all method

bool all(
  1. bool predicate(
    1. T pred
    )?
)

Returns true if all elements match the given predicate. Example: 5, 19, 2.all(isEven), isFalse) 6, 12, 2.all(isEven), isTrue)

Implementation

bool all(bool predicate(T pred)?) {
  for (var e in this) {
    if (!predicate!(e)) return false;
  }
  return true;
}