Katz Got Your Tongue

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• Polaris: What I'm Working On

  I've been spending my time doing a lot of long-overdue work on Ember, Glimmer and the Handlebars parser. I figured I'd post a quick list of the work.

  2024/10/29 06:57Yehuda Katzhttps://yehudakatz.com/2024/10/28/polaris-what-im-working-on/

  

• Why Ember is Different: Running Browser Tests in a Browser

  • #Polaris

  Ember's default test runner is unusual, and it's for a good reason. We believe that since your app runs in a browser, your tests should run in the browser. To debug a test, you should be able to pause the test and then directly inspect it using the dev tools. It's different, but in a good way!

  2024/9/12 13:55Yehuda Katzhttps://yehudakatz.com/2024/09/12/why-ember-is-different-running-browser-tests-in-a-browser/

  

• Exploring Ember Polaris: CSS Modules Without Addons

  • #Polaris

  The Polaris edition of Ember sheds Emberisms in favor of integrating directly with the JavaScript ecosystem. This post shows how you can directly use CSS modules in modern Ember applications.

  2024/9/11 10:33Yehuda Katzhttps://yehudakatz.com/2024/09/11/css-modules-in-ember-without-addons/

  

• Exploring Ember Polaris: A Fresh Take on the Component Format

  • #Polaris

  What if you could put multiple "single-file components" into one file? Without JSX Spaghetti? Ember's syntax has already landed, and it's kind of the best of both worlds.

  2024/9/9 12:18Yehuda Katzhttps://yehudakatz.com/2024/09/09/exploring-ember-polaris-a-fresh-take-on-the-component-format/

• Ember Octane: Airtable Time

  This post is the fourth in a series on building an Ember application HTML-first. In this series, we're going to build the EmberConf schedule application from the ground up.Let's GoComponentsPulling Out DataAirtable Time ← This postCleaning Things UpAdding More

  2020/4/7 01:20Yehuda Katzhttps://yehudakatz.com/2020/04/06/ember-octane-airtable-time/

• Ember Octane: Pulling Out Data

  This post is the third in a series on building an Ember application HTML-first. In this series, we're going to build the EmberConf schedule application from the ground up.Let's GoComponentsPulling Out Data ← This postAirtable TimeCleaning Things UpAdding More

  2020/3/31 03:57Yehuda Katzhttps://yehudakatz.com/2020/03/30/ember-octane-a-data-file/

• Ember Octane: Components

  This post is the second in a series on building an Ember application HTML-first. In this series, we're going to build the EmberConf schedule application from the ground up.Let's GoComponents ← This postPulling Out DataAirtable TimeCleaning Things UpAdding More

  2020/3/27 05:16Yehuda Katzhttps://yehudakatz.com/2020/03/26/ember-octane-components/

• Ember Octane: Let's Go

  Last week, in my Virtual EmberConf keynote, I told the story about how I got started as a programmer. To make a long story short, I took a job as a web designer for a large non-profit. I had picked up a little bit of HTML and CSS through

  2020/3/26 00:01Yehuda Katzhttps://yehudakatz.com/2020/03/25/ember-octane-lets-go/

• "We're the Together Framework"

  I remember the first time I saw Melanie Sumner describe Ember as "the together framework".It was 2019, and I was sitting in the audience of the Amsterdam Ember meetup for the premiere of Ember: The Documentary. The lights had dimmed, the room quieted down, but my nervous

  2020/3/9 12:18Yehuda Katzhttps://yehudakatz.com/2020/03/09/the-together-framework/

• Together: The Merb Story

  I'll never forget the day that I became a member of the Rails core team.For all of 2008 (and the better part of 2007), I was working on a competitor to Ruby on Rails called Merb.I loved Merb, and was excited to share it with anyone

  2020/2/20 03:29Yehuda Katzhttps://yehudakatz.com/2020/02/19/together-the-merb-story/

• #EmberJS2019 More Accessible Than Ever

  It's that time of year again: time to think about what the next year of Ember should hold.Personally, I feel really great about the community's effort around the Octane edition. What's great about Octane, and any future edition we do, is that it&

  2019/5/21 03:39Yehuda Katzhttps://yehudakatz.com/2019/05/20/ember-2019/

• Fun With PowerShell: Let's Get Started (Digging Deeper into "The Pipeline")

  • #PowerShell

  In this article, we dig deeper into the concepts we learned in the first post in the Fun With PowerShell series, including the pipeline.

