• Documentation search results are ordered, with visual cues
  indicating what their source is (core, main-distribution, etc.).
  These results are also grouped by language family (Racket, Rhombus,
  etc.). (See https://docs.racket-lang.org/search/index.html?q=second
  .)
• DrRacket offers to restore previously open files when starting,
  which can be made the default.
• In DrRacket, Picts can be saved by right-clicking.
• raco pkg introduces the uninstall command as the opposite of
  install. The remove name for this functionality is retained for
  compatibility. (See
  https://docs.racket-lang.org/pkg/cmdline.html#%28part._raco-pkg-uninstall%29
  .)
• raco pkg improves the handling of --clone and --unclone. (See
  https://docs.racket-lang.org/pkg/cmdline.html#%28part._raco-pkg-update%29
  .)
• iOS is a compilation target, distinct from macOS.
• Racket supports falling back to IPv4 during hostname resolution when
  IPv6 fails.
• Memory allocated using the ffi/unsafe library can be initially
  zeroed, using the 'zeroed-atomic and 'zeroed-atomic-interior
  flags. (See
  https://docs.racket-lang.org/foreign/foreign_pointer-funcs.html#%28idx._%28gentag._11._%28lib._scribblings%2Fforeign%2Fforeign..scrbl%29%29%29
  .)
• Many other bugs are fixed and documentation has been improved!

The following people contributed to this release:

Alec Mills, Alex Knauth, Alexander Shopov, Ashlynn Anderson, Ashton
Wiersdorf, Ben Greenman, Benjamin Yeung, Bob Burger, Bogdan Popa,
Breck Yunits, Carl Gay, Claes Wallin (韋嘉誠), CooperCorad, Crystal
Jacobs, D. Ben Knoble, Dexter Santucci, Eduardo Cavazos, Emil
Szpakowski, evelynmitchell, Greg Hendershott, Gunnar Ahlberg, Gwen
Weinholt, Idiomdrottning, Ikko Eltociear Ashimine, Jacqueline Firth,
Jarhmander, Jay McCarthy, Jens Axel Søgaard, Jimmy McNutt, jinser,
Jinser Kafka, John Clements, lukejianu, Marc Nieper-Wißkirchen,
Matej Fandl, Matthew Flatt, Matthias Felleisen, Michael Ballantyne,
Mike Sperber, olopierpa, Paul Morris, Phil Nguyen, Philip McGrath,
Robby Findler, Ronald Garcia, Ryan Culpepper, Sam Phillips, Sam
Tobin-Hochstadt, Siddhartha Kasivajhula, Sorawee Porncharoenwase,
Stephen De Gabrielle, Syntacticlosure, Taylor Allred, Tomas Fabrizio
Orsi, Wing Hei Chan, and Yafei Yang.

• 64-bit ARM Windows is one of the standard pre-built downloads.

• The compiler/demod language integrates demodularization into the
  program rather than an external tool. Using the language approach
  cooperates with other Racket tools and allows demodularization to be
  used on libraries. Additionally, demodularization handles submodules
  and can prune definitions, significantly shrinking the size of some
  programs.

• The contract-in form enables contracts to be specified in an
  importing module.

• The #%declare form supports the #:flatten-requires and
  #:unlimited-compile keywords

• Identifiers such as case-λ, match-λ and λ are equivalent to
  their Latin-alphabet equivalents (case-lambda, match-lambda, and
  lambda) in more contexts, including uses of match.

• The hash-filter function allows the use of a predicate to select a
  sub-table of a hash table.

• The module browser can perform filtering on submodules.

• The raco test command-line form respects the
  current-test-invocation-directory parameter, and shows well-formed
  module paths in its output.

• Racket CS allows the use of in-memory boot files.

• The raco/testing collection brings together a variety of testing-
  related functions and forms.

• This release also includes many bug-fixes and documentation updates!

