nealrichardson commented on a change in pull request #10765:
URL: https://github.com/apache/arrow/pull/10765#discussion_r682608301
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File path: r/vignettes/dataset.Rmd
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@@ -259,47 +270,58 @@ See $.data for the source Arrow object
")
```
-This returns instantly and shows the manipulations you've made, without
+This code returns an output instantly and shows the manipulations you've made,
without
loading data from the files. Because the evaluation of these queries is
deferred,
you can build up a query that selects down to a small subset without generating
intermediate datasets that would potentially be large.
Second, all work is pushed down to the individual data files,
and depending on the file format, chunks of data within the files. As a result,
-we can select a subset of data from a much larger dataset by collecting the
-smaller slices from each file--we don't have to load the whole dataset in
memory
-in order to slice from it.
+you can select a subset of data from a much larger dataset by collecting the
+smaller slices from each file - you don't have to load the whole dataset in
Review comment:
em-dash
```suggestion
smaller slices from each file—you don't have to load the whole dataset in
```
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