Same Binary Ones

gistfile1.swift

func sameNumberOfBinaryOnes(number: Int) -> (Int, Int)? {
	let binary = 2
	let numberBinary = String(number, radix: binary)
	var pairedBinaries: (first: Int, second: Int)? = nil

	for matchingNumber in stride(from: number, through: 0, by: -1) {
		let matchingNumberBinary = String(matchingNumber, radix: binary)
		if matchingNumberBinary == numberBinary {
			pairedBinaries?.first = matchingNumber
			break
		}
	}

	for secondMatchingNumber in stride(from: number, through: number * number, by: 1) {
		let matchingNumberBinary = String(secondMatchingNumber, radix: binary)
		if matchingNumberBinary == numberBinary {
			pairedBinaries?.second = secondMatchingNumber
			break
		}
	}
	return pairedBinaries
}