nealrichardson commented on a change in pull request #9606:
URL: https://github.com/apache/arrow/pull/9606#discussion_r589835937
##########
File path: r/tests/testthat/test-Array.R
##########
@@ -723,6 +723,17 @@ test_that("[ accepts Arrays and otherwise handles bad
input", {
)
})
+test_that("[ %in% looks up string key in dictionary", {
+ a1 <- Array$create(as.factor(c("A", "B", "C")))
+ a2 <- DictionaryArray$create(c(0L, 1L, 2L), c(4.5, 3.2, 1.1))
+ b1 <- Array$create(c(FALSE, TRUE, FALSE))
+ b2 <- Array$create(c(FALSE, FALSE, FALSE))
+ expect_equal(b1, arrow:::call_function("is_in_meta_binary", a1,
Array$create("B")))
+ expect_equal(b2, arrow:::call_function("is_in_meta_binary", a1,
Array$create("D")))
+ expect_equal(b1, arrow:::call_function("is_in_meta_binary", a2,
Array$create(3.2)))
+ expect_error(arrow:::call_function("is_in_meta_binary", a2,
Array$create("B")))
Review comment:
It should be documented along with `match_arrow()`, which as it turns
out mentions the same quirk
https://github.com/apache/arrow/blob/master/r/R/compute.R#L88
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