• NOTE: This release (and version 8.13) have a known build problem that
  affects the builtpkgs source bundle on Windows. In order to avoid this
  problem, use a pre-built bundle or build using a source bundle other
  than the "builtpkgs" one. Nightly builds do not suffer from this
  problem.

The following people contributed to this release:

Alex Knauth, Alexander Shopov, Ben Greenman, Bert De Ketelaere, Bob
Burger, Bogdan Popa, Cadence Ember, Carl Gay, D. Ben Knoble, Gregory
Rosenblatt, Gustavo Massaccesi, John Clements, John Sullivan, Jordan
Johnson, luistung, Matthew Flatt, Matthias Felleisen, Noah Ma, Philip
McGrath, Robby Findler, Ryan Culpepper, Sam Tobin-Hochstadt, Sergey
Fedorov, Sorawee Porncharoenwase, Wing Hei Chan, and ZhangHao.

• The racket/treelist and racket/mutable-treelist libraries provide
  list-like containers that support many operations in effectively
  constant time, including appending and extracting sub-lists without
  mutating the given list. Treelists are implemented as RRB Vectors,
  invented by Stucki, Riompf, Ureche, and Bagwell.

(see https://docs.racket-lang.org/reference/treelist.html#(part._treelist)
and https://dl.acm.org/doi/abs/10.1145/2784731.2784739 )

• The hash-filter-keys and hash-filter-values functions allow users
  to filter hashes using a predicate on either keys or values.

(see https://docs.racket-lang.org/reference/hashtables.html#%28def._%28%28lib._racket%2Fhash..rkt%29._hash-filter-keys%29%29 )

• The vector-extend and vector*-extend functions provide a way
  to pre-populate the prefix of a newly allocated vector using the elements
  of an existing vector.

(see https://docs.racket-lang.org/reference/vectors.html#%28def._%28%28lib._racket%2Fvector..rkt%29._vector-extend%29%29 )

• Command-line raco setup, package update, and package installation use
  terminal control (when available) to show what they are working on
  more compactly and with a progress bar.

• Racket v8.13 uses Unicode 15.1 for character and string operations.

• Machine-specific cross-module optimization allows improved support for
  static generation of foreign-function bindings.

• The scribble/acmart language uses v2.01, which avoids errors
  concerning the hyperref package in some latex installations.

The following people contributed to this release:

Alec Mills, Ben Greenman, Bob Burger, Bogdan Popa, dr-neptune, Fred Fu,
Gustavo Massaccesi, Jason Hemann, Jay McCarthy, John Clements, Jordan
Johnson, Justin Dhillon, Mao Yifu, Matias Eyzaguirre, Matthew Flatt,
Matthias Felleisen, Mike Sperber, olopierpa, Oscar Waddell, Pavel
Panchekha, Philip McGrath, Robby Findler, Sam Phillips, Sam
Tobin-Hochstadt, Siddhartha Kasivajhula, Sorawee Porncharoenwase,
Stephen De Gabrielle, Tim Standen, William E. Byrd, and Wing Hei Chan.

• The "Die Macht der Abstraktion" language levels are no longer present,
  replaced by the "Schreibe dein Programm" language levels which have been
  available for several years. (see https://www.deinprogramm.de/sdp/ )

• The release fixes a problem with the binding structure of the for/fold
  form in the rare situation when an iteration clause identifier shadowed
  an accumulator identifier. This change may break code that depends on
  the old binding structure. (see https://docs.racket-lang.org/reference/for.html#%28form._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._for%2Ffold%29%29 )

• Racket automatically sets the close-on-exec flag when opening a file, on
  systems where this is available. This change lowers the cost of avoiding
  problems that can occur when file descriptors become accidentally shared
  between processes. (see https://docs.racket-lang.org/reference/file-ports.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._open-input-file%29%29 )

• Match includes hash and hash* patterns. (see https://docs.racket-lang.org/reference/match.html#%28form._%28%28lib._racket%2Fmatch..rkt%29._match%29%29 )

