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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167 JSJ TypeScript and Angular with Jonathan Turner and Alex Eagle

167 JSJ TypeScript and Angular with Jonathan Turner and Alex Eagle

02:27 - Alex Eagle IntroductionTwitter GitHubGoogle02:54 - Jonathan Turner IntroductionTwitter GitHubMicrosoft[Talk] Jonathan Turner: TypeScript and Angular 2 @ ng-conf 2015 [Talk] Jonathan Turner: TypeScript and Angular 2 @ Angular U 2015 03:30 - What is TypeScript?04:40 - Google + Microsoft = <3 (Angular Adopting TypeScript)Rob EisenbergAtScriptJonathan Turner: Angular 2: Built on TypeScript07:18 - TypeScript Accommodating AngularTC39Yehuda KatzAurelia 09:28 - Surge of Interest in Adopting a Typechecker, Type System 14:21 - Angular: Creating a New LanguageKilling Off Wasabi - Part 1 (FogBugz Article)traceur16:46 - The Angular 2 Component System and How it Uses New Annotations for Classes18:01 - Annotations and Decorators22:06 - TypeScript and Babel?; Adding New Features25:25 - Non-Angular Users Adopting TypeScriptVisual Studio Code34:55 - Tooling and Setting Modes for Linting and Static Analysis36:58 - Using Libraries Outside the TypeScript Ecosystem38:11 - Type Definition Files40:15 - Content of the Type System43:19 - Duck Typing 45:12 - Getting People to Care about TypeScript 49:16 - The Angular and TypeScript RelationshipPicks f.lux (Aimee) Jafar Husain: Functional Programming in Javascript (learnrx) (Aimee) Startup Timelines (Jamison) Friday Night Lights (Jamison) React Rally (Jamison) Evan Farrer: Unit testing isn't enough. You need static typing too. (Dave) AngularConnect (Joe) ng-click.com (Joe) mdn.io (Joe) Sonic Pi (Chuck) Error Prone (Alex) AudioScope-ng2 (Jonathan) The Nintendo World Championships (Jonathan)Special Guests: Alex Eagle and Jonathan 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.

8 Heinä 20151h 1min

166 JSJ New Relic with Wraithan and Ben Weintraub

166 JSJ New Relic with Wraithan and Ben Weintraub

02:27 - Coding House Scholarship Winners with AJ and AimeeEmily Dreisbach (50% scholarship winner)Blake Gilmore (50% scholarship winner)Berlin Sohn (100% scholarship winner)Congratulations from the panelists of JavaScript Jabber! 09:48 - Ben Weintraub IntroductionTwitter GitHub10:40 - Wraithan IntroductionTwitter GitHub Blog11:01 - Why Care About Monitoring?Insights13:08 - Mixedpanel 13:57 - How it Works on the BackendTime-series DataMySQLstatsdTracesS3CassandraInsights17:26 - New Relic’s CEO: Lew Cirne 18:37 - How the Node Agent WorksExpress.js Specifics    Transactions and Controller NamesDatabase MonitoringMongoDBOracle Support23:27 - Deciding Which Databases to SupportPostgres26:41 - Browser Monitoring32:54 - Using Zombie.js?34:11 - Tree of Causality Track.js 39:37 - Monetizing Aspect, Viewable Source/Source Available Code47:28 - PerformanceCodeGenmraleph Blog v8-perfBenchmarkingjsPerf01:00:53 - New Relic@newrelicNew Relic Blog New Relic Community ForumPicks mraleph Blog (Wraithan) v8-perf (Wraithan) The Dear Hunter: A Night on the Town (Jamison) React Rally (Jamison) caddy (AJ) Windows 10: Setup your Raspberry Pi 2 (AJ) Remote debugging protocol (Ben) Chrome Dev Tools Filmstrip View (Ben)Special Guests: Ben Weintraub and Wraithan . 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.

