JSJ 275: Zones in Node with Austin McDaniel
JavaScript Jabber22 Elo 2017

JSJ 275: Zones in Node with Austin McDaniel

JSJ 275: Zones in Node with Austin McDanielThe panel for this week on JavaScript Jabber is Cory House, Aimee Knight, and Charles Max Wood. They speak with special guest Austin McDaniel about Zones in Node. Tune in to learn more about this topic![00:01:11] Introduction to Austin Austin has worked in JavaScript for the past ten years. He currently works in Angular development and is a panelist on Angular Air. He has spent most of his career doing work in front-end development but has recently begun working with back-end development. With his move to back-end work he has incorporated front-end ideas with Angular into a back-end concept.[00:02:00] The Way it WorksNodeJS is an event loop. There is no way to scope the context of a call stack. So for example, Austin makes a Node request to a server and wants to track the life cycle of that Node request. Once deep in the scope, or deep in the code, it is not easy to get the unique id. Maybe he wants to get the user from Passport JS. Other languages – Python, Java – have a concept called thread local storage. They can associate context with the thread and throughout the life cycle of that request, he can retrieve that context.There is a TC39 proposal for zones. A zone allows you to do what was just described. They can create new zones and associate data with them. Zones can also associate unique ids for requests and can associate the user so they can see who requested later in the stack. Zones also allow to scope and create a context. And then it allows scoping requests and capturing contacts all the way down.[00:05:40] Zone UsesOne way Zone is being used is to capture stack traces, and associating unique ids with the requests. If there is an error, then Zone can capture a stack request and associate that back to the request that happened. Otherwise, the error would be vague.Zones are a TC39 proposal. Because it is still a proposal people are unsure how they can use it. Zones are not a new concept. Austin first saw Zones being used back when Angular 2 was first conceived. If an event happened and they wanted to isolate a component and create a scope for it, they used Zones to do so. Not a huge fan of how it worked out (quirky). He used the same library that Angular uses in his backend. It is a specific implementation for Node. Monkey patches all of the functions and creates a scope and passes it down to your functions, which does a good job capturing the information.[00:08:40] Is installing the library all you need to get this started?Yes, go to npminstallzone.js and install the library. There is a middler function for kla. To fork the zone, typing zone.current. This takes the Zone you are in and creates a new isolated Zone for that fork. A name can then be created for the Zone so it can be associated back with a call stack and assigned properties. Later, any properties can be retrieved no matter what level you are at.[00:09:50] So did you create the Zone library or did Google?The Google team created the Zone library. It was introduced in 2014 with Angular 2. It is currently used in front-end development.[00:10:12] Is the TC39 proposal based on the Zone library?While Austin has a feeling that the TC39 proposal came out of the Zone library, he cannot say for sure.[00:10:39] What stage is the proposal in right now?Zone is in Stage Zero right now. Zone JS is the most popular version because of its forced adoption to Angular. He recommends people use the Angular version because it is the most tested as it has a high number of people using it for front-end development.[00:11:50] Is there an easy way to copy the information from one thread to another?Yes. The best way would probably be to manually copy the information. Forking it may also work.[00:14:18] Is Stage Zero where someone is still looking to put it in or is it imminent? Austin believes that since it is actually in a stage, it means it is going to happen eventually but could be wrong. He assumes that it is going to be similar to the version that is out now. Aimee read that Stage Zero is the implementation stage where developers are gathering input about the product. Austin says that this basically means, “Implementation may vary. Enter at your own risk.”[00:16:21] If I’m using New Relic, is it using Zone JS under the hood? Austin is unsure but there something like that has to be done if profiling is being used. There has to be a way that you insert yourself in between calls. Zone is doing that while providing context, but probably not using Zone JS. There is a similar implementation to tracing and inserting logging in between all calls and timeouts.[00:17:22] What are the nuances? Why isn’t everybody doing this?Zone is still new in the JavaScript world, meaning everyone has a ton of ideas about what should be done. It can be frustrating to work with Zone in front-end development because it has to be manually learned. But in terms of implementation, only trying to create a context. Austin recommends Zone if people want to create direct contacts. The exception would be 100 lines of Zone traces because they can get difficult.Another issue Austin has is Node’s native basic weight. Weight hooks are still up in the air. The team is currently waiting on the Node JS community to provide additional information so that they can finish. Context can get lost sometimes if the wrong language is used. He is using Typescript and doesn’t have that problem because it is straightforward.[00:21:44:] Does this affect your ability to test your software at all?No, there have not been any issues with testing. One thing to accommodate for is if you are expecting certain contexts to be present you have to mock for those in the tests. After that happens, the tests should have no problems.PicksCory: Aimee:​ Charles: Austin:LinksSpecial Guest: Austin McDaniel.

