Creating function with variable number of arguments or parameters in Dart

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You can’t do that for now.

I don’t really know if varargs will come back – they were there some times ago but have been removed.

However it is possible to emulate varargs with Emulating functions. See the below code snippet.

typedef OnCall = dynamic Function(List arguments);

class VarargsFunction {
  VarargsFunction(this._onCall);
  
  final OnCall _onCall;

  noSuchMethod(Invocation invocation) {
    if (!invocation.isMethod || invocation.namedArguments.isNotEmpty)
      super.noSuchMethod(invocation);
    final arguments = invocation.positionalArguments;
    return _onCall(arguments);
  }
}

main() {
  final superHeroes = VarargsFunction((arguments) {
    for (final superHero in arguments) {
      print("There's no stopping ${superHero}");
    }
  }) as dynamic;
  superHeroes('UberMan', 'Exceptional Woman', 'The Hunk');
}

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