Sha256: 409a1da7d7aadb0ff25b9b707a6c6d0140b937c908989c937c4b98d5fabe9136
Contents?: true
Size: 1.16 KB
Versions: 396
Compression:
Stored size: 1.16 KB
Contents
struct NumberSeries {
enum NumberSeriesError: Error {
case invalidCharacter
case spanLongerThanStringLength
case negativeSpan
}
let numbers: [Int]
init(_ numberString: String) throws {
self.numbers = try numberString.characters.map {
guard let intValue = Int(String($0)) else {
throw NumberSeriesError.invalidCharacter
}
return intValue
}
}
func largestProduct(_ numberOfDigits: Int) throws -> Int {
guard numberOfDigits >= 0 else {
throw NumberSeriesError.negativeSpan
}
let endIndex = numbers.count - numberOfDigits
guard endIndex >= 0 else {
throw NumberSeriesError.spanLongerThanStringLength
}
var result = 0
for startIndex in 0 ... endIndex {
let selectedNumbers = numbers[startIndex ..< startIndex + numberOfDigits]
var total = 1
for selectedNumber in selectedNumbers {
total *= selectedNumber
}
if total > result {
result = total
}
}
return result
}
}
Version data entries
396 entries across 396 versions & 1 rubygems