self[rand(self.length)]
end
- # This method returns a random element from the array, deleting it from the
- # array itself. The method returns nil if the array is empty
+ # This method returns a given element from the array, deleting it from the
+ # array itself. The method returns nil if the element couldn't be found.
#
- def delete_one
+ # If nil is specified, a random element is returned and deleted.
+ #
+ def delete_one(val=nil)
return nil if self.empty?
- self.delete_at(rand(self.length))
+ if val.nil?
+ index = rand(self.length)
+ else
+ index = self.index(val)
+ return nil unless index
+ end
+ self.delete_at(index)
end
end