v8.13 blog post initial add

Author: jbclements

blog/_src/posts/2024-05-17-racket-v8-13.md

@@ -0,0 +1,53 @@
+    Title: Racket v8.13
+    Date: 2024-05-17T11:41:54
+    Tags: DRAFT
+
+----------------------------------------------------------------------
+
+- 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.
+
+----------------------------------------------------------------------
+
+
+<!-- more -->
+