• The vector-set/copy function allows creation of a new vector that differs
  at only one index. This change also adds vector-append and vector-copy
  primitives. (see https://docs.racket-lang.org/reference/vectors.html#%28def._%28%28lib._racket%2Fvector..rkt%29._vector-set%2Fcopy%29%29 )

• The pregexp-quote function brings the functionality of regexp-quote
  to pregexps. (see https://docs.racket-lang.org/reference/regexp.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._pregexp-quote%29%29 )

• The C FFI convention-based converter supports PascalCase and camelCase in
  addition to an underscore-based convention. (see https://docs.racket-lang.org/foreign/Defining_Bindings.html#%28form._%28%28lib._ffi%2Funsafe%2Fdefine%2Fconventions..rkt%29._convention~3ahyphen-~3ecamel.Case%29%29 )

• The racket/case library allows case-like forms that use different
  equality comparisons, such as eq? and equal-always?. (see https://docs.racket-lang.org/reference/case.html#%28form._%28%28lib._racket%2Fcase..rkt%29._case%2Fequal%29%29 )

• Scribble rendering to HTML adds linking and information buttons when
  hovering over heading titles.

• The interval-map data structure supports iterator functions in the style
  of gen:ordered-dict. (see https://docs.racket-lang.org/data/Orders_and_Ordered_Dictionaries.html#%28def._%28%28lib._data%2Forder..rkt%29._gen~3aordered-dict%29%29 )

The following people contributed to this release:

Alex Harsányi, Alex Knauth, Alex Muscar, Alexis King, Ben Greenman, Bert
De Ketelaere, Bob Burger, Bogdan Popa, Chris Payne, Fred Fu, J. Ryan
Stinnett, Jamie Taylor, Jared Forsyth, Jarhmander, Jens Axel Søgaard,
Joel Dueck, John Clements, Jordan Johnson, Ken Harris, Laurent Orseau,
Mao Yifu, Marc Nieper-Wißkirchen, Matteo d’Addio, Matthew Flatt,
Matthias Felleisen, Micah Cantor, Mike Sperber, naveen srinivasan, Oscar
Waddell, Philip McGrath, Philippe Meunier, Robby Findler, Rocketnia, Sam
Phillips, Sam Tobin-Hochstadt, Sarthak Shah, Shu-Hung You, Sorawee
Porncharoenwase, Stephen De Gabrielle, Tom Price, ur4t, Wing Hei Chan,
and ZhangHao

Racket version 8.11.1 is now available from https://racket-lang.org/

This bug-fix release repairs a problem with building from source when using the "builtpkgs" source distribution.

Feedback Welcome

Racket version 8.11 is now available from

https://racket-lang.org/

As of this release:

• Match clauses can include a #:do option to allow evaluation of code
  and bindings before a following #:when clause. Cf. https://docs.racket-lang.org/reference/match.html#%28form._%28%28lib._racket%2Fmatch..rkt%29._match%29%29

• JSON Serialization supports indentation with an #:indent option to
  write-json. Cf. https://docs.racket-lang.org/json/index.html#%28def._%28%28lib._json%2Fmain..rkt%29._write-json%29%29

• An initiate-sequence function simplifies the creation of sequences.
  Cf. https://docs.racket-lang.org/reference/sequences.html#%28def._%28%28lib._racket%2Fsequence..rkt%29._initiate-sequence%29%29

• The :do-in form allows an inner definition sequence. Cf. https://docs.racket-lang.org/reference/for.html#%28form._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._~3ado-in%29%29

• The redex-define form allows pattern-matching in PLT Redex using a
  define-like syntax. Cf. https://docs.racket-lang.org/redex/reference.html#%28form._%28%28lib._redex%2Freduction-semantics..rkt%29._redex-define%29%29

• Racket and Chez Scheme use Robert L. Smith's "Algorithm 116" for
  division of complex numbers. Cf. https://dl.acm.org/doi/10.1145/368637.368661

• DrRacket has indentation guides that provide visual cues indicating
  how code is indented and grouped, accessible by using
  (<menu-key>-shift-i).

