edponce edited a comment on pull request #11232:
URL: https://github.com/apache/arrow/pull/11232#issuecomment-930574971
Interesting...the failed tests are because `stringr` behavior for
`str_to_title()` is different from Python's `title()` when string begins with
an integer. The C++ implementation follows Python's behavior.
```c++
# R stringr
> str_to_title("1Foo1") # "1foo1"
# Python
>>> "1Foo1".title() # "1Foo1"
```
I conclude that this also applies for "is_title()" function because it
ignores beginning integers...well...`stringr` does not has an `is_title()`
function.
What to do in such a case? cc @jonkeane @nealrichardson
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