romainfrancois opened a new pull request #7660:
URL: https://github.com/apache/arrow/pull/7660
some progress here:
``` r
library(arrow, warn.conflicts = FALSE)
a <- Array$create(vctrs::list_of(as.raw(1:4), as.raw(1:4)), type =
fixed_size_binary(4L))
a
#> Array
#> <fixed_size_binary[4]>
#> [
#> 01020304,
#> 01020304
#> ]
v <- a$as_vector()
v
#> <fixed_size_binary<4>[2]>
#> [[1]]
#> [1] 01 02 03 04
#>
#> [[2]]
#> [1] 01 02 03 04
str(v)
#> fixed_size_binary<4> [1:2]
#> $ : raw [1:4] 01 02 03 04
#> $ : raw [1:4] 01 02 03 04
# we can skip the type= we have an R object that inherits from vctrs_list_of,
# with class arrow_fixed_size_binary and a byte_width attribute
raws <- vctrs::new_list_of(
list(as.raw(1:4), as.raw(1:4)),
ptype = raw(),
byte_width = 4L,
class = "arrow_fixed_size_binary"
)
a <- Array$create(raws)
a
#> Array
#> <fixed_size_binary[4]>
#> [
#> 01020304,
#> 01020304
#> ]
v <- a$as_vector()
v
#> <fixed_size_binary<4>[2]>
#> [[1]]
#> [1] 01 02 03 04
#>
#> [[2]]
#> [1] 01 02 03 04
str(v)
#> fixed_size_binary<4> [1:2]
#> $ : raw [1:4] 01 02 03 04
#> $ : raw [1:4] 01 02 03 04
```
<sup>Created on 2020-07-07 by the [reprex
package](https://reprex.tidyverse.org) (v0.3.0.9001)</sup>
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