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Jaksot(735)

175 JSJ Elm with Evan Czaplicki and Richard Feldman

175 JSJ Elm with Evan Czaplicki and Richard Feldman

02:27 - Evan Czaplicki IntroductionTwitter GitHubPrezi 02:32 - Richard Feldman IntroductionTwitter GitHubNoRedInk02:38 - Elm @elmlang04:06 - Academic Ideas05:10 - Functional Programming, Functional Reactive Programming & Immutability16:11 - ConstraintsFaruk AteşModernizrThe Beauty of ConstraintsTypes / Typescript24:24 - Compilation27:05 - Signals start-app36:34 - Shared Concepts & Guarantees at the Language Level43:00 - Elm vs React 47:24 - IntegrationPortslunr.js52:23 - Upcoming Features54:15 - TestingElm-Test elm-check56:38 - Websites/Apps Build in ElmCircuitHub58:37 - Getting Started with ElmThe Elm Architecture Tutorial Elm Examples59:41 - Canonical Uses?01:01:26 - The Elm Community & ContributionsThe Elm Discuss Mailing ListElm user group SFStack Overflow ?The Sublime Text PluginWebStorm Support for Elm?Codagrunt-elm gulp-elmExtras & ResourcesEvan Czaplicki: Let's be mainstream! User focused design in Elm @ Curry On 2015 Evan Czaplicki: Blazing Fast HTML: Virtual DOM in ElmPicks The Pragmatic Studio: What is Elm? Q&A (Aimee) Elm (Joe) Student Bodies (Joe) Mike Clark: Getting Started With Elm (Joe) Angular Remote Conf (Chuck) Stripe (Chuck) Alcatraz versus the Evil Librarians (Alcatraz, No. 1) by Brandon Sanderson (Chuck) Understanding Comics: The Invisible Art by Scott McCloud (Evan) The Glass Bead Game: (Magister Ludi) A Novel by Hermann Hesse (Evan) The Design of Everyday Things: Revised and Expanded Edition by Don Norman (Richard) Rich Hickey: Simple Made Easy (Richard) NoRedInk Tech Blog (Richard)Special Guests: Evan Czaplicki and Richard Feldman. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

