# firstWhere method

E firstWhere (bool test(E value), { E orElse() })
override

Returns the first element that satisfies the given predicate `test`.

Iterates through elements and returns the first to satisfy `test`.

If no element satisfies `test`, the result of invoking the `orElse` function is returned. If `orElse` is omitted, it defaults to throwing a StateError.

## Implementation

    E firstWhere(bool test(E value), {E orElse()}) {
      for (E element in this) {
        if (test(element)) return element;
      }
      if (orElse != null) return orElse();
      throw IterableElementError.noElement();
    }