  2019/5/2 06:43Yehuda Katzhttps://yehudakatz.com/2019/05/01/powershell-lets-get-started-pipeline/

• Fun with PowerShell: Deduplicating Records

  • #PowerShell

  Let's deduplicate the list of Avengers movies we got in the previous post.

  2019/4/27 00:00Yehuda Katzhttps://yehudakatz.com/2019/04/26/powershell-deduplication/

• Fun with PowerShell: Let's Get Started!

  • #PowerShell

  I've been having a lot of fun playing around with PowerShell recently. Let's see what it can do in Part 1 of a series on learning PowerShell with real-world examples!

  2019/4/24 23:41Yehuda Katzhttps://yehudakatz.com/2019/04/24/powershell-lets-get-started/

  

• Fun with PowerShell: Installation

  In my post on exploring PowerShell, I jumped right in to exploring PowerShell.If you're on Windows, you already have PowerShell, and you can follow along.If you're on OSX, the easiest way to install PowerShell is$ brew cask install powershell $ pwsh There are

  2019/4/24 23:30Yehuda Katzhttps://yehudakatz.com/2019/04/24/powershell-installation/

• #Rust2018 - Exploring New Contribution and Feedback Models

  Since I'm coming pretty late to the #Rust2018 party, most of the things I wanted to say have already been said! Ashley's kick-off post [https://blog.rust-lang.org/2018/01/03/new-years-rust-a-call-for-community-blogposts.html] was kind of a meta-#Rust2018 for me, calling for us to experiment with new ways to get community feedback in Rust. I personally really enjoyed all of the energy in #Rust2018, and hope that we continue to experiment on this front. I really loved Julia's post [https://jvns

  2018/1/16 04:40Yehuda Katzhttps://yehudakatz.com/2018/01/15/rust-2018/

• The Facebook Patent License Punishes You For Suing Facebook, But Lets Them Sue You

  There's been a lot of discussion recently about the Facebook patent clause ("PATENTS" in Facebook repositories). While most of the objections to the license have focused on the patent revocation provisions, most of the defense focuses on the patent grant. This has meant that both sides are talking past each other, and casual readers are getting confused about what this is all about. -------------------------------------------------------------------------------- The Facebook patent grant co

  2017/9/17 03:12Yehuda Katzhttps://yehudakatz.com/2017/09/16/facebook-patent-clause-protects-facebook-not-you/

• The Glimmer VM: Boots Fast and Stays Fast

  Great web applications boot up fast and stay silky smooth once they've started. In other contexts, applications can choose quick loading or responsiveness once they've loaded. Great games can get away with a long loading bar as long as they react instantly once the gamer gets going. In contrast, scripting languages like Ruby, Python or Bash optimize for instant boot, but run their programs more slowly. To optimize for boot time, scripting languages use interpreters and avoid expensive compilat

  2017/4/6 03:49Yehuda Katzhttps://yehudakatz.com/2017/04/05/the-glimmer-vm-boots-fast-and-stays-fast/

• Why I'm Working on Yarn

  (This post is about Yarn, a new JS package manager that was announced today [https://code.facebook.com/posts/1840075619545360].) I work with Node and npm packages almost every day, on Tilde's main app, Skylight, or on one of Ember's many packages. Many have remarked upon how fast the npm registry has grown, and it's hard to imagine working on any of my packages without the npm ecosystem. I've also worked on a couple of application-level package managers (Bundler [http://bundler.io/] for Ruby

  2016/10/11 23:01Yehuda Katzhttps://yehudakatz.com/2016/10/11/im-excited-to-work-on-yarn-the-new-js-package-manager-2/

• Podcasts

  JSON API, Episode #189 The Changelog [https://changelog.com/189/], 01/01/16 -------------------------------------------------------------------------------- Jay Phelps Interviews Yehuda Katz on TC39 The Modern Web UI Podcast [https://soundcloud.com/modern-web/jay-phelps-interviews-yehuda-katz-on-tc39], 12/12/15 -------------------------------------------------------------------------------- Okay With Instability The BikeShed Podcast [http://bikeshed.fm/39], 11/15/15 ---------------------

  2015/12/14 01:59Yehuda Katzhttps://yehudakatz.com/podcasts/

• Talks

  A collection of my talks over the years. Mostly EmberConf keynotes, but some other fun stuff too, especially if you're an Ember Lore Junkie.

