June 2026 - ruby-talk - ml.ruby-lang.org

[ruby-talk:444833] JRuby 10.0.6.0 released
by Charles Oliver Nutter 11 Jun '26

11 Jun '26

The JRuby community is pleased to announce the release of JRuby 10.0.6.0. - Homepage: https://www.jruby.org/ - Download: https://www.jruby.org/download JRuby 10.0.6.x targets Ruby 3.4 compatibility. Thank you to our contributors this release, you help keep JRuby moving forward! @chadlwilson <https://github.com/chadlwilson>, @kares <https://github.com/kares>, @sampokuokkanen <https://github.com/sampokuokkanen> Notable Changes:Standard Library - erb has been updated to 4.0.4.1 to address CVE-2026-41316. (#9389 <https://github.com/jruby/jruby/pull/9389>) - jruby-openssl has been updated to 0.16.0, fixing many long-standing issues with SSLSocket. (#6455 <https://github.com/jruby/jruby/issues/6455>, #8935 <https://github.com/jruby/jruby/issues/8935>, #9390 <https://github.com/jruby/jruby/pull/9390>) Java Integration - Performance and consistency improvements for passing a block or proc as the implementation of a Java interface. (#1401 <https://github.com/jruby/jruby/issues/1401>, #9401 <https://github.com/jruby/jruby/pull/9401>, #9424 <https://github.com/jruby/jruby/issues/9424>) 23 Issues and PRs resolved for 10.0.6.0 - #1401 Java interface using closure implementaion is slower than mixin implementation <https://github.com/jruby/jruby/issues/1401> - #6455 Unhandled IOError –> SSLSocket.java:893:in `sysread_nonblock’ <https://github.com/jruby/jruby/issues/6455> - #8935 Error during gem push using jruby <https://github.com/jruby/jruby/issues/8935> - #9367 review (wrong) asserts <https://github.com/jruby/jruby/pull/9367> - #9368 [refactor] remove duplicate fallback in CallableSelector <https://github.com/jruby/jruby/pull/9368> - #9372 Crash when AOT compiling rubocop-ast sources <https://github.com/jruby/jruby/issues/9372> - #9373 Ensure the initial string has correct size <https://github.com/jruby/jruby/pull/9373> - #9389 [10.0] deps(stdlib): bump erb from 4.0.4 to 4.0.4.1 to resolve CVE-2026-41316 <https://github.com/jruby/jruby/pull/9389> - #9390 [10.0] [deps] bump jruby-openssl to 0.16.0 <https://github.com/jruby/jruby/pull/9390> - #9401 improve performance for Java “block-to-interface” conversion <https://github.com/jruby/jruby/pull/9401> - #9416 Checking out aws-sdk-ruby creates a file with binary data. <https://github.com/jruby/jruby/issues/9416> - #9421 Fix missing frozen check in 1 and 2-element Array sort!/reverse! <https://github.com/jruby/jruby/pull/9421> - #9424 proc to interface inconsistency with multiple args <https://github.com/jruby/jruby/issues/9424> - #9451 [fix] escape shell metachars in chdir: to prevent injection <https://github.com/jruby/jruby/pull/9451> - #9457 Deprecate and replace all RubyHash, RubyString, and RubyArray constructors <https://github.com/jruby/jruby/issues/9457> - #9458 Support backtrace_locations with Java exceptions <https://github.com/jruby/jruby/issues/9458> - #9461 [ji] support java.lang.Throwable#backtrace_locations <https://github.com/jruby/jruby/pull/9461> - #9474 Deprecate RubyHash constructors for 10.1 abstraction <https://github.com/jruby/jruby/pull/9474> - #9476 Backport extended dist verification to 10.0 <https://github.com/jruby/jruby/pull/9476> - #9478 [fix] @JRubyMethod error with required>=1 and var-args <https://github.com/jruby/jruby/pull/9478> - #9484 Make JVM bytecode version detection more robust <https://github.com/jruby/jruby/pull/9484> - #9489 Deprecate all public String constructors <https://github.com/jruby/jruby/pull/9489> - #9490 Deprecate public RubyArray constructors <https://github.com/jruby/jruby/pull/9490> *Charles Oliver Nutter* *Architect and Technologist* Headius Enterprises https://www.headius.com headius(a)headius.com

