionError, 'divided by o' if other == 0

  (self / other).floor
end

#divmod(other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 82

def divmod(other)
  [div(other), self % other]
end

#dupObject


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# File 'opal/opal/corelib/numeric.rb', line 328

def dup
  self
end

#fdiv(other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 86

def fdiv(other)
  to_f / other
end

#finite?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 336

def finite?
  true
end

#floor(ndigits = 0) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 90

def floor(ndigits = 0)
  to_f.floor(ndigits)
end

#iObject


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# File 'opal/opal/corelib/numeric.rb', line 94

def i
  Complex(0, self)
end

#imagObject Also known as: imaginary


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# File 'opal/opal/corelib/numeric.rb', line 98

def imag
  0
end

#infinite?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 340

def infinite?
  nil
end

#integer?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 104

def integer?
  false
end

#negative?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 324

def negative?
  self < 0
end

#nonzero?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 112

def nonzero?
  zero? ? nil : self
end

#numeratorObject


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# File 'opal/opal/corelib/numeric.rb', line 116

def numerator
  to_r.numerator
end

#polarObject


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# File 'opal/opal/corelib/numeric.rb', line 122

def polar
  [abs, arg]
end

#positive?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 320

def positive?
  self > 0
end

#quo(other) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 126

def quo(other)
  Opal.coerce_to!(self, Rational, :to_r) / other
end

#realObject


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# File 'opal/opal/corelib/numeric.rb', line 130

def real
  self
end

#real?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 134

def real?
  true
end

#rectObject Also known as: rectangular


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# File 'opal/opal/corelib/numeric.rb', line 138

def rect
  [self, 0]
end

#round(digits = undefined) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 144

def round(digits = undefined)
  to_f.round(digits)
end

#step(limit = undefined, step = undefined, to: undefined, by: undefined, &block) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 148

def step(limit = undefined, step = undefined, to: undefined, by: undefined, &block)
  %x{
    if (limit !== undefined && to !== undefined) {
      #{raise ArgumentError, 'to is given twice'}
    }

    if (step !== undefined && by !== undefined) {
      #{raise ArgumentError, 'step is given twice'}
    }

    if (to !== undefined) {
      limit = to;
    }

    if (by !== undefined) {
      step = by;
    }

    if (limit === undefined) {
      limit = nil;
    }

    function validateParameters() {
      if (step === nil) {
        #{raise TypeError, 'step must be numeric'}
      }

      if (step != null && #{step == 0}) {
        #{raise ArgumentError, "step can't be 0"}
      }

      if (step === nil || step == null) {
        step = 1;
      }

      var sign = #{step <=> 0};

      if (sign === nil) {
        #{raise ArgumentError, "0 can't be coerced into #{step.class}"}
      }

      if (limit === nil || limit == null) {
        limit = sign > 0 ? #{Float::INFINITY} : #{-Float::INFINITY};
      }

      #{Opal.compare(self, limit)}
    }

    function stepFloatSize() {
      if ((step > 0 && self > limit) || (step < 0 && self < limit)) {
        return 0;
      } else if (step === Infinity || step === -Infinity) {
        return 1;
      } else {
        var abs = Math.abs, floor = Math.floor,
            err = (abs(self) + abs(limit) + abs(limit - self)) / abs(step) * #{Float::EPSILON};

        if (err === Infinity || err === -Infinity) {
          return 0;
        } else {
          if (err > 0.5) {
            err = 0.5;
          }

          return floor((limit - self) / step + err) + 1
        }
      }
    }

    function stepSize() {
      validateParameters();

      if (step === 0) {
        return Infinity;
      }

      if (step % 1 !== 0) {
        return stepFloatSize();
      } else if ((step > 0 && self > limit) || (step < 0 && self < limit)) {
        return 0;
      } else {
        var ceil = Math.ceil, abs = Math.abs,
            lhs = abs(self - limit) + 1,
            rhs = abs(step);

        return ceil(lhs / rhs);
      }
    }

  }

  return enum_for(:step, limit, step, &`stepSize`) unless block_given?

  %x{
    validateParameters();

    var isDesc = #{step.negative?},
        isInf = #{step == 0} ||
                (limit === Infinity && !isDesc) ||
                (limit === -Infinity && isDesc);

    if (self.$$is_number && step.$$is_number && limit.$$is_number) {
      if (self % 1 === 0 && (isInf || limit % 1 === 0) && step % 1 === 0) {
        var value = self;

        if (isInf) {
          for (;; value += step) {
            block(value);
          }
        } else if (isDesc) {
          for (; value >= limit; value += step) {
            block(value);
          }
        } else {
          for (; value <= limit; value += step) {
            block(value);
          }
        }

        return self;
      } else {
        var begin = #{to_f}.valueOf();
        step = #{step.to_f}.valueOf();
        limit = #{limit.to_f}.valueOf();

        var n = stepFloatSize();

        if (!isFinite(step)) {
          if (n !== 0) block(begin);
        } else if (step === 0) {
          while (true) {
            block(begin);
          }
        } else {
          for (var i = 0; i < n; i++) {
            var d = i * step + self;
            if (step >= 0 ? limit < d : limit > d) {
              d = limit;
            }
            block(d);
          }
        }

        return self;
      }
    }
  }

  counter = self

  while `isDesc ? #{counter >= limit} : #{counter <= limit}`
    yield counter
    counter += step
  end
end

#to_cObject


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# File 'opal/opal/corelib/numeric.rb', line 304

def to_c
  Complex(self, 0)
end

#to_intObject


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# File 'opal/opal/corelib/numeric.rb', line 308

def to_int
  to_i
end

#truncate(ndigits = 0) ⇒ Object


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# File 'opal/opal/corelib/numeric.rb', line 312

def truncate(ndigits = 0)
  to_f.truncate(ndigits)
end

#zero?Boolean

Returns:


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# File 'opal/opal/corelib/numeric.rb', line 316

def zero?
  self == 0
end