tidypolars 0.8.0

tidypolars requires polars >= 0.17.0.

Breaking changes

• As announced in tidypolars 0.7.0, the behavior of collect() has changed.
  It now returns a standard R data.frame and not a Polars DataFrame anymore.
  Replace collect() by compute() (with the same arguments) to keep the old
  behavior.

• In bind_rows_polars(), if .id is passed, the resulting column now is of
  type character instead of integer.

New features

• Add support for several functions:

  • from package base: all(), any(), diff(), ISOdatetime(),
    length(), rev(), unique().

  • from package dplyr: consecutive_id(), min_rank(), na_if(),
    n_distinct(), nth().

  • from package lubridate: make_datetime().

  • from package stringr: str_dup(), str_split(), str_split_i(),
    str_trunc().

  • from package tidyr: replace_na() (the data.frame method was already
    translated but not the vector one that can be used in mutate() for example).

• It is now possible to use explicit namespaces (such as dplyr::first() instead
  of first()) in mutate(), summarize() and filter() (#114).

• In bind_rows_polars(), if all elements are named and .id is specified, the
  .id column will use the names of the elements (#116).

• It is now possible to rename variables in select() (#117).

• Add support for argument na_matches in all join functions (except
  cross_join() that doesn't need it) (#109).

Bug fixes

• Local variables in custom functions could not be used in tidypolars functions
  (reported in a blog post of Art Steinmetz). This is now fixed.

• across() now works when .cols contains only one variable and .fns contains
  only one function.

• In across(), the .cols argument now takes into account variables created
  in the same mutate() or summarize() call before across().

  as_polars_df(mtcars) |> 
    head(n = 3) |> 
    mutate(
      foo = 1, 
      across(.cols = contains("oo"), \(x) x - 1)
    )
  
  shape: (3, 12)
  ┌──────┬─────┬───────┬───────┬───┬─────┬──────┬──────┬─────┐
  │ mpg  ┆ cyl ┆ disp  ┆ hp    ┆ … ┆ am  ┆ gear ┆ carb ┆ foo │
  │ ---  ┆ --- ┆ ---   ┆ ---   ┆   ┆ --- ┆ ---  ┆ ---  ┆ --- │
  │ f64  ┆ f64 ┆ f64   ┆ f64   ┆   ┆ f64 ┆ f64  ┆ f64  ┆ f64 │
  ╞══════╪═════╪═══════╪═══════╪═══╪═════╪══════╪══════╪═════╡
  │ 21.0 ┆ 6.0 ┆ 160.0 ┆ 110.0 ┆ … ┆ 1.0 ┆ 4.0  ┆ 4.0  ┆ 0.0 │
  │ 21.0 ┆ 6.0 ┆ 160.0 ┆ 110.0 ┆ … ┆ 1.0 ┆ 4.0  ┆ 4.0  ┆ 0.0 │
  │ 22.8 ┆ 4.0 ┆ 108.0 ┆ 93.0  ┆ … ┆ 1.0 ┆ 4.0  ┆ 1.0  ┆ 0.0 │
  └──────┴─────┴───────┴───────┴───┴─────┴──────┴──────┴─────┘

  Note that the where() function is not supported here. For example:

  as_polars_df(mtcars) |> 
    mutate(
      foo = 1, 
      across(.cols = where(is.numeric), \(x) x - 1)
    )

  will not return 0 for the variable foo. A warning is emitted about this
  behavior.

• Better handling of negative values in c() when called in mutate() and
  summarize().