[jira] [Created] (ARROW-12737) [R] Add function concat_arrays() that converts ChunkedArray to Array

["Ian Cook (Jira)" <ji...@apache.org>]

Ian Cook created ARROW-12737:
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             Summary: [R] Add function concat_arrays() that converts ChunkedArray to Array
                 Key: ARROW-12737
                 URL: https://issues.apache.org/jira/browse/ARROW-12737
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Ian Cook


Add a new exported function {{concat_arrays()}} that turns a {{ChunkedArray}} into an {{Array}}. See the PyArrow function [{{concat_arrays}}|https://arrow.apache.org/docs/python/generated/pyarrow.concat_arrays.html] for examples of how this should work. 

Also add a new R6 method {{combine_chunks()}} to the {{ChunkedArray}} class that works like the PyArrow [{{ChunkedArray.combine_chunks}}|https://arrow.apache.org/docs/python/generated/pyarrow.ChunkedArray.html#pyarrow.ChunkedArray.combine_chunks] method (but probably without the MemoryPool stuff).

Note that there is an example in the "Apache Arrow in Python and R with reticulate" vignette ({{vignettes/Python.rmd}}) the premise of which is that the R package lacks a {{concat_arrays}} function so we should also change this if we can come up with another good example.



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