2 Syys 20151h 9min

174 JSJ npm 3 with Rebecca Turner and Forrest Norvell

174 JSJ npm 3 with Rebecca Turner and Forrest Norvell

Don’t miss out! Sign up for Angular Remote Conf! 02:28 - Forrest Norvell IntroductionTwitter GitHub02:37 - Rebecca Turner IntroductionTwitter GitHub Blog03:05 - Why npm 3 Exists and Changes in npm 2 => 3DebuggingLife Cycle OrderingDeduplication08:36 - Housekeeping09:47 - Peer Dependency ChangesThe Singleton Pattern15:38 - The Rewrite Process and How That Enabled Some of the Changes Coming OutCJ Silverio: Npm registry deep dive @ Oneshot Oslo 22:50 - shrinkwrapping 27:00 - Other Breaking Changes?Permissions30:40 - Tiny Jewels33:24 - Why Rewrite?36:00 - npm’s Focus on the Front EndBower npm Roadmap 42:04 - Transitioning to npm 342:54 - Installing npm 344:11 - Packaging with io.js and Node.js 45:16 - Being in BetaPicks Slack List (Aimee) Perceived Performance Fluent Conf Talks (Aimee) Paul Irish: How Users Perceive the Speed of The Web Keynote @ Fluent 2015 (Aimee) Subsistence Farming (AJ) Developer On Fire Episode 017 - Charles Max Wood - Get Involved and Try New Things (Chuck) Elevator Saga (Chuck) BrazilJS (Forrest) NodeConf Brazil (Forrest) For quick testing: `npm init -y`, configure init (Forrest) Where Can I Put Your Cheese? (Or What to Expect From npm@3) @ Boston Ember, May 2015 (Rebecca) Open Source & Feelings Conference (Rebecca) bugs [npm Documentation] (Rebecca) docs [npm Documentation] (Rebecca) repo [npm Documentation] (Rebecca)Special Guests: Forrest Norvell and Rebecca Turner. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

26 Elo 201556min

173 JSJ Online Learning with Gregg Pollack

173 JSJ Online Learning with Gregg Pollack

Check out Angular Remote Conf! 02:55 - Gregg Pollack IntroductionTwitter GitHubEnvy Labs@envylabsCode School@codeschool  Starter Studio05:19 - Code SchoolRails for ZombiesTry Ruby 06:49 - Course ContentCode School Angular.js CoursesBreaking the Ice with Regular ExpressionsThe Fundamentals of Design09:42 - Plots & Storylines11:40 - Code School vs Pluralsight 14:09 - Structuring CoursesFrontend vs BackendBuilding Blocks of Express.jsReal-Time Web with Node.js  Security & SandboxingabecedaryMocha18:21 - JavaScript.com Try jQuery Contributing to JavaScript.comLet Us KnowTry JavaScriptResources22:47 - Designing Exercises & ChallengesabecedaryChai30:31 - The Future of Online LearningThinkfulBloc.ioAirPairHackHands Smarterer34:01 - Teaching Best PracticesPicks Mr. Robot (Gregg) #ILookLikeAnEngineer (Aimee) Why we Need WebAssembly An Interview with Brendan Eich (Aimee) Raspberry Pi 2 Model B (AJ) Periscope (Chuck)Special Guest: Gregg Pollack. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

19 Elo 201533min

172 JSJ NodeSchool with Jason Rhodes

172 JSJ NodeSchool with Jason Rhodes

Check out Angular Remote Conf! 02:22 - Jason Rhodes IntroductionTwitter GitHub BlogSparkPostNodeSchool@nodeschool GitHub: NodeSchoolcharmCityJS@charmcityjs 03:46 - NodeSchoolJason Rhodes: A Story About NodeSchool and Community Building at CascadiaJS 2014Jason Rhodes: NodeSchool Trying Node AND Contributing @ Empire Node 201406:05 - “Workshopper(s)”07:13 - How Meetups Run (Format), Target Audience11:09 - Pair Programming and Peer Learning14:34 - Starting a NodeSchool Chapter15:53 - Implementing Diversity18:07 - Mentoring and Mentorship20:49 - Time Commitment and Effort24:02 - Appealing to All Experience Levels of Attendees26:48 - The NodeSchool Community30:45 - Being a Member of an Open Source CommunityPicks Better Off Ted (Joe) Cat Exercise Wheel (Aimee) That Conference (Joe) primitive.io (Joe) React Rally (Aimee) Falcor YouTube Playlist (Aimee) javascriptjabber.com/15minutes (Chuck) Entreprogrammers Retreat 2015  (Chuck) Love Letter (Jason) charmCityJS (Jason) Mad Max: Fury Road (Jason)Special Guest: Jason Rhodes. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

