description

# takeWhile method Null safety

Iterable<E> takeWhile (

1. bool test(
   1. E element
   )

)
override

Returns a lazy iterable of the leading elements satisfying `test`.

The filtering happens lazily. Every new iterator of the returned iterable starts iterating over the elements of `this`.

The elements can be computed by stepping through iterator until an element is found where `test(element)` is false. At that point, the returned iterable stops (its `moveNext()` returns false).

## Implementation

    Iterable<E> takeWhile(bool test(E element)) {
      return TakeWhileIterable<E>(this, test);
    }