In Flutter/Dart, how to separate between alphabeth and numeric in a single string into array?-CodePudding

For example:

"X84J25" --> <dynamic>[ "X", 84, "J", 25 ]
"96KGWWA3" --> <dynamic> [ 96, "KGWWA", 3 ]
"L8273BB" --> <dynamic> [ "L", 8273, "BB" ]
"C" --> <dynamic> [ "C" ]
"92123" --> <dynamic> [ 92123 ]

This is sort of function split, but while split has a clear separator defined (like space for example), this is separated by flip flop between alphabet to numeric to alphabet again.

CodePudding user response：

Split does not really work here but you can do something like this instead using a regular expression to capture multiple matches in your string input:

void main() {
  print(weirdSplit("X84J25")); // [X, 84, J, 25]
  print(weirdSplit("X84J25").map((dynamic e) => e.runtimeType));
  // (String, int, String, int)

  print(weirdSplit("96KGWWA3")); // [96, KGWWA, 3]
  print(weirdSplit("L8273BB")); // [L, 8273, BB]
  print(weirdSplit("C")); // [C]
  print(weirdSplit("92123")); // [92123]
}

List<dynamic> weirdSplit(String input) => <dynamic>[
      ...RegExp(r'\d |\D ')
          .allMatches(input)
          .map((match) => match[0]!)
          .map((string) => int.tryParse(string) ?? string)
    ];