tryReduce method

Result<T?, E> tryReduce(
  1. T f(
    1. T,
    2. T
    )
)

Reduces the elements to a single one by repeatedly applying a reducing operation. If a Err is encountered it is returned.

Implementation

Result<T?, E> tryReduce(T Function(T, T) f) {
  if (!moveNext()) {
    return Ok(null);
  }
  var accumRes = current;
  if (accumRes.isErr()) {
    return accumRes.intoUnchecked();
  }
  var accum = accumRes.unwrap();
  while (moveNext()) {
    if (current.isErr()) {
      return current.intoUnchecked();
    }
    accum = f(accum, current.unwrap());
  }
  return Ok(accum);
}