paleolimbot commented on issue #14476:
URL: https://github.com/apache/arrow/issues/14476#issuecomment-1292812367
We really should have an easy `StructArray$create()`. We have a binding for
this in dplyr, which allows a workaround until we add this properly!
``` r
library(arrow, warn.conflicts = FALSE)
make_struct <- function(...) {
args <- rlang::enquos(..., .named = TRUE)
syms <- rlang::set_names(rlang::syms(names(args)), names(args))
table <- arrow_table(tibble::tibble(!!! args)) |>
dplyr::transmute(tibble::tibble(!!! syms)) |>
dplyr::compute()
as_arrow_array(table[[1]])
}
make_struct(a = 1:5, b = letters[1:5])
#> StructArray
#> <struct<a: int32, b: string>>
#> -- is_valid: all not null
#> -- child 0 type: int32
#> [
#> 1,
#> 2,
#> 3,
#> 4,
#> 5
#> ]
#> -- child 1 type: string
#> [
#> "a",
#> "b",
#> "c",
#> "d",
#> "e"
#> ]
```
<sup>Created on 2022-10-26 with [reprex
v2.0.2](https://reprex.tidyverse.org)</sup>
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