450 Matching Annotations
  1. Sep 2021
  2. Aug 2021
    1. function strictIsDog<T extends Dog extends T ? unknown : never>( // like <T super Dog> candidate: Dog | T // if Dog extends T then Dog | T is T ): candidate is Dog { // compiler recognizes that Dog | T can narrow to T return "bark" in candidate; } if (strictIsDog(animal)) {} // okay if (strictIsDog(dog)) {} // okay if (strictIsDog(mixed)) {} // okay if (strictIsDog(cat)) {} // error! // ~~~ <-- Cat is not assignable to Dog
  3. Jun 2021
    1. We should think about the number of simultaneous connections (peak and average) and the message rate/payload size. I think, the threshold to start thinking about AnyCable (instead of just Action Cable) is somewhere between 500 and 1000 connections on average or 5k-10k during peak hours.
      • number of simultaneous connections (peak and average)

      • the message rate/payload size.

    1. One of the consequences (although arguably not the primary motivation) of DRY is that you tend to end up with chunks of complex code expressed once, with simpler code referencing it throughout the codebase. I can't speak for anyone else, but I consider it a win if I can reduce repetition and tuck it away in some framework or initialisation code. Having a single accessor definition for a commonly used accessor makes me happy - and the new Object class code can be tested to hell and back. The upshot is more beautiful, readable code.

      new tag?:

      • extract reusable functions to reduce duplication / allow elegant patterns elsewhere
    1. Critical to the acceptance of the position of the script subtag was the inclusion of information in the registry to make clear the need to avoid script subtags except where they add useful distinguishing information. Thus, the registry entry for the language subtag "en" (English) has a field called "Suppress-Script" indicating that the script subtag "Latn" should be avoided with that language, since virtually all English documents use the Latin script.
      • not worth saying
      • not necessary to say/write
      • useless information

      Suppress-Script

  4. May 2021
    1. First of all, I would start off presenting yourself: Dear XYZ support team I am the web developer in charge of example.com website. By presenting you this way, you are establishing the frame to treat you, hinting that you should be presupposed to be somewhat proficient, so they could choose to answer in a more technical detail.
    2. Hey, I'm a PhD in [field] and do [whatever] professionally. Before calling you, I've narrowed down the problem to [something on their end], so that's what needs to be addressed. If I could speak to an engineer about [specific problem], that'd be great; but if we've gotta walk through the script, let's just knock it out quickly. If they end up requiring the script, then the best way to use your expertise is to run through it quickly. Keep the chit-chat to a minimum and just do the stuff efficiently. If they start describing how to perform some step, you might interrupt them with, "Got it, just a sec.", then let them know once you're ready for the next step.
    3. OP is referring to letting people know they can speak like proper adults when talking about technical terms, without going through the usual nanny-like discourse that tech support has to provide to non-techies. For instance, it happened to me with Amazon support. The speaker told me exactly where to touch in order to clear the cache of the Android Amazon App Store. Given that I work as an app developer the guy could have just said "please clear the cache". No need to go through "tap here, then here, now you should see this, tap that"...
    1. My name is Floyd Lu, I have been designing and publishing games since 2015 under B&B Games studio. In 2020 B&B Games studio dissolved. I took over a part of the business including this account. I am unable to change the name and URL of my Kickstarter account. I delivered and personally worked on each project that I did and I can't transfer all the followers, therefore, I am still launching new projects under this account.
    1. when HTML5 started, the feedback from the HTML5 guys was pretty clear: HTML5 is there to improve web apps (standards-based flash! yay!), and not to improve HTML as a hypermedia format. http://dret.typepad.com/dretblog/2008/05/xhtml-fragment.html was a very early attempt to raise the issue and was shot down promptly. with HTML5 now branching into so many micro-specs (https://github.com/dret/HTML5-overview), maybe there’s a good chance to simply create a “FragIDs in HTML5” spec and see if there’s any community uptake. it would be great to see this getting started, and maybe IETF with its more open process would be a better place than W3C.
    2. The simple problem that I see with fragment identifiers is that their existence and functionality relies completely on the developer rather than the browser. Yes, the browser needs to read and interpret the identifier and identify the matching fragment. But if the developer doesn’t include any id attributes in the HTML of the page, then there will be no identifiable fragments. Do you see why this is a problem? Whether the developer has coded identifiers into the HTML has nothing to do with whether or not the page actually has fragments. Virtually every web page has fragments. In fact, sectioning content as defined in the HTML5 spec implies as much. Every element on the page that can contain content can theoretically be categorized as a “fragment”.

