ianmcook commented on a change in pull request #9745:
URL: https://github.com/apache/arrow/pull/9745#discussion_r597976995
##########
File path: r/tests/testthat/helper-data.R
##########
@@ -134,3 +134,17 @@ example_with_logical_factors <- tibble::tibble(
"hey buddy"
)
)
+
+# the values in each column of this tibble are in ascending order in the C
locale.
+# there are some ties, but sorting by any two columns will give a
deterministic order.
+example_data_for_sorting <- tibble::tibble(
+ int = c(-.Machine$integer.max, -101L, -100L, 0L, 0L, 1L, 100L, 1000L,
.Machine$integer.max, NA_integer_),
+ dbl = c(-Inf, -.Machine$double.xmax, -.Machine$double.xmin, 0,
.Machine$double.xmin, pi, .Machine$double.xmax, Inf, NaN, NA_real_),
+ # R string collation varies by locale, while libarrow always uses the C
locale for string collation
+ # (in other words: string values in libarrow are ordered lexicographically
as bytestrings)
+ # to make R sort functions use the C locale, run Sys.setlocale("LC_COLLATE",
"C")
Review comment:
Does it? I don't know
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
