枚举和switch语句来映射字符串数组斯威夫特4

问题描述 投票:0回答:1

我使用的枚举和switch语句,企图字母组合映射到数字的字符串给予。这类似于电话词算法,其中给你一个电话号码,必须找到该号码映射可能的话。在这里,我并不想找到实际的英语单词,一定是。而是相反,信件只是基本String

下面的代码是不是在操场出于某种原因打印。

enum Dialpad : Int {
  case zero, one, two, three, four

  var letters : [String] {
    switch self {
    case .zero,.one:
      return []
    case .two:
      return ["a","b","c"]
    case .three:
      return ["d","e","f"]
    case .four:
      return ["g","h","i"]
    }
  }
}

这里是结合Character阵列到阵列String递归函数。

func comboArray(_ arrays:[[String]], n:Int,set:inout Set<String>) {
  if n >= arrays.count { return }
  let array = arrays[n]
  if set.isEmpty {
    set = Set(array)
  } else {
    set.forEach { (c1) in
      array.forEach({ (c2) in
        set.insert(c1+c2)
      })
      if !array.isEmpty {
        set.remove(c1)
      }
    }
  }
  comboArray(arrays, n: n+1, set: &set)
}

这个功能应该在一些并将其映射到相应的拨号盘字母。

func dialPadLetters(number:Int) -> Set<String> {
  let stringNumber = String(number)
  var arrayLetter : [Array<String>] = []
  for c in stringNumber {
    let n = Int(String(c))!
    let letters = Dialpad(rawValue: n)!.letters
    arrayLetter.append(letters)
  }
  var mySet : Set<String> = []
  comboArray(arrayLetter, n: 0, set: &mySet)
  return mySet
}

然后,我尝试打印的字母a,b,C,d,E,F,G,H的可能的组合,我因为给定的拨号盘号码是0,1,2,3,4。(注意,0和1不包含拨号盘字母。)

let theSet = dialPadLetters(number: 1234)

print("\(theSet)")
algorithm enums switch-statement swift4
1个回答
0
投票

看来你的游乐场坏了,因为你的代码对我的作品和版画["adh", "bdg", "afi", "bdi", "beh", "bdh", "bfg", "adg", "bfi", "aeh", "cdi", "aeg", "bfh", "cfi", "afg", "cfg", "aei", "afh", "bei", "ceg", "cdh", "cei", "adi", "cdg", "ceh", "cfh", "beg"]

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