first property

set first (E valueToSet)

The first element of the list.

The list must be non-empty when accessing its first element.

The first element of a list can be modified, unlike an Iterable. A list.first is equivalent to list[0], both for getting and setting the value.

final numbers = <int>[1, 2, 3];
print(numbers.first); // 1
numbers.first = 10;
print(numbers.first); // 10
numbers.clear();
numbers.first; // Throws.

Implementation

set first(E valueToSet) {
  if (value == null) return;
  update((_) => value?.first = valueToSet);
}