• "Comment-out" menu items can be specific to the #lang used by the
  current file. Cf. https://docs.racket-lang.org/framework/Text.html#%28def._%28%28lib._framework%2Fmain..rkt%29._text3aindent-guides3c253e%29%29

• Unused identifiers have a tooltip indicating that they have no bound
  occurrences.

• Quickscript includes a new form of scripting in the form of "hook"
  functions that can be attached to existing events. Cf. https://docs.racket-lang.org/quickscript/index.html#%28part._.Hooks%29

• Plots include plot-inset and plot-legend-padding parameters to
  control the amount of space left unused around the plot edge and plot
  legend. Cf. https://docs.racket-lang.org/plot/params.html#%28def._%28%28lib._plot%2Fmain..rkt%29._plot-inset%29%29

• There are many other documentation improvements, optimizations, and
  bug fixes!

Thank You

Thank you to the people who contributed to this release:

Alex Harsányi, Ben Greenman, Bogdan Popa, Cameron Moy, Camille
d’Alméras, D. Ben Knoble, Efraim Flashner, Eric S. Raymond, Fred Fu,
Greg Hendershott, Gustavo Massaccesi, Jay McCarthy, jim, Joel Dueck,
John Clements, Jon Eskin, Laurent Orseau, Lucas Sta Maria, mAdkins, Mark
Hedlund, Matteo d’Addio, Matthew Flatt, Matthias Felleisen, Mike
Sperber, Noah Ma, Oscar Waddell, Philip McGrath, Qifan Wang, Robby
Findler, Ross Angle, Ryan Culpepper, Sam Tobin-Hochstadt, shenleban
tongying, Shu-Hung You, Sorawee Porncharoenwase, Stephen De Gabrielle,
Wing Hei Chan, xxyzz, and ZhangHao

Feedback Welcome

Racket version 8.10 is now available from

https://racket-lang.org/

As of this release:

• syntax/parse no longer always compiles its patterns; this release
  includes an interpreter which is used to reduce code size

• Racket includes primitives [im]mutable-string?, [im]mutable-bytes?,
  [im]mutable-vector?, [im]mutable-box?, and [im]mutable-hash?
  (cf.
  https://docs.racket-lang.org/reference/booleans.html#%28mod-path._racket%2Fmutability%29)

• Redex adds judgment-form->rule-names (cf.
  https://docs.racket-lang.org/redex/reference.html#%28def._%28%28lib._redex%2Freduction-semantics..rkt%29._judgment-form-~3erule-names%29%29)

• Fasl and compiled code allow fxvectors and flvectors

• DrRacket allows #lang-specific customization of the definition
  navigation popdown (cf.
  https://docs.racket-lang.org/tools/drracket_language.html#%28idx._%28gentag._55._%28lib._scribblings%2Ftools%2Ftools..scrbl%29%29%29)

• Racket and DrRacket include Finnish internationalization

• Check Syntax binding arrows are drawn for names bound with
  define-local-member-name

• Many other improvements and bug fixes are included, including to
  the scribble and plot packages

Thank you

Thank you to the people who contributed to this release:

Adrien Ludwig, Alex Harsányi, Alex Knauth, Alexis King, Ben Greenman,
Cameron Moy, D. Ben Knoble, Greg Hendershott, Gustavo Massaccesi,
irreconsolable, Jay McCarthy, Joel Dueck, John Clements, Jordan Johnson,
Kamil Laskowski, Laurent Orseau, Matthew Flatt, Matthias Felleisen, Mike
Sperber, Oscar Waddell, Pavel Panchekha, Philip McGrath, reflektoin,
Robby Findler, Ryan Culpepper, Sam Tobin-Hochstadt, Shu-Hung You, Stefan
Schwarzer, Stephen De Gabrielle, and Yongming Shen

