A dart package for pattern matching.

var x = 2;
var result = match(
  x,
  {
    1: () => "Its a one",
    () => x == 2 || x == 3: () => "Its a $x",
  },
  "Error!!", // (Optional) default value in case nothing is matched
);

// Output
$ "Its a 2"

U match<T, U>(
  T value, // Value that needs to be matched
  Map<T, U Function()> fns, // T -> Any primitive values or a function that returns true or false
  U defaultValue, // Optional value that is returned when nothing is matched
)