      at the mercy of author

    1. Approaching email development this way transitions more of the quality assurance (QA) process to the browser instead of the email client. It gives email designers more power, control, and confidence in developing an email that will render gracefully across all email clients.

      can mostly test with browser and have less need (but still not no need) to test with email client

  5. Apr 2021
    1. There's nothing to stop you from doing initializer code in a file that lives in app/models. for example class MyClass def self.run_me_when_the_class_is_loaded end end MyClass.run_me_when_the_class_is_loaded MyClass.run_me... will run when the class is loaded .... which is what we want, right? Not sure if its the Rails way.... but its extremely straightforward, and does not depend on the shifting winds of Rails.

      does not depend on the shifting winds of Rails.

    1. What you want is not to detect if stdin is a pipe, but if stdin/stdout is a terminal.

      The OP wasn't wrong in exactly the way this comment implies: he didn't just ask how to detect whether stdin is a pipe. The OP actaully asked how to detect whether it is a terminal or a pipe. The only mistake he made, then, was in assuming those were the only two possible alternatives, when in fact there is (apparently) a 3rd one: that stdin is redirected from a file (not sure why the OS would need to treat that any differently from a pipe/stream but apparently it does).

      This omission is answered/corrected more clearly here:

      stdin can be a pipe or redirected from a file. Better to check if it is interactive than to check if it is not.

    1. By the way, the README file of the expect says there is a libexpect library that can be used to write programs on C/C++ which allows to avoid the use of TCL itself. But I'm afraid, this subject is beyond this article. Besides authors of expect themselves seem to prefer expect-scripts to the library.

      possible but doesn't seem preferred

      looking at what the authors themselves use

    1. TTY is right there in the name, but this article makes no attempt to clarify what exactly the relationship between a pseudoterminal and a TTY. I feel like a whole paragraph about the relation to TTY would be warranted, including a link to TTY article, of course, which does link [back] to and explain some of the relation to pseudoterminal:

      In many computing contexts, "TTY" has become the name for any text terminal, such as an external console device, a user dialing into the system on a modem on a serial port device, a printing or graphical computer terminal on a computer's serial port or the RS-232 port on a USB-to-RS-232 converter attached to a computer's USB port, or even a terminal emulator application in the window system using a pseudoterminal device.

    1. Although echo "$@" prints the arguments with spaces in between, that's due to echo: it prints its arguments with spaces as separators.

      due to echo adding the spaces, not due to the spaces already being present

      Tag: not so much:

      whose responsibility is it? but more: what handles this / where does it come from? (how exactly should I word it?)

    1. There is a tendency in short luck-heavy games to require you to play multiple rounds in one sitting, to balance the scores. This is one such game. This multiple-rounds "mechanic" feels like an artificial fix for the problem of luck. Saboteur 1 and 2 advise the same thing because the different roles in the game are not balanced. ("Oh, well. I had the bad luck to draw the Profiteer character this time. Maybe I'll I'll draw a more useful character in round 2.") This doesn't change the fact that you are really playing a series of short unbalanced games. Scores will probably even out... statistically speaking. The Lost Cities card game tries to deal with the luck-problem in the same way.

      possibly rename: games: luck: managing/mitigating the luck to games: luck: dealing with/mitigating the luck problem

  6. Mar 2021
    1. As to opinions about the shortcomings of the language itself, or the standard run-times, it’s important to realize that every developer has a different background, different experience, different needs, temperament, values, and a slew of other cultural motivations and concerns — individual opinions will always be largely personal and, to some degree, non-technical in nature.
    1. I don't understand why this isn't being considered a bigger deal by maintainrs/the community. Don't most Rails developers use SCSS? It's included by default in a new Rails app. Along with sprockets 4. I am mystified how anyone is managing to debug CSS in Rails at all these days, that this issue is being ignored makes sprockets seem like abandonware to me, or makes me wonder if nobody else is using sprockets 4, or what!
    1. we used `backticks` to jump into native Javascript to use moment.js

      In regular Ruby, `` executes in a shell, but obviously there is no shell of that sort in JS, so it makes sense that they could (and should) repurpose that syntax for something that makes sense in context of JS -- like running native JavaScript -- prefect!

