description

# writeIterable<T> method Null safety

void writeIterable <T>(

1. List<T> target,
2. int at,
3. Iterable<T> source

)

Write the elements of an iterable into a list.

This is a utility function that can be used to implement methods like setAll.

The elements of `source` are written into `target` from position `at`. The `source` must not contain more elements after writing the last position of `target`.

If the source is a list, the copyRange function is likely to be more efficient.

## Implementation

    static void writeIterable<T>(List<T> target, int at, Iterable<T> source) {
      RangeError.checkValueInInterval(at, 0, target.length, "at");
      int index = at;
      int targetLength = target.length;
      for (var element in source) {
        if (index == targetLength) {
          throw IndexError(targetLength, target);
        }
        target[index] = element;
        index++;
      }
    }