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[ruby-talk:444832] [ANN] Pterocos: A free online editor for Ruby, Python, and SQL
by amine kheddache 11 Jun '26

11 Jun '26

Hello everyone, I wanted to share a project I've been working on: Pterocos. It's a free online editor that runs entirely in your browser - no installation, no account required. What you can do with it: - Ruby (newly added) - Python - SQL (SQLite and DuckDB) - Lua - HTML/CSS/JS Why it might be useful for Ruby developers: - Quickly test a Ruby method or algorithm without opening your full IDE - Prototype scripts when away from your main machine - Share runnable Ruby code examples with teammates or learners The editor runs client-side, so your code never leaves your browser. Try it: https://pterocos.eu.org I'd love to get your feedback. What Ruby features or gems would make this more useful for your workflow? Thank you for your time. Best regards, Amine KHD

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[ruby-talk:444831] JRuby 9.4.15.0 released
by Charles Oliver Nutter 08 Jun '26

08 Jun '26

The JRuby community is pleased to announce the release of JRuby 9.4.15.0. - Homepage: https://www.jruby.org/ - Download: https://www.jruby.org/download JRuby 9.4.15.x targets Ruby 3.4 compatibility. Thank you to our contributors this release, you help keep JRuby moving forward! With this release, JRuby 9.4 moves into end-of-life (“EOL”). This means that future releases of 9.4.x will only be provided as needed by commercial JRuby users. Get in touch with us if you require long-term support options for the JRuby 9.4.x series. 38 Issues and PRs resolved for 9.4.15.0 - #8801 ruby/logger gem broken after version 1.6.3 using JRuby on Windows <https://github.com/jruby/jruby/issues/8801> - #8924 const_defined? returns false for External Constants in JRuby 10.0.1.0 and 9.4.14.0 <https://github.com/jruby/jruby/issues/8924> - #8974 Use RuboCop to clean up poms (9.4) <https://github.com/jruby/jruby/pull/8974> - #8990 Launcher defensive fixes 9.4 <https://github.com/jruby/jruby/pull/8990> - #9000 JRuby 9.4.14.0 “wrong number of arguments” when jit.threshold=0 <https://github.com/jruby/jruby/issues/9000> - #9001 Backport indy ruby2_keywords ArgumentError fix <https://github.com/jruby/jruby/pull/9001> - #9002 Backport ArgumentError message update from 2010 <https://github.com/jruby/jruby/pull/9002> - #9012 Rexml security updateUpdate rexml gem to solve CVE-2025-58767 (9.4) <https://github.com/jruby/jruby/pull/9012> - #9030 Official JDK 25 support for JRuby 9.4 <https://github.com/jruby/jruby/pull/9030> - #9031 Don’t restrict object search to modules <https://github.com/jruby/jruby/pull/9031> - #9032 Different arguments for each.map vs each and map alone <https://github.com/jruby/jruby/issues/9032> - #9033 Backport jruby.sh and .jruby.release changes from 10 <https://github.com/jruby/jruby/pull/9033> - #9037 fix: clear code-range when re-using a string buffer (#9035) <https://github.com/jruby/jruby/pull/9037> - #9044 Difference in Float() hex parsing between JRuby and CRuby <https://github.com/jruby/jruby/issues/9044> - #9045 Fixes basic float hex value strings for Kernel#Float <https://github.com/jruby/jruby/pull/9045> - #9054 Migrate .java-version contents to .jruby.release (9.4) <https://github.com/jruby/jruby/pull/9054> - #9104 [9.4] Update jruby-openssl to v0.15.5 to resolve BouncyCastle 1.79 vulnerability (sonatype-2025-001911). <https://github.com/jruby/jruby/issues/9104> - #9105 [9.4] Update jruby-openssl to 0.15.5 <https://github.com/jruby/jruby/pull/9105> - #9128 [9.4] fix(launcher): correct parsing of java release files under Bash/msys2 etc on Windows <https://github.com/jruby/jruby/pull/9128> - #9160 Update strscan to 3.1.7 <https://github.com/jruby/jruby/pull/9160> - #9186 9032 Fix Different arguments for each.map vs each and map alone <https://github.com/jruby/jruby/pull/9186> - #9201 Extract float formatting into a static method (9.4) <https://github.com/jruby/jruby/pull/9201> - #9295 Issue with calling IO.popen(env, cmd, opts) on Windows <https://github.com/jruby/jruby/issues/9295> - #9308 Process.detach raises ArrayIndexOutOfBoundsException if called from a thread that is not the main thread <https://github.com/jruby/jruby/issues/9308> - #9311 Push a frame for thread toplevel <https://github.com/jruby/jruby/pull/9311> - #9347 Use JDK for File#flock on Windows <https://github.com/jruby/jruby/pull/9347> - #9351 Fix non-native IO.popen env + kwargs handling <https://github.com/jruby/jruby/pull/9351> - #9353 Update JNR dependencies <https://github.com/jruby/jruby/pull/9353> - #9377 Checking out aws-sdk-ruby creates a file with binary data. <https://github.com/jruby/jruby/issues/9377> - #9387 [9.4] deps(stdlib): bump erb from 2.2.3 to 4.0.4.1 to resolve CVE-2026-41316 <https://github.com/jruby/jruby/pull/9387> - #9391 [9.4] [deps] bump jruby-openssl to 0.16.0 <https://github.com/jruby/jruby/pull/9391> - #9415 Don’t read or write anything once length is zero <https://github.com/jruby/jruby/pull/9415> - #9443 JRuby 9.4 does not generate bytecode for newer JDK versions <https://github.com/jruby/jruby/issues/9443> - #9444 Allow bytecode version to be open-ended <https://github.com/jruby/jruby/pull/9444> - #9464 [fix] escape shell metachars in chdir: to prevent injection <https://github.com/jruby/jruby/pull/9464> - #9467 [9.4] backport [ji] support java.lang.Throwable#backtrace_locations (#9461) <https://github.com/jruby/jruby/pull/9467> - #9477 Dist verification 9.4 <https://github.com/jruby/jruby/pull/9477> - #9480 [fix] @JRubyMethod error with required>=1 and var-args <https://github.com/jruby/jruby/pull/9480> *Charles Oliver Nutter* *Architect and Technologist* Headius Enterprises https://www.headius.com headius(a)headius.com