  7. Feb 2021
    1. So, the sad conclusion is: all problems must be resolved individually depending on a specific usage context. There’s no silver bullet to resolve all ZeroDivisionErrors once and for all. And again, I am not even covering complex IO flows with retry policies and expotential timeouts.
    1. Though rarer in computer science, one can use category theory directly, which defines a monad as a functor with two additional natural transformations. So to begin, a structure requires a higher-order function (or "functional") named map to qualify as a functor:

      rare in computer science using category theory directly in computer science What other areas of math can be used / are rare to use directly in computer science?

    1. note that TRB source code modifications are not proprietary

      In other words, you can build on this software in your proprietary software but can't change the Trailblazer source unless you're willing to contribute it back.

      loophole: I wonder if this will actually just push people to move their code -- which at the core is/would be a direction modification to the source code - out to a separate module. That's so easy to do with Ruby, so this restriction hardly seems like it would have any effect on encouraging contributions.

    1. The reason Reform does updating attributes and validation in the same step is because I wanna reduce public methods. This is to save users from having to remember state.

      I see what he means, but what would you call this (tag)? "have to remember state"? maybe "have to remember" is close enough

      Or maybe order is important / do things in the right order is all we need to describe the problem/need.

  8. Jan 2021
    1. Please don't thank me! ;-) If this answer did help, just click the little grey ☑ at the left of this text right now turning it into beautiful green. If you do not like the answer, click on the little grey down-arrow below the number, and if you really like the answer, click on the little grey ☑ and the little up-arrow... If you have any further questions, just ask another one! ;-)

      How would you even describe this comment?

      "just doing my job"? but he is (I assume) answering to be nice not because it's his job

      "I won't take it personally"? vote my answer up or down, whichever you please

      impartial, dispassionate, and objective, perhaps? "just the facts, ma'am"


      Separately, what is the "Please don't thank me!" for? Is it that politeness? False modesty? Genuine modesty? Or is it rude? Why not allow someone to thank you??

  9. Dec 2020
    1. They say that perfect is the enemy of good, and I'm coming to realise that something like a video course can never be perfect anyway. I can only do my best with the time and energy I have available. I'd rather finish this course and share my experience and insights on using Svelte with the world, than to plan it forever and never launch.
    1. Some devs prefer Svelte’s minimal approach that defers problems to userland, encouraging more innovation, choice, and fragmentation, and other devs prefer a more fully integrated toolkit with a well-supported happy path.

      tag?: what scope of provided features / recommended happy path is needed?

    2. It’s worth mentioning that Svelte limits its scope to being only a UI component framework. Like React, it provides the view layer, but it has more batteries included with its component-scoped CSS and extensible stores for state management. Others like Angular and Vue provide a more all-in-one solution with official routers, opinionated state management, CLIs, and more. Sapper is Svelte’s official app framework that adds routing, server-side rendering, code splitting, and some other essential app features, but it has no opinions about state management and beyond. Some devs prefer Svelte’s minimal approach that defers problems to userland, encouraging more innovation, choice, and fragmentation, and other devs prefer a more fully integrated toolkit with a well-supported happy path.

      tag?: what scope of provided features / recommended happy path is needed?

    3. With the caveat that hero worship can be gross, distorting, and unhelpful to everyone involved, Svelte author Rich Harris (@rich_harris on Twitter) is one of my favorite open source developers. In the JS community he’s well-known among tool authors for spreading interesting ideas. He’s the creator of many open source projects including Rollup, the bundler of choice for many libraries including React and Vue.
    4. The compiler architecture moves complexity from the runtime and source code to buildtime and tools. Behind Svelte’s simple APIs sits a beefy compiler. Frontend web development has become very tool heavy in the webapp era, so in practice this adds little cost beyond what developers like myself already pay, but increased build complexity is important to acknowledge.

