Returns an iterator over the first `prefix_len` bytes of each array element, including null values. If `prefix_len` is larger than the element's length, the iterator will return an empty slice (`&[]`).
(&self, prefix_len: usize)
| 387 | /// If `prefix_len` is larger than the element's length, the iterator will |
| 388 | /// return an empty slice (`&[]`). |
| 389 | pub fn prefix_bytes_iter(&self, prefix_len: usize) -> impl Iterator<Item = &[u8]> { |
| 390 | self.views().into_iter().map(move |v| { |
| 391 | let len = (*v as u32) as usize; |
| 392 | |
| 393 | if len < prefix_len { |
| 394 | return &[] as &[u8]; |
| 395 | } |
| 396 | |
| 397 | if prefix_len <= 4 || len as u32 <= MAX_INLINE_VIEW_LEN { |
| 398 | unsafe { StringViewArray::inline_value(v, prefix_len) } |
| 399 | } else { |
| 400 | let view = ByteView::from(*v); |
| 401 | let data = unsafe { |
| 402 | self.data_buffers() |
| 403 | .get_unchecked(view.buffer_index as usize) |
| 404 | }; |
| 405 | let offset = view.offset as usize; |
| 406 | unsafe { data.get_unchecked(offset..offset + prefix_len) } |
| 407 | } |
| 408 | }) |
| 409 | } |
| 410 | |
| 411 | /// Returns an iterator over the last `suffix_len` bytes of each array |
| 412 | /// element, including null values. |
no test coverage detected