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[ruby-talk:444828] Slides for RubyConf Austria 2026 Talk "Frontend Ruby on Rails with Glimmer DSL for Web"
by Andy Maleh 02 Jun '26

02 Jun '26

My talk “Frontend Ruby on Rails with Glimmer DSL for Web” went well at RubyConf Austria 2026. Especially given that after the talk, Chad Fowler (the starter of RubyConf and famous book author of The Passionate Programmer, among other books) told me “good job”, and Obie Fernandez (a famous entrepreneur and book author of The Rails Way, among other books) told me he will try Glimmer DSL for Web because he doesn’t like React.js. Continue reading the blog post: https://andymaleh.blogspot.com/2026/06/rubyconf-austria-2026-frontend-ruby-… Short link for slides: https://bit.ly/glimmer-rubyconf-at-2026 GitHub: https://github.com/AndyObtiva/glimmer-dsl-web

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[ruby-talk:444825] Pattern matching as String, passing patters to functions
by Marcus Poller 01 Jun '26

01 Jun '26

Hi Rubyists, is this the place to ask beginner questions? I am confused about pattern matching. It only seems to work when the key is of type symbol. How would I apply pattern matching to string keys? Example require "yaml" yaml_data=" cards_on_hand: - suite: hearts value: '9' - suite: hearts value: 'king' - suite: diamonds value: 'king' " y=YAML.safe_load(yaml_data, symbolize_names: true) puts y.inspect y[:cards_on_hand].each do |a_card| case a_card in { suite: String => captured_suite, value: 'king' } puts "you have a king on your hand and its suite is #{captured_suite}" else puts "a card of no interest #{a_card.inspect}" end end {cards_on_hand: [{suit: "hearts", value: "9"}, {suit: "hearts", value: "king"}, {suit: "diamonds", value: "king"}]} a card of no interest {suite: "hearts", value: "9"} you have a king on your hand and its suite is hearts you have a king on your hand and its suite is diamonds Second question: Since everything in Ruby is an object, how do I pass patterns into a function? Even more specific, how do I handle capture when passing to a function? Cheers, Marcus

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