Ad
victorurielpvs.0xLeif

Add a given separator to a string at every n characters

Code
Diff
  • extension String {
  func insert(_ value: String, n: Int) -> String {
    guard n > 0 else { return self }
    
    var result: String = ""
    
    stride(from: 0, to: self.count, by: n).forEach { i in
      let startIndex = self.index(self.startIndex, offsetBy: i)
      let endIndex = self.index(startIndex, offsetBy: n, limitedBy: self.endIndex) ?? self.endIndex
      result += (result.isEmpty ? "" : value) + self[startIndex..<endIndex]
    }
    
    return result
  }
}
    • extension String {
    • func insert(_ value: String, n: Int) -> String {
    • guard n > 0 else {
    • return self
    • }
    • var ndx = 0
    • return self.reduce("") { (string, c) in
    • guard ndx < n else {
    • ndx = 1
    • return "\(string)\(value)\(c)"
    • }
    • ndx += 1
    • return "\(string)\(c)"
    • guard n > 0 else { return self }
    • var result: String = ""
    • stride(from: 0, to: self.count, by: n).forEach { i in
    • let startIndex = self.index(self.startIndex, offsetBy: i)
    • let endIndex = self.index(startIndex, offsetBy: n, limitedBy: self.endIndex) ?? self.endIndex
    • result += (result.isEmpty ? "" : value) + self[startIndex..<endIndex]
    • }
    • return result
    • }
    • }