  2015/11/12 05:45Yehuda Katzhttps://yehudakatz.com/talks/

• Projects

  Creator * Ember.js [http://emberjs.com/] * Handlebars [http://handlebarsjs.com/] * Bundler [http://bundler.io/] * Thor [http://whatisthor.com/] * json:api [http://jsonapi.org/] * Cargo [https://crates.io/] * Tokaido [https://github.com/tokaido] * Moneta [https://github.com/minad/moneta] * Janus [https://github.com/carlhuda/janus] * Extensible Web Manifesto [https://extensiblewebmanifesto.org/] * Nushell [https://www.nushell.sh/] Core Team Member Current and historic. Visit each proje

  2015/7/10 05:52Yehuda Katzhttps://yehudakatz.com/projects/

• Schedule

  Upcoming Talks and Events * TC39 Committee Meeting [www.ecma-international.org/memento/TC39-M.htm], September 27-29, Los Gatos, CA * Ember ATX [http://www.meetup.com/Ember-ATX/], October 18, Austin, TX (Speaker) * RubyConf Portugal [http://rubyconf.pt/], October 27-28, Braga, Portugal (Speaker) * Full Stack Meetup [http://www.meetup.com/fullstack/], November 10, Denver, CO (Speaker) * TC39 Committee Meeting [www.ecma-international.org/memento/TC39-M.htm], Nov 29-Dec 1, San

  2015/5/13 01:17Yehuda Katzhttps://yehudakatz.com/schedule/

• About Me

  Yehuda Katz is passionate about all things Open Source and a believer in the power of standardization. He believes that we can make the most change through earnest efforts to achieve consensus.

  2015/5/13 01:08Yehuda Katzhttps://yehudakatz.com/about/

• Search

  Long-form writing by Yehuda Katz, co-creator of Ember.js and serial Open Sourcerer.

  2015/5/8 19:46Yehuda Katzhttps://yehudakatz.com/search/

• An Extensible Approach to Browser Security Policy

  Alex Russell posted some thoughts today [http://infrequently.org/2013/05/use-case-zero/] about how he wishes the W3C would architect the next version of the Content Security Policy. I agree with Alex that designing CSP as a "library" that uses other browser primitives would increase its long-term utility and make it compose better with other platform features. Alex is advocating the use of extensible web [https://yehudakatz.com/2013/05/21/extend-the-web-forward/] principles in the design of th

  2013/5/24 22:25Yehuda Katzhttps://yehudakatz.com/2013/05/24/an-extensible-approach-to-browser-security-policy/

• Extend the Web Forward

  If we want to move the web forward, we must increase our ability as web developers to extend it with new features. For years, we've grabbed the browsers extension points with two hands, not waiting for the browser vendors to gift us with new features. We built selector engines, a better DOM API, cross-domain requests, cross-frame APIs. When the browser has good extension points (or any extension points, really), we live in a virtuous cycle: * Web developers build new APIs ourselves, based on

  2013/5/21 17:06Yehuda Katzhttps://yehudakatz.com/2013/05/21/extend-the-web-forward/

• I'm Running to Reform the W3C's TAG

  Elections for the W3C's Technical Architecture Group are underway, and I'm running! There are nine candidates for four open seats. Among the nine candidates, Alex Russell, Anne van Kesteren, Peter Linss, and Marcos Cáceres are running on a reform platform. What is the TAG, and what do I mean by reform? What is the TAG? According to the TAG's charter, it has several roles: * to document and build consensus around principles of Web architecture * to interpret and clarify these principles when

  2012/12/8 01:26Yehuda Katzhttps://yehudakatz.com/2012/12/07/im-running-to-reform-the-w3cs-tag/

• Follow Me to Google+

  I wrote my first post on this blog in January 2007. In 2007, this blog was the easiest way I had to write my thoughts down for people who cared to read them. I wrote long [https://yehudakatz.com/2010/05/05/ruby-1-9-encodings-a-primer-and-the-solution-for-rails/] posts [https://yehudakatz.com/2010/05/17/encodings-unabridged/] and short [https://yehudakatz.com/2011/12/12/amber-js-formerly-sproutcore-2-0-is-now-ember-js/] post [https://yehudakatz.com/2010/02/09/using-bundler-in-real-life/] (but