Feedback Welcome

Racket version 8.9 is now available from https://download.racket-lang.org/

As of this release:

• The HtDP student languages come with checked signatures. Programmers
  can express signatures in a formal notation, and these signatures are
  checked at run-time (in a performance-neutral manner). The addition of
  this formal language associates meaning with several names that had no
  meaning before. — This feature is experimental, and we may amend or
  retract it later. (cf.
  https://docs.racket-lang.org/htdp-langs/beginner-abbr.html?q=signatures#%28part._beginner-abbr-signatures%29)

• Switching into and out of dark mode is handled better on Mac OS and
  Linux.

• Racket uses Unicode 15.0 for character and string operations.

• The racket/hash-code library provides support for combining hash
  codes. (cf. https://docs.racket-lang.org/reference/Equality.html#%28mod-path._racket%2Fhash-code%29)

• A language module can have a configure-expand submodule that is
  dynamically required to configure a parameterization before expansion
  of another module. (cf. https://docs.racket-lang.org/reference/running-sa.html#%28part._configure-expand%29)

• stream-cons supports multiple values. (cf. https://docs.racket-lang.org/reference/streams.html#%28form._%28%28lib._racket%2Fstream..rkt%29._stream-cons%29%29)

• unit/c subcontracts may depend on bindings from any imported or
  exported signature. Additionally, bindings’ contracts are enforced
  within subcontracts, and violations blame the contract itself (like
  ->i). (cf. https://docs.racket-lang.org/reference/unitcontracts.html#%28form._%28%28lib._racket%2Funit..rkt%29._unit%2Fc%29%29)

• racket/class provides the dynamic-instantiate procedure for
  instantiating a class with a dynamic list of by-name initialization
  arguments. (cf. https://docs.racket-lang.org/reference/objcreation.html#%28def._%28%28lib._racket%2Fprivate%2Fclass-internal..rkt%29._dynamic-instantiate%29%29)

• TCP output block buffering implies TCP_NODELAY. (cf. https://docs.racket-lang.org/reference/tcp.html#%28def._%28%28lib._racket%2Ftcp..rkt%29._tcp-connect%29%29)

• Submodules and Check Syntax require arrows work better together.

• Typed Racket's shallow check generation is improved.

• Many other improvements and bug fixes are included!

Thank you

Thank you to the people who contributed to this release:

Alex Harsányi, Alex Knauth, Alexis King, Ben Greenman, Bert De
Ketelaere, Bob Burger, Bogdan Popa, Cadence Ember, D. Ben Knoble, Denis
Hirn, dr-neptune, Eli Barzilay, Fred Fu, Gustavo Massaccesi, J. Ryan
Stinnett, Jack Firth, Jamie Taylor, Jesse Alama, Jin-Ho King, John
Clements, Lazerbeak12345, Mark Hedlund, Masaya Tojo, Matthew Flatt,
Matthias Felleisen, Mike Sperber, Philip McGrath, Robby Findler, Ryan
Culpepper, Sam Phillips, Sam Tobin-Hochstadt, sarna, Shu-Hung You,
Sorawee Porncharoenwase, Stephen De Gabrielle, sxzzsf, Tom Price, Yukai
Chou, and Zach O'Brien.

Racket version 8.8 is now available from

https://racket-lang.org/

As of this release:

• The dependent contract form, ->i, supports a #:param element that
  specifies dependencies for parameter values that are set during the
  dynamic extent of the function call.
  (See: https://docs.racket-lang.org/reference/function-contracts.html#%28form._%28%28lib._racket%2Fcontract%2Fbase..rkt%29._-~3ei%29%29 )

• The copy-file library function supports permission-management
  arguments.
  (See: https://docs.racket-lang.org/reference/Filesystem.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._copy-file%29%29 )

• Pressing <SHIFT>-return in DrRacket's interactions window makes
  it easier to edit and enter expressions without sending them
  to be evaluated.