12 Elo 201541min

171 JSJ Babel with Sebastian McKenzie

171 JSJ Babel with Sebastian McKenzie

02:28 - Sebastian McKenzie IntroductionTwitter GitHub Blog02:53 - Babel (Pronunciation Clarification)05:56 - HistoryLearn ES2015 - Babel09:14 - The State of Babel09:59 - Babel and the TC39 Process11:54 - Features That Can’t Be TranspiledWeak Maps and Proxies    13:45 - Readability and Performance OutputTraceur18:12 - Plugin Architecture19:58 - ES6/2015 Feature ImplementationBlockscopingLabelsExceptionsDestructuring25:49 - The Birth of Babel26:45 - Babel vs Traceur28:08 - Future Babel FeaturesCode OptimizationMinificationLinting30:15 - The Status of ES2015 and ES201631:01 - Browser Support35:03 - Marketing 35:59 - TypeScript 37:24 - Babel Development and LaborPicks Primitive.io (Joe) Armada: The Novel by Ernest Cline (Joe) How to Win Friends & Influence People by Dale Carnegie (AJ) Web Security Warriors Podcast (AJ) Nodevember (Aimee) The Hitchhiker's Guide to the Galaxy by Douglas Adams (Dave) Yellowstone National Park (Dave) React Rally (Dave) Iterativ: AngularJS Kurs (Chuck) Hire Thom Parkin! (Chuck) The Martian by Andy Weir (Sebastian) Five Guys Burgers and Fries (Sebastian)Special Guest: Sebastian McKenzie . Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

5 Elo 201547min

170 JSJ RabbitMQ with Derick Bailey

170 JSJ RabbitMQ with Derick Bailey

Check out RailsClips!   02:38 - Derick Bailey Introduction Twitter GitHub BlogEntreprogrammers RabbitMQ: Patterns for Applications by Derick Bailey 03:36 - RabbitMQrequest-response Messaging Pattern 05:22 - Synchronous/Asynchronous; Chronological/Non-Chronological 10:33 - Why Do JS Devs Care About RabbitMQ? 12:10 - RabbitMQ and Complexity 14:04 - RabbitMQ’s Model Pub/Sub - RedisEnterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions by Gregor Hohpe Exchanges, Queues, and Bindings 22:15 - Event Emitters, Organizing Your Code Documentation 31:18 - Service Busses & Monitoring Systems NServiceBus 32:58 - How do you decide you need a messaging system? 36:40 - When Applications Crash… 39:24 - Event Sourcing Kafka 44:05 - Fault Tolerance/Failure Cases “Just let it fail” 50:21 - Putting RabbitMQ in Place SchedulingLong Wait vs Short Wait 58:28 - Formatting Your Messages RabbitMQ: Patterns for Applications by Derick Bailey 01:04:13 - “Saga” (Workflow) 01:05:10 - RabbitMQ For DevelopersUse code JSJABBER for 20% off the bundle! Picks W3Schools (AJ)1984 by George Orwell (AJ) The edit button on the MDN page (AJ)[YouTube] W3Schools is just... Better (AJ)The Go Programming Language (AJ)[YouTube] Go Programming: Learn the Go Programming Language in One Video (AJ)hackthe.computer (AJ)Maze Algorithm (AJ)A* Algorithm (AJ)React Rally (Jamison)Web Design: The First 100 Years (Jamison)Evan Czaplicki: Let's be mainstream! User focused design in Elm @ Curry On Prague 2015 (Jamison)Paracord (Chuck)Soto Pocket Torch (Chuck)Exploring ES6: Upgrade to the next version of JavaScript by Dr. Axel Rauschmayer (Derick)Small World (Derick)Star Wars Darth Bane Trilogy (Derick)LEGO Star Wars The Empire Strikes Back Slave I Set #75060 (Derick)Special Guest: Derick Bailey. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

