4th December - Advent of Code 2020 - swift

december04_1.swift

var validPassportsCount = 0
let keys: [String] = [
    "ecl",
    "pid",
    "eyr",
    "hcl",
    "byr",
    "iyr",
    "hgt"
]
for p in passports {
    var validKeyCount = 0
    if p.count >= 7 {
        for line in p {
            let keyValue = line.components(separatedBy: [":"])
            let key = keyValue[0]
            if keys.contains(key) {
                validKeyCount += 1
            }
        }
    }
    if validKeyCount == 7 {
        validPassportsCount += 1
    }
}
print(validPassportsCount)

december04_2.swift

let eclValues = [
    "amb", "blu", "brn", "gry", "grn", "hzl", "oth"]
let colorValues = [
    "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"]
var validPassportsCount = 0
let keys: [String: (String) -> Bool] = [
    "ecl": { value in
        eclValues.contains(value)
    },
    "pid": { value in
        value.count == 9 && Int(value) != nil
    },
    "eyr": { value in
        value.count == 4 && Int(value) != nil && Int(value)! >= 2020 && Int(value)! <= 2030
    },
    "hcl": { value in
        let a = Array(value)
        if a[0] != "#" && a.count != 7 {
            return false
        }
        for i in 1...6 {
            if !colorValues.contains(String(a[i])) {
                return false
            }
        }
        return true
    },
    "byr": { value in
        value.count == 4 && Int(value) != nil && Int(value)! >= 1920 && Int(value)! <= 2002
    },
    "iyr": { value in
        value.count == 4 && Int(value) != nil && Int(value)! >= 2010 && Int(value)! <= 2020
    },
    "hgt": { value in
        let letters = Array(String(value))

        if letters.count == 4 {
            let height = Int(String(letters[0]) + String(letters[1]))
            if height == nil {
                return false
            }
            if height! <= 76 && height! >= 59 {
                if (String(letters[2]) + String(letters[3])) == "in" {
                    return true
                }
            }
        }
        if letters.count == 5 {
            let height = Int(String(letters[0]) + String(letters[1]) + String(letters[2]))
            if height == nil {
                return false
            }
            if height! <= 193 && height! >= 150 {
                if (String(letters[3]) + String(letters[4])) == "cm" {
                    return true
                }
            }
        }
        return false
    }
]
for p in passports {
    var validKeyCount = 0
    if p.count >= 7 {
        for line in p {
            let keyValue = line.components(separatedBy: [":"])

            let valid = keys.first { (key,validationFunc) -> Bool in
                key == keyValue[0] && validationFunc(keyValue[1])
            }
            if valid != nil {
                validKeyCount += 1
            } else {
                print("invalid\(keyValue)")
            }
        }
    }
    if validKeyCount == 7 {
        validPassportsCount += 1
    }
}
print(validPassportsCount)

december04_shared.swift

let filename = "/Users/felix/xCodeProjects/AdventOfCode2020.playground/Resources/december04.txt"
let contents = try! String(contentsOfFile: filename)
let lines = contents.components(separatedBy: CharacterSet.whitespacesAndNewlines)
var passports = [[String]]()

var passport = [String]()
for line in lines {
    if line == "" {
        passports.append(passport)
        passport = [String]()
    } else {
        passport.append(String(line))
    }
}