Class: Fixnum

Inherits:
Object
  • Object
show all
Defined in:
lib/hexa/core_ext/fixnum.rb

Instance Method Summary collapse

Instance Method Details

#factorial ⇒ Fixnum Also known as: !

Allows tou to know the factorial of self

Returns:

  • (Fixnum) —

    factorial of self



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# File 'lib/hexa/core_ext/fixnum.rb', line 5

def factorial
	if self == 1 or self == 0
		return 1
	else
		return self * (self - 1).factorial
	end
end

#inverse ⇒ Float Also known as: reverse

Returns inverse of self.

Returns:

  • (Float) —

    inverse of self



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# File 'lib/hexa/core_ext/fixnum.rb', line 45

def inverse
	if self == 0
		return 0
	else
		return 1 / self
	end
end

#opposite ⇒ Fixnum

Returns the opposite of self.

Returns:

  • (Fixnum) —

    the opposite of self



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# File 'lib/hexa/core_ext/fixnum.rb', line 40

def opposite
	- self
end

#prime? ⇒ Boolean

Predicate method which allows you to know if the number is a prime number

Returns:

  • (Boolean) 


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# File 'lib/hexa/core_ext/fixnum.rb', line 22

def prime?
	if self < 2
		false
	elsif self == 2
		true
	elsif self % 2 == 0
		false
	else
		i = 3
		while i*i <= self
			return false if self % i == 0
			i += 2
		end
		return true
	end
end

#sqrt ⇒ Float

Returns the square root of self.

Returns:

  • (Float) —

    the square root of self



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# File 'lib/hexa/core_ext/fixnum.rb', line 16

def sqrt
	Math.sqrt(self)
end