Method first

util/generic/array_ref.h:180–183

* Obtains a ref that is a view over the first `count` elements of this TArrayRef. * * The behavior is undefined if count > size(). */

     * The behavior is undefined if count > size().
     */
    TArrayRef first(size_t count) const {
        Y_ASSERT(count <= size());
        return TArrayRef(data(), count);
    }

    /**
     * Obtains a ref that is a view over the last `count` elements of this TArrayRef.