1 Heinä 20151h 4min

165 JSJ ShopTalk with Chris Coyier and Dave Rupert

165 JSJ ShopTalk with Chris Coyier and Dave Rupert

02:43 - Dave Rupert IntroductionTwitter GitHub BlogParavel03:42 - Chris Coyier IntroductionTwitter GitHub BlogCSS-Tricks CodePen 06:24 - The ShopTalk Show and Podcasting@shoptalkshow“What do I learn next?” => “Just Build Websites!”Question & Answers Aspect23:19 - Tech Is A NichePaul Ford: What is Code? 29:51 - Balancing Technical Content for All Levels of ListenersCommunity Opinion38:42 - Learning New CSS Tricks (Writing Blog Posts)Code Golf41:54 - The Accessibility Project Adventures in Angular Episode #027: Accessibility with Marcy Sutton Anne Gibson: An Alphabet of Accessibility Issues 56:02 - Favorite & Cool EpisodesShowTalk Show Episode #091: with Jamison Dance and Merrick Christensen ShopTalk Show Episode #101: with John ResigShopTalk Show Episode #157: with Alex Russell  ShopTalk Show Episode #147: with Tom Dale ShopTalk Show Episode #123: Special Archive Episode from 2004 ShopTalk Show Episode #166: with Lisa IrishShopTalk Show Episode #161: with Eric Meyer Picks FIFA Women's World Cup (Joe) Winnipeg (Joe) The Martian by Andy Weir (Joe) Zapier (Aimee) SparkPost (Aimee) dev.modern.ie/tools/vms (AJ) remote.modern.ie (AJ) Microsoft Edge (AJ) StarFox Zero for Wii U (AJ) Hot Plate (AJ) untrusted (AJ) Skiplagged (Dave) Judge John Hodgman (Dave) Wayward Pines (Chris) Sturgill Simpson (Chris) The Economic Value of Rapid Response Time (Dave) The Adventure Zone (Dave) React Rally (Jamison) Matsuoka Shuzo: NEVER GIVE UP (Jamison) DESTROY WITH SCIENCE - Quantum Loop (Jamison) Serial Podcast (Chuck) Ruby Remote Conf (Chuck)Special Guests: Chris Coyier and Dave Rupert. 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.

24 Kesä 20151h 15min

164 JSJ Rendr with Spike Brehm

164 JSJ Rendr with Spike Brehm

Get your Ruby Remote Conf tickets and check out the @rubyremoteconf Twitter feed for exciting updates about the conference. 02:22 - Spike Brehm IntroductionTwitter GitHubBlogAirbnb@airbnb@airbnbnerds03:07 - rendr Isomorphic JavaScriptSingle-Page ApplicationRoutes and Controllers06:24 - Why the back and forth between server-side and client-side applications?Rendering Content for SEO (Search Engine Optimization)Spike Brehm: Building Isomorphic Apps @ JSConf.Asia 2014 (Video) Spike Brehm: Building Isomorphic Apps @ JSConf.Asia 2014 (Slides)Spike Brehm: The Evolution of Airbnb's FrontendCaching20:28 - Tools That HelpBrowserifywebpackset-cookie22:21 - Why do this? Who gets statically and dynamically rendered pages?Airbnb Mobile HydrationReactVirtual DOMDiffingDelegation30:26 - DOM and String-based TemplatingHandlebars.jsExpress.jsMounting33:11 - Use CasesMeteorAsana36:08 - Why does Isomorphic JavaScript get so much hate?Charlie Robbins: Scaling Isomorphic Javascript Code Michael Jackson: Universal JavaScriptPicks The Paleolithic Diet (Aimee) Programming Throwdown (Aimee) Listen to other people’s views (Chuck) AJ O'Neal: Access web pages through your home network via SSH (AJ) AJ O'Neal: Reverse VPN: turn any private device into public cloud server (AJ) Alt (Spike) Tame Impala (Spike)Special Guest: Spike Brehm. 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.

