jorisvandenbossche commented on PR #39264:
URL: https://github.com/apache/arrow/pull/39264#issuecomment-1881433529
And then R seems to have the same behaviour as Python (`sub` only replaces
the first occurrence):
```R
> sub("test", "t", "z")
[1] "z"
> sub("t", "z", "test")
[1] "zest"
> sub("", "z", "test")
[1] "ztest"
> gsub("t", "z", "test")
[1] "zesz"
> gsub("", "z", "test")
[1] "ztzezsztz"
```
And the tidyverse version of this function raises an error:
```R
> library(stringr)
> str_replace("test", "t", "z")
[1] "zest"
> str_replace("test", "", "z")
Error in `str_replace()`:
! `pattern` can't be the empty string (`""`).
```
So we already have examples of three different behaviours .. (replace
(insert) every other string, replace nothing, error)
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