paleolimbot opened a new pull request, #692:
URL: https://github.com/apache/arrow-nanoarrow/pull/692
Still needs some testing on the stream case, and is unfortunately not very
zero copy; however, gets the job done (and I think fixes some cases where we
would have otherwise silently handled a matrix as the storage type).
Inspired by #691!
``` r
library(nanoarrow)
df <- data.frame(x = 1:10)
df$matrix_col <- matrix(letters[1:20], ncol = 2, byrow = TRUE)
array <- as_nanoarrow_array(df)
# Default comes back as list_of(character())
convert_array(array) |> tibble::as_tibble()
#> # A tibble: 10 × 2
#> x matrix_col
#> <int> <list<chr>>
#> 1 1 [2]
#> 2 2 [2]
#> 3 3 [2]
#> 4 4 [2]
#> 5 5 [2]
#> 6 6 [2]
#> 7 7 [2]
#> 8 8 [2]
#> 9 9 [2]
#> 10 10 [2]
# But can specify matrix
convert_array(
array,
tibble::tibble(x = integer(), matrix_col = matrix(character(), ncol = 2))
)
#> # A tibble: 10 × 2
#> x matrix_col[,1] [,2]
#> <int> <chr> <chr>
#> 1 1 a b
#> 2 2 c d
#> 3 3 e f
#> 4 4 g h
#> 5 5 i j
#> 6 6 k l
#> 7 7 m n
#> 8 8 o p
#> 9 9 q r
#> 10 10 s t
```
<sup>Created on 2024-12-12 with [reprex
v2.1.1](https://reprex.tidyverse.org)</sup>
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