  2012/9/10 23:23Yehuda Katzhttps://yehudakatz.com/2012/09/10/follow-me-to-google/

• August Tokaido Update

  It's been a while since I posted anything on my blog, and I figured I'd catch everyone up on the work I've been doing on Tokaido. Components Tokaido itself is made up of a number of components, which I am working on in parallel: * Ruby binary build, statically compiled * A logging and alerting UI * Remote Notifications for Rails 3+ * Integration with Puma Express * Integration with code quality tools * Resolve bundler issue related to binary builds and deployment to Heroku * Work with c

  2012/8/6 21:48Yehuda Katzhttps://yehudakatz.com/2012/08/06/august-tokaido-update/

• Tokaido Status Update: Implementation Details

  Hey guys! Since my last update, Tokaido was fully funded, and I've been hard at work planning, researching and working on Tokaido. So far, we have a working binary build of Ruby, but no setup chrome. Because the binary build already exists, Terence Lee was able to experiment with it at a recent Rails Girls event, with great success: > Our @hone02 [https://twitter.com/hone02] made such improvements to the installment last night with @wycats [https://twitter.com/wycats] that everyone's done and

  2012/6/5 16:32Yehuda Katzhttps://yehudakatz.com/2012/06/05/tokaido-status-update-implementation-details/

• Tokaido: My Hopes and Dreams

  A few weeks ago, I started a kickstarter project to fund work on a project to make a long-term, sustainable binary build of Ruby. The outpouring of support was great, and I have far exceeded my original funding goal. First, I'd like to thank everyone in the community who contributed large and small donations. This kickstarter couldn't have been as successful as it has been without the hundreds (650 at latest count!) of individual donations by interested Rubyists. In this post, I want to talk ab

  2012/4/13 09:46Yehuda Katzhttps://yehudakatz.com/2012/04/13/tokaido-my-hopes-and-dreams/

• JavaScript Needs Blocks

  While reading Hacker News posts about JavaScript, I often come across the misconception that Ruby's blocks are essentially equivalent to JavaScript's "first class functions". Because the ability to pass functions around, especially when you can create them anonymously, is extremely powerful, the fact that both JavaScript and Ruby have a mechanism to do so makes it natural to assume equivalence. In fact, when people talk about why Ruby's blocks are different from Python's functions, they usually

  2012/1/10 08:36Yehuda Katzhttps://yehudakatz.com/2012/01/10/javascript-needs-blocks/

• Amber.js (formerly SproutCore 2.0) is now Ember.js

  After we announced Amber.js last week, a number of people brought Amber Smalltalk, a Smalltalk implementation written in JavaScript, to our attention. After some communication with the folks behind Amber Smalltalk, we started a discussion on Hacker News [http://news.ycombinator.com/item?id=3335916] about what we should do. Most people told us to stick with Amber.js, but a sizable minority told us to come up with a different name. After thinking about it, we didn't feel good about the conflict a

  2011/12/13 00:51Yehuda Katzhttps://yehudakatz.com/2011/12/12/amber-js-formerly-sproutcore-2-0-is-now-ember-js/

• Announcing Amber.js

  A little over a year ago, I got my first serious glimpse at SproutCore, the JavaScript framework Apple used to build MobileMe (now iCloud). At the time, I had worked extensively with jQuery and Rails on client-side projects, and I had never found the arguments for the "solutions for big apps" very compelling. At the time, most of the arguments (at least within the jQuery community) focused on bringing more object orientation to JavaScript, but I never felt that they offered the layers of abstrac

  2011/12/8 19:32Yehuda Katzhttps://yehudakatz.com/2011/12/08/announcing-amber-js/

• How to Marshal Procs Using Rubinius

  The primary reason I enjoy working with Rubinius is that it exposes, to Ruby, much of the internal machinery that controls the runtime semantics of the language. Further, it exposes that machinery primarily in order to enable user-facing semantics that are typically implemented in the host language (C for MRI, C and C++ for MacRuby, Java for JRuby) to be implemented in Ruby itself. There is, of course, quite a bit of low-level functionality in Rubinius implemented in C++, but a surprising numbe

