romainfrancois opened a new pull request #11402:
URL: https://github.com/apache/arrow/pull/11402


   draft pull request, on top of #11369 
   
   encouraging: 
   
   ``` r
   library(arrow, warn.conflicts = FALSE)
   #> See arrow_info() for available features
   
   f <- Array$create(iris$Species)$as_vector()
   .Internal(inspect(f))
   #> @7fe3c95c3860 13 INTSXP g0c0 [OBJ,REF(65535),ATT] 
arrow::ChunkedArray<0x7fe3c75fffc8, dictionary<values=string, indices=int8, 
ordered=0>, 1 chunks, 0 nulls> len=150
   #> ATTRIB:
   #>   @7fe3c95c3518 02 LISTSXP g0c0 [REF(1)] 
   #>     TAG: @7fe3be80d5e0 01 SYMSXP g1c0 [MARK,REF(65535),LCK,gp=0x4000] 
"levels" (has value)
   #>     @7fe3c95c3550 16 STRSXP g0c0 [REF(65535)] 
arrow::ChunkedArray<0x7fe3c75e92c8, string, 1 chunks, 0 nulls> len=3
   #>     TAG: @7fe3be80d9d0 01 SYMSXP g1c0 [MARK,REF(46357),LCK,gp=0x6000] 
"class" (has value)
   #>     @7fe3ca3eefc0 16 STRSXP g0c1 [REF(1)] (len=1, tl=0)
   #>       @7fe3be88d3e8 09 CHARSXP g1c1 [MARK,REF(383),gp=0x61] [ASCII] 
[cached] "factor"
   f
   #>   [1] setosa     setosa     setosa     setosa     setosa     setosa    
   #>   [7] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [13] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [19] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [25] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [31] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [37] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [43] setosa     setosa     setosa     setosa     setosa     setosa    
   #>  [49] setosa     setosa     versicolor versicolor versicolor versicolor
   #>  [55] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [61] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [67] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [73] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [79] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [85] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [91] versicolor versicolor versicolor versicolor versicolor versicolor
   #>  [97] versicolor versicolor versicolor versicolor virginica  virginica 
   #> [103] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [109] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [115] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [121] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [127] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [133] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [139] virginica  virginica  virginica  virginica  virginica  virginica 
   #> [145] virginica  virginica  virginica  virginica  virginica  virginica 
   #> Levels: setosa versicolor virginica
   .Internal(inspect(f))
   #> @7fe3c95c3860 13 INTSXP g0c0 [OBJ,REF(65535),ATT] 
arrow::ChunkedArray<0x7fe3c75fffc8, dictionary<values=string, indices=int8, 
ordered=0>, 1 chunks, 0 nulls> len=150
   #> ATTRIB:
   #>   @7fe3c95c3518 02 LISTSXP g0c0 [REF(1)] 
   #>     TAG: @7fe3be80d5e0 01 SYMSXP g1c0 [MARK,REF(65535),LCK,gp=0x4000] 
"levels" (has value)
   #>     @7fe3c95c3550 16 STRSXP g0c0 [REF(65535)] 
arrow::ChunkedArray<0x7fe3c75e92c8, string, 1 chunks, 0 nulls> len=3
   #>     TAG: @7fe3be80d9d0 01 SYMSXP g1c0 [MARK,REF(46450),LCK,gp=0x6000] 
"class" (has value)
   #>     @7fe3ca3eefc0 16 STRSXP g0c1 [REF(65535)] (len=1, tl=0)
   #>       @7fe3be88d3e8 09 CHARSXP g1c1 [MARK,REF(385),gp=0x61] [ASCII] 
[cached] "factor"
   identical(f, iris$Species)
   #> [1] TRUE
   ```
   
   <sup>Created on 2021-10-13 by the [reprex 
package](https://reprex.tidyverse.org) (v2.0.1.9000)</sup> 


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