29 Heinä 20151h 21min

169 JSJ Property-based Testing (QuickCheck) with Zach Kessin

169 JSJ Property-based Testing (QuickCheck) with Zach Kessin

02:20 - Zach Kessin IntroductionTwitter GitHub Zach's BooksParrotJavaScript Jabber: Episode #057: Functional Programming with Zach KessinTesting Erlang With Quickcheck Book04:00 - Mostly Erlang Podcast 05:27 - Property-based Testing (QuickCheck)07:22 - Property-based Testing and Functional Programmingjsverify 09:48 - Pure FunctionsShrinking18:09 - Boundary Cases20:00 - Generating the Data23:23 - Trending Concepts in JavaScript32:33 - How Property-based Testing Fits in with Other Kind of Testing35:57 - Test FailuresPanel Nolan Lawson: Taming the asynchronous beast with ES7 (Aimee) Nodevember (Aimee) Hipster Sound (Jamison) Om Next by David Nolen (Jamison) Gallant - Weight In Gold (Jamison) React Rally (Jamison) Better Off Ted (Joe) Armada: A Novel by Ernest Cline (Joe) Testing Erlang With Quickcheck Book (Zach) Parrot Universal Notification Interface (Zach) The Famine of Men by Richard H. Kessin (Zach)Special Guest: Zach Kessin. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

22 Heinä 201545min

168 JSJ The Future of JavaScript with Jafar Husain

168 JSJ The Future of JavaScript with Jafar Husain

03:04 - Jafar Husain IntroductionTwitter GitHubNetflixTC3903:29 - The Great Name Debate (ES6, ES7 = ES2015, ES2016!!)05:35 - The Release CycleWhat This Means for Browsers08:37 - Babel and ECMAScript 09:50 - WebAssembly 13:01 - Google’s NACL 13:23 - Performance > Features?ES6 Feature Performance (JavaScript Weekly Article) Features Implemented as Polyfills (Why Bother?)20:12 - TC39 24:22 - New FeaturesDecoratorsPerformance Benefit?28:53 -Transpilers34:48 - Object.observe() 37:51 - Immutable Types 45:32 - Structural Types47:11 - Symbols48:58 - Observables52:31 - Async Functionsasyncawait57:31 - Rapid Fire Round - When New Feature Will Be Released in ES2015 or ES2016let - 15for...of - 15modules - 15destructuring - 15promises - 15default function argument expressions - 15asyncawait - 16Picks ES6 and ES7 on The Web Platform Podcast (AJ) Binding to the Cloud with Falcor Jafar Husain (AJ) Asynchronous JavaScript at Netflix by Jafar Husain @ MountainWest Ruby 2014 (AJ) Let's Encrypt on Raspberry Pi (AJ) adventures in haproxy: tcp, tls, https, ssh, openvpn (AJ) Let's Encrypt through HAProxy (AJ) Mandy's Fiancé's Video Game Fund (AJ) The Murray Gell-Mann Amnesia Effect (Dave) The Majority Illusion (Dave) [Egghead.io] Asynchronous Programming: The End of The Loop (Aimee) Study: You Really Can 'Work Smarter, Not Harder' (Aimee) Elm (Jamison) The Katering Show (Jamison) Sharding Tweet (Jamison) The U.S. Women's National Soccer Team (Joe) mdn.io (Joe) Aftershokz AS500 Bluez 2 Open Ear Wireless Stereo Headphones (Chuck) Autonomy, Mastery, Purpose: The Science of What Motivates Us, Animated (Jafar) Netflix (Jafar) quiescent (Jafar) Clojurescript (Jafar)Special Guest: Jafar Husain. Support this podcast at — https://redcircle.com/javascript-jabber/donationsPrivacy & Opt-Out: https://redcircle.com/privacyBecome a supporter of this podcast: https://www.spreaker.com/podcast/javascript-jabber--6102064/support.

15 Heinä 20151h 17min

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