Given a number, find the next higher number that uses the same set of digits. For instance, given the number 38276, the next higher number that uses the digits 2 3 6 7 8 is 38627.

next_permutation.rb

def next_permutation(value)
	values = value.to_s(10).split(//).sort
	newValue = value + 1

	while false == newValue.to_s(10).split(//).sort.eql?(values)
		newValue = newValue + 1
	end

	return newValue
end