v0.9.0

BREAKING CHANGES DUE TO RUST-POLARS UPDATE

• rust-polars is updated to 0.33.2 (#417)
  • In all date-time related methods, the argument use_earliest is replaced by ambiguous.
  • In $sample() and $shuffle(), the argument fixed_seed is removed.
  • In $value_counts(), the arguments multithreaded and sort
    (sometimes called sorted) have been swapped and renamed sort and parallel.
  • $str$count_match() gains a literal argument.
  • $arg_min() doesn't consider NA as the minimum anymore (this was already the behavior of $min()).
  • Using $is_in() with NA on both sides now returns NA and not TRUE anymore.
  • Argument pattern of $str$count_matches() can now use expressions.
  • Needs Rust toolchain nightly-2023-08-26 for to build with full features.
• Rename R functions to match rust-polars
  • $str$count_match() -> $str$count_matches() (#417)
  • $str$strip() -> $str$strip_chars() (#417)
  • $str$lstrip() -> $str$strip_chars_start() (#417)
  • $str$rstrip() -> $str$strip_chars_end() (#417)
  • $groupby() is renamed $group_by(). (#427)

Breaking changes

• Remove some deprecated methods.
  • Method $with_column() has been removed (it was deprecated since 0.8.0).
    Use $with_columns() instead (#402).
  • Subnamespace $arr has been removed (it was deprecated since 0.8.1).
    Use $list instead (#402).
• Setting and getting polars options is now made with pl$options,
  pl$set_options() and pl$reset_options() (#384).

What's changed

• Bump supported R version to 4.2 or later (#435).
• pl$concat() now also supports Series, Expr and LazyFrame (#407).
• New method $unnest() for LazyFrame (#397).
• New method $sample() for DataFrame (#399).
• New method $meta$tree_format() to display an Expr as a tree (#401).
• New argument schema in pl$DataFrame() and pl$LazyFrame() to override the
  automatic type detection (#385).
• Fix bug when calling R from polars via e.g. $map() where query would not
  complete in one edge case (#409).
• New method $cat$get_categories() to list unique values of categorical
  variables (#412).
• New methods $fold() and $reduce() to apply an R function rowwise (#403).
• New function pl$raw_list and class rpolars_raw_list a list of R Raw's, where missing is
  encoded as NULL to aid conversion to polars binary Series. Support back and forth conversion
  from polars binary literal and Series to R raw (#417).
• New method $write_csv() for DataFrame (#414).
• New method $sink_csv() for LazyFrame (#432).
• New method $dt$time() to extract the time from a datetime variable (#428).
• Method $profile() gains optimization arguments and plot-related arguments (#429).
• New method pl$read_parquet() that is a shortcut for pl$scan_parquet()$collect() (#434).
• Rename $str$str_explode() to $str$explode() (#436).
• New method $transpose() for DataFrame (#440).
• New argument eager of LazyFrame$set_optimization_toggle() (#439).
• {polars} can now be installed with "R source package with Rust library binary",
  by a mechanism copied from the prqlr package.

  Sys.setenv(NOT_CRAN = "true")
  install.packages("polars", repos = "https://rpolars.r-universe.dev")

  The URL and SHA256 hash of the available binaries are recorded in tools/lib-sums.tsv.
  (#435, #448, #450, #451)