  2011/11/19 09:11Yehuda Katzhttps://yehudakatz.com/2011/11/19/how-to-marshal-procs-using-rubinius/

• A Proposal for ES.next Proposals

  Over the past few years, I have occasionally expressed frustration (in public and private) about the process for approving new features to the next edition of ECMAScript. In short, the process is extremely academic in nature, and is peppered with inside baseball terms that make it nearly impossible for lay developers to provide feedback about proposed new features. In general, this frustration was met with a general assumption that the current process works the way it does for good reason, and t

  2011/9/13 07:29Yehuda Katzhttps://yehudakatz.com/2011/09/12/a-proposal-for-es-next-proposals/

• New Hope for The Ruby Specification

  For a few years, a group of Japanese academics have been working on formalizing the Ruby programming language into a specification [http://www.ipa.go.jp/osc/english/ruby/Ruby_final_draft_enu_20100825.pdf] they hoped would be accepted by ISO. From time to time, I have read through it, and I had one major concern. Because Ruby 1.9 was still in a lot of flux when they were drafting the specification, the authors left a lot of details out. Unfortunately, some of these details are extremely importan

  2011/9/5 10:00Yehuda Katzhttps://yehudakatz.com/2011/09/05/new-hope-for-the-ruby-specification/

• Understanding "Prototypes" in JavaScript

  For the purposes of this post, I will be talking about JavaScript objects using syntax defined in ECMAScript 5.1. The basic semantics existed in Edition 3, but they were not well exposed. A Whole New Object In JavaScript, objects are pairs of keys and values (in Ruby, this structure is called a Hash; in Python, it's called a dictionary). For example, if I wanted to describe my name, I could have an object with two keys: firstName would point to "Yehuda" and lastName would point to "Katz". Keys

  2011/8/13 02:33Yehuda Katzhttps://yehudakatz.com/2011/08/12/understanding-prototypes-in-javascript/

• Understanding JavaScript Function Invocation and "this"

  Over the years, I've seen a lot of confusion about JavaScript function invocation. In particular, a lot of people have complained that the semantics of this in function invocations is confusing. In my opinion, a lot of this confusion is cleared up by understanding the core function invocation primitive, and then looking at all other ways of invoking a function as sugar on top of that primitive. In fact, this is exactly how the ECMAScript spec thinks about it. In some areas, this post is a simp

  2011/8/11 09:54Yehuda Katzhttps://yehudakatz.com/2011/08/11/understanding-javascript-function-invocation-and-this/

• What's Up With All These Changes in Rails?

  Yesterday, there was a blog post entitled "What the Hell is Happening to Rails" that stayed at the number one spot on Hacker News for quite a while. The post and many (but not most) the comments on the post reflect deep-seated concern about the recent direction of Rails. Others have addressed the core question about change in the framework, but I'd like to address questions about specific changes that came up in the post and comments. The intent of this post is not to nitpick the specific argum

  2011/6/14 20:31Yehuda Katzhttps://yehudakatz.com/2011/06/14/what-the-hell-is-happening-to-rails/

• Using SproutCore 2.0 with jQuery UI

  One of the goals of SproutCore 2.0 is to make it trivial to integrate the tools you're already using together with SproutCore. One way that we do that is to make it possible to drop a SproutCore app into a small part of your existing page. Greg Moeck did a great job demonstrating this functionality on the SproutCore Blog [http://blog.sproutcore.com/dispatches-from-the-edge-dropping-in-a-sproutcore-2-0-application/] a couple of weeks ago, and I'd definitely recommend checking it out if you're i

  2011/6/11 21:49Yehuda Katzhttps://yehudakatz.com/2011/06/11/using-sproutcore-2-0-with-jquery-ui/

• Gem Versioning and Bundler: Doing it Right

  Recently, an upgrade to Rake (from version 0.8.7 to version 0.9.0) has re-raised the issue of dependencies and versioning in the Ruby community. I wanted to take the opportunity to reiterate some of the things I talked about back when working on Bundler 1.0. First, I'll lay out some basic rules for the road, and then go into some detail about the rationale. Basic Versioning Rules for Apps 1. After bundling, always check your Gemfile.lock into version control. If you do this, you do not nee