• The numeric comparison operators (<, >=, etc.) require at least
  two arguments in the "How To Design Programs" teaching languages.

• Redex has improved typesetting when customized renders are used
  in certain multi-line situations.

• We have fixed many bugs, and written lots of documentation.

The following people contributed to this release:

Alex Knauth, Alexander Shopov, Andreas Schwab, Ben Greenman, Bert De
Ketelaere, Bob Burger, Bogdan Popa, Cameron Moy, Chung-chieh Shan,
D. Ben Knoble, Dan Anderson, David Van Horn, Geoffrey Knauth, Gustavo
Massaccesi, Jamie Taylor, Jason Hemann, Jens Axel Søgaard, Jesse Alama,
jestarray, Johann Rudloff, Johannes Maier, John Clements, Jon Zeppieri,
Lazerbeak12345, Lîm Tsú-thuàn, Matthew Flatt, Matthias Felleisen, Mike
Sperber, Niklas Larsson, Noah Ma, Pavel Panchekha, Philip McGrath,
Philippe Meunier, R. Kent Dybvig, reflektoin, Robby Findler, Sam
Tobin-Hochstadt, Shu-Hung You, Sorawee Porncharoenwase, and Stephen De
Gabrielle

Feedback Welcome

Racket version 8.7 is now available from

https://racket-lang.org/

As of this release:

• Typed Racket offers Shallow and Optional modes for its gradual
  types. These modes lower the cost of interacting with untyped code,
  but provide less protection against buggy interactions.
  (see https://docs.racket-lang.org/ts-reference/behavior-of-types.html )
• Racket uses Unicode 14.0 for character and string operations, and
  includes grapheme operations. DrRacket supports emojis.
  (see https://docs.racket-lang.org/gui/editor-overview.html#%28part._graphemes%29 )
• Racket supports RV64G (RISC-V).
• Programmers can disable definition shadowing using
  (#%declare #:require=define).
  (see https://docs.racket-lang.org/reference/module.html#%28form._%28%28quote._~23~25kernel%29._~23~25declare%29%29 )
• The module dependency graphs available using raco dependencies-graph
  and DrRacket's Module browser are faster and have new package
  filtering support.
  (see https://docs.racket-lang.org/drracket/module-browser.html#%28idx._%28gentag._39._%28lib._scribblings%2Fdrracket%2Fdrracket..scrbl%29%29%29 )
• DrRacket is more responsive when killing programs that produce a lot
  of output.
• Plot 3D allows negative altitude values (e.g., looking at the plot
  from "below".)
  (see https://docs.racket-lang.org/plot/plotting.html#%28def._%28%28lib._plot%2Fmain..rkt%29._plot3d%29%29 )
• The scriblib/bibtex and scriblib/autobib libraries support DOIs.
  (see https://docs.racket-lang.org/scriblib/autobib.html#%28def._%28%28lib._scriblib%2Fautobib..rkt%29._make-bib%29%29 )
• There are many other repairs and improvements!

The following people contributed to this release:

Adit Cahya Ramadhan, Alex Harsányi, Bart van Strien, Ben Greenman, Bob
Burger, Bogdan Popa, Cameron Moy, cheeze2000, D. Ben Knoble, Dan
Anderson, Fred Fu, Geoffrey Knauth, Gustavo Massaccesi, J. Ryan
Stinnett, Jack Firth, Jason Hemann, Jimmy McNutt, John Clements, Lîm
Tsú-thuàn, M. Taimoor Zaeem, Mao Yifu, Matthew Flatt, Matthias
Felleisen, Mike Sperber, Noah Ma, Oliver Flatt, Paulo Matos, Philip
McGrath, Reuben Thomas, Robby Findler, Ryan Culpepper, Sam Phillips, Sam
Tobin-Hochstadt, Samuel Bronson, Shu-Hung You, Sorawee Porncharoenwase,
Sorin Muntean, Stephen Chang, William J. Bowman, and Winston Weinert

Feedback Welcome