frail dew
||```swift
let speltNumbersStrings = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
extension Substring {
var wholeNumberValue: Int? {
if let index = speltNumbersStrings.firstIndex(of: String(self)) {
return index + 1
} else {
return nil
}
}
}
extension AdventOfCode.Day1 {
struct Part2: ParsableCommand {
static let configuration = CommandConfiguration(
abstract: "Part 2: With spelt numbers"
)
@OptionGroup var options: AdventOfCode.Options
mutating func run() {
let input = options.input
let lines = input.components(separatedBy: .newlines)
var combinedNumbers: [Int] = []
for var line in lines {
for (index, speltNumberString) in speltNumbersStrings.enumerated() {
line = line.replacingOccurrences(of: speltNumberString, with: String("\(speltNumberString.first!)\(index + 1)\(speltNumberString.last!)"))
}
let numbers = line.compactMap { $0.wholeNumberValue }
guard let first = numbers.first, let last = numbers.last else {
continue
}
let lineCombinedNumbers = Int("\(first)\(last)")!
combinedNumbers.append(lineCombinedNumbers)
}
let sum = combinedNumbers.reduce(0, +)
print(sum)
}
}
}
grave vortex
violet crow
winter gust
shell roost