  2011/5/30 10:18Yehuda Katzhttps://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/

• Getting Comfortable With Rubinius' Pure-Ruby Internals

  You probably know that Rubinius is a Ruby whose implementation is mostly written in Ruby. While that sounds nice in theory, you may not know what that means in practice. Over the past several years, I've contributed on and off to Rubinius, and feel that as Rubinius has matured since the 1.0 release, a lot of its promise has gelled. One of the great things about Rubinius is that it exposes, as first-class concepts, a lot of things that are merely implicit in other Ruby implementations. For insta

  2011/2/19 03:08Yehuda Katzhttps://yehudakatz.com/2011/02/18/getting-comfortable-with-rubinius-pure-ruby-internals/

• Clarifying the Roles of the .gemspec and Gemfile

  TL;DR Although apps and gems look like they share the concept of "dependency", there are some important differences between them. Gems depend on a name and version range, and intentionally don't care about where exactly the dependencies come from. Apps have more controlled deployments, and need a guarantee that the exact same code is used on all machines (dev, ci and production). When developing a gem, use the gemspec [http://gembundler.com/rubygems.html] method in your Gemfile to avoid duplic

  2010/12/17 05:41Yehuda Katzhttps://yehudakatz.com/2010/12/16/clarifying-the-roles-of-the-gemspec-and-gemfile/

• Ruby 2.0 Refinements in Practice

  First Shugo announced them at RubyKaigi. Then Matz showed some improved syntax at RubyConf. But what are refinements [http://redmine.ruby-lang.org/issues/show/4085] all about, and what would they be used for? The first thing you need to understand is that the purpose of refinements in Ruby 2.0 is to make monkey-patching safer. Specifically, the goal is to make it possible to extend core classes, but to limit the effect of those extensions to a particular area of code. Since the purpose of this

  2010/11/30 11:25Yehuda Katzhttps://yehudakatz.com/2010/11/30/ruby-2-0-refinements-in-practice/

• What's Wrong with "HTML5"

  In the past year or so, the term "HTML5" has increasingly been picked up by the tech press as the successor to "DHTML", "Web 2.0" or "Ajax". When used by the tech press, it is becoming a generic term for "the next generation of web technology", except that the term "HTML5" is less precise than even that. Consider the first paragraph of an article about HTML [http://erictric.com/2010/10/07/w3c-says-html5-is-not-ready-for-production-yet/] published this week: > HTML5 is the hot topic nowadays.

  2010/10/7 21:28Yehuda Katzhttps://yehudakatz.com/2010/10/07/whats-wrong-with-html5/

• Bundler: As Simple as What You Did Before

  One thing we hear a lot by people who start to use bundler is that the workflow is more complicated than it used to be when they first start. Here's one (anonymized) example: "Trying out Bundler to package my gems. Still of the opinion its over-complicating a relatively simple concept, I just want to install gems." Bundler has a lot of advanced features, and it's definitely possible to model fairly complex workflows. However, we designed the simple case to be extremely simple, and to usually be

  2010/10/1 06:28Yehuda Katzhttps://yehudakatz.com/2010/09/30/bundler-as-simple-as-what-you-did-before/

• Here's to the Next 3 Years

  I officially joined Engine Yard on January 1, 2008, about a week before we announced our Series A funding, becoming its twenty-second employee. I was Engine Yard's very first "Engineering" hire, and I would spend the next year working on Ezra's Merb project, finally releasing Merb 1.0 at MerbCamp that October. When I joined Engine Yard, I had already been working on the jQuery project for a couple years, having started visualjquery.com [http://visualjquery.com/] at a time in jQuery's history be

  2010/9/14 23:58Yehuda Katzhttps://yehudakatz.com/2010/09/14/heres-to-the-next-3-years/

• Announcing Handlebars.js

  For a number of years, I've been about as active in client-side development (through jQuery) as I have been active in server-side development (through Merb and then Rails). Recently, I've released a couple of libraries (jQuery Offline [http://github.com/wycats/jquery-offline] and Rack::Offline [http://github.com/wycats/rack-offline]), designed to make it easier to build applications that can withstand both flaky connections and a complete lack of connectivity. Of course, those libraries leverage

  2010/9/10 02:38Yehuda Katzhttps://yehudakatz.com/2010/09/09/announcing-handlebars-js/