      tool-heavy dependence on build tools / heavy/complex build-time

  10. Nov 2020
    1. (15x) ENJOYMENT: Forgettable Outstanding(10x) DEPTH (IN RELATION TO COMPLEXITY): Lacking Meaty (5x) LUCK FACTOR: All Luck All Skill (3x) REPLAYABILITY: Nil Limitless(10x) MECHANICS: Boring Interesting (4x) PLAYER INTERACTION: Low High (4x) PLAYER COUNT PERFORMANCE: Not Balanced Balanced (2x) GAME LENGTH: Too Short/Long Just Right (2x) CLARITY OF RULES: Mud Crystal (5x) COMPONENT QUALITY: Cheap World ClassINITIAL RATING (sum(Criteria Rating x Criteria Weight)/Total Weight) = 7.7

      rating scale evaluation

  11. Oct 2020
    1. Form validation can get complex (synchronous validations, asynchronous validations, record validations, field validations, internationalization, schemas definitions...). To cope with these challenges we will leverage this into Fonk and Fonk Final Form adaptor for a React Final Form seamless integration.
    1. Doing so also means adding empty import statements to guarantee correct order of evaluation of modules (in ES modules, evaluation order is determined statically by the order of import declarations, whereas in CommonJS – and environments that simulate CommonJS by shipping a module loader, i.e. Browserify and Webpack – evaluation order is determined at runtime by the order in which require statements are encountered).

      Here: dynamic loading (libraries/functions) meaning: at run time

    1. The primary motivation behind virtual-dom is to allow us to write code independent of previous state. So when our application state changes we will generate a new VTree. The diff function creates a set of DOM patches that, based on the difference between the previous VTree and the current VTree, will update the previous DOM tree to match the new VTree.

      annotation meta: may need new tag: for: "code independent of previous state."

      annotation meta: may need new tag: for: diffs other than source/text code diffs (in this case diffs between virtual DOM trees)

    1. This is valid javascript! Or harmony or es6 or whatever, but importantly, it's not happening outside the js environment. This also allows us to use our standard tooling: the traceur compiler knows how to turn jsx`<div>Hello</div>`; into the equivalent browser compatible es3, and hence we can use anything the traceur compile accepts!
  12. Sep 2020
    1. The more I think about this, the more I think that maybe React already has the right solution to this particular issue, and we're tying ourselves in knots trying to avoid unnecessary re-rendering. Basically, this JSX... <Foo {...a} b={1} {...c} d={2}/> ...translates to this JS: React.createElement(Foo, _extends({}, a, { b: 1 }, c, { d: 2 })); If we did the same thing (i.e. bail out of the optimisation allowed by knowing the attribute names ahead of time), our lives would get a lot simpler, and the performance characteristics would be pretty similar in all but somewhat contrived scenarios, I think. (It'll still be faster than React, anyway!)
  13. Aug 2020
    1. The idea of having to learn something new is good, and I agree with that, but how often should you do that? Looking at the world of JavaScript, a new idea, blog post, library, framework, and whatnot pops up very often. Things become trending, and people quickly try to adopt that. I’m not saying you should not adopt new things and consider different approaches to a solution, not at all! I am trying to propose the idea of doing that less often.
  14. Jul 2020
    1. Matz, alas, I cannot offer one. You see, Ruby--coding generally--is just a hobby for me. I spend a fair bit of time answering Ruby questions on SO and would have reached for this method on many occasions had it been available. Perhaps readers with development experience (everybody but me?) could reflect on whether this method would have been useful in projects they've worked on.
  15. Jun 2020
    1. What would be nice is if JavaScript had a built-in way to do what I can do in Ruby with:

      > I18n.interpolate('Hi, %{name}', name: 'Fred')
      => "Hi, Fred"
      

      But to be fair, I18n comes from i18n library, so JS could just as easily (and I'm sure does) have a library that does the same thing.

      Update: Actually, you can do this in plain Ruby (so why do we even need I18n.interpolate?):

      main > "Hi, %{name}" % {name: 'Fred'}
      => "Hi, Fred"
      
      main > ? String#%
      
      From: string.c (C Method):
      Owner: String
      Visibility: public
      Signature: %(arg1)
      Number of lines: 9
      
      Format---Uses str as a format specification, and returns the result
      of applying it to arg. If the format specification contains more than
      one substitution, then arg must be an Array or Hash
      containing the values to be substituted. See Kernel::sprintf for
      details of the format string.
      
         "%05d" % 123                              #=> "00123"
         "%-5s: %016x" % [ "ID", self.object_id ]  #=> "ID   : 00002b054ec93168"
         "foo = %{foo}" % { :foo => 'bar' }        #=> "foo = bar"
      

      I guess that built-in version is fine for simple cases. You only need to use I18n.translate if you need its more advanced features like I18n.config.missing_interpolation_argument_handler.