17 Kesä 201554min

163 JSJ Flow with Jeff Morrison and Avik Chaudhuri

163 JSJ Flow with Jeff Morrison and Avik Chaudhuri

03:32 - Jeff Morrison IntroductionTwitter GitHubFacebook03:46 - Avik Chaudhuri IntroductionTwitter GitHub LinkedInFacebook04:27 - Flow @flowtype [GitHub] flow05:36 - Static Type CheckingDynamic vs Static Type Languages09:52 - Flow and Unit TestingJest12:39 - Gradual Typing 15:07 - Type Inference 17:50 - Keeping Up with New Features in JavaScriptBabel20:49 - Generators24:46 - Working on Flow28:27 - Flow vs TypeScriptInference SupportTony Hoare: Null References: The Billion Dollar Mistake35:41 - Putting the “Java” Back in JavaScriptServer/Client OverviewPrototyping45:26 - Flow and the JavaScript Community46:43 - React Support48:39 - Documentationgh-pages (link to the docs)IRC Channel for Flow: #flowtype on webchat.freenode.netPicks Nolan Lawson: We have a problem with promises (Aimee) Jim 'N Nick's BBQ Restaurant (Aimee) Frank McSherry: Scalability! But at what COST? (Jamison) Frank McSherry: Bigger data; same laptop (Jamison) Greg Wilson: What We Actually Know About Software Development, and Why We Believe It's True (Jamison) Marron: Time-Travel Debugging for JavaScript/HTML Applications (Jeff) Real World OCaml (Jeff) Muse (Jeff) Shtetl-Optimized (Avik) Chef's Table (Avik)Special Guests: Avik Chaudhuri and Jeff Morrison. 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.

10 Kesä 20151h 2min

162 JSJ ESLint with Jamund Ferguson

162 JSJ ESLint with Jamund Ferguson

02:15 - Jamund Ferguson IntroductionTwitter GitHubBlogPayPalJamund Ferguson: JavaScript Linting for Code Quality & ESLint Overview02:47 - Lint (Background)JSLintDouglas CrockfordJSHintESLint[GitHub] eslintNicholas Zakas[Gitter] eslint04:48 - Keeping ESLint Up-to-date​​Esprima Ariya Hidayatespree Babelbabel-eslintES6 (ECMAScript 6)08:09 - Abstract Syntax Tree (ASTs)Jamund Ferguson: Don’t be scared of abstract syntax trees MinificationUglifyJS13:28 - Using Lint ToolsContext SwitchingAspects to Linting:Code StandardizationCatching Bad MistakesJSCS (JavaScript Code Style)“Extends”20:42 - Are there a downsides to linting?The Social Problem23:40 - Establishing RulesBikesheddingConsistency25:12 - Cool ESLint Featureshandle-callback-errNot Throwing LiteralsNo Restricted ModulesJamund Ferguson: Error Handling in Node.js @ MountainWest JavaScript 2014 30:45 - How ESLint Works Internallyeslint-plugin-angularConfiguration and Defaults40:07 - Getting Started with Linting43:03 - Autofixer 44:41 - Plugins46:47 - Linter Feedback From the PanelPicks Mozilla (AJ) We Will All Be Game Programmers (Aimee) Search Inside Yourself: The Unexpected Path to Achieving Success, Happiness (and World Peace) by Chade-Meng Tan (Aimee) Good Mythical Morning (Dave) Salt Lake City (Dave) BB King Calls This One Of His Best Performances (Jamison) json-server (Jamison) Austenland (Joe) Supergirl (Joe) A Short History of Nearly Everything by Bill Bryson (Jamund) The Book of Mormon (Jamund)     Special Guest: Jamund Ferguson. 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.

