In Swift, how do I sort an array of strings and have strings of numbers, symbols, etc. always come after alphabetic strings?

Question

I want to sort an array of strings so that alphabetic characters are always before any other kinds of characters. For example:

[\"800\", \"word\", \"test\"]
         


        

Answer 1

How about this.

func sortedNumbersLast(words: [String]) -> [String] {
  var startsWithDigit     = [String]()
  var startsWithCharacter = [String]()

  for word in words {
    if let first = word.characters.first {
      if first >= "0" && first <= "9" {
        startsWithDigit.append(word)
      }
      else {
        startsWithCharacter.append(word)
      }
    }
  }
  return startsWithCharacter.sort(<) + startsWithDigit.sort(<)
}