3 Kesä 201558min

161 JSJ Rust with David Herman

161 JSJ Rust with David Herman

02:52 - David Herman IntroductionTwitter BlogJavaScript Jabber Episode #54: JavaScript Parsing, ASTs, and Language Grammar w/ David Herman and Ariya HidayatJavaScript Jabber Episode #44: Book Club! Effective JavaScript with David HermanEffective JavaScript by David Herman@effectivejsTC39Mozilla03:50 - The Rust Programming Language[GitHub] rust06:31 - “Systems Programming Without Fear”07:38 - High vs Low-level Programming LanguagesGarbage Collection and DeallocationMemory SafetyPerformance and Control Over Performance11:44 - Stack vs Heap Memory Etymology of "Foo" RAII (Resource Acquisition Is Initialization)16:52 - The Core of RustOwnershipType System24:23 - Segmentation Fault (Seg Faults)27:51 - How much should programmers care about programming languages? Andrew Oppenlander: Rust FFI (Embedding Rust in projects for safe, concurrent, and fast code anywhere.)32:43 - Concurrency and Multithreaded Programming35:06 - Rust vs Go 37:58 - servo 40:27 - asm.jsemscripten42:19 - Cool Apps Built with RustSkylightWit.ai45:04 - What hardware architectures does the Rust target?45:46 - Learning RustRust for Rubyists by Steve KlabnikPicks Software Engineering Radio (Dave) How Will You Measure Your Life? by Clayton M. Christensen (Dave) The Presidents of the United States of America (Dave) Design Patterns in C (AJ) Microsoft Edge Dev Blog: Bringing Asm.js to Chakra and Microsoft Edge (AJ) The Web Platform Podcast: Episode 43: Modern JavaScript with ES6 & ES7 (AJ) Firefox Fame Phone (AJ) iTunes U CS106A (Programming Methodology) (Aimee) Valerian Root on Etsy (Aimee) The Dear Hunter - Live (Jamison) Designing Data-Intensive Applications by Martin Kleppmann (Jamison) Fogus: Perlis Languages (Jamison) Galactic Civilizations III (Joe) Visual Studio Code (Joe) Tessel 2 (Dave) Event Driven: How to Run Memorable Tech Conferences by Leah Silber (Dave) Plush Hello Kitty Doll (Dave)Special Guest: David Herman. 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.

27 Touko 20151h 5min

160 JSJ Stormpath with Robert Damphousse

160 JSJ Stormpath with Robert Damphousse

02:24 - Robert Damphousse Introduction02:40 - OAuthOpenIDJWT07:15 - Stormpath@gostormpath[GitHub] StormpathBlog08:38 - Authorization Information Storage11:29 - Stormpath Authentication vs OAuth AuthenticationResource Owner Password Credentials Grant14:43 - Caching 15:41 - Building Backends as a Service?18:21 - Security19:12 - Using CassandraStormpath in Planet Cassandra: 50k Accounts Imported in Under 200ms20:27 - Use Cases22:27 - Authentication as a Service 23:40 - 2FA (Two Factor Authentication)?24:07 - REST APIsLaunch a SaaS – and Battle Your Robot – With Stormpath25:39 - Making Complete AppsFullContactFirebase26:33 - Security (Cont’d)27:34 - In-Between Layer (Authentication API)28:40 - Browser-Based vs Mobile Application Use29:44 - Angular, React, Flux, 32:02 - React Native?33:05 - Stormpath Life Expectancy35:09 - Customers36:12 - Active Directory, LDAP (Lightweight Directory Access Protocol) 37:05 - Support and PricingPicksPutting the "fun" back in "funeral"! Celebrating the death of old IE browsers on January 12! (Dave) Giant Star Wars LEGO Super Star Destroyer Shattered at 1000 fps | Battle Damage (Dave) GitLab (Dave) Allen Pike: JavaScript Framework Fatigue (Aimee) The Cult of Work You Never Meant to Join (Aimee) Serial (AJ) HotPlate (AJ) Design Patterns in C (AJ) OAuth3 (AJ) JS Remote Conf Videos (Chuck) Ruby Remote Conf (Chuck) Traction: Get a Grip on Your Business by Gino Wickman (Chuck) Startups For the Rest of Us (Chuck) The Guest House: A Poem (Robert) The Hiring Post (Robert) Front-end Job Interview Questions (Robert)Special Guest: Robert Damphousse. 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.

20 Touko 201550min

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