Subject: [xsl] Thoughts about the "Asynchronous XSLT" From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Sat, 1 Aug 2020 03:08:43 -0000 |
First of all, congratulations to the Balisage organizers for organizing this conference even in the current situation. I read Dr. Kay's paper "Asynchronous XSLT" from the proceedings of Balisage-2020: https://www.balisage.net/Proceedings/vol25/html/Kay01/BalisageVol25-Kay01.html While the described new feature (promises) is impressive and will be a step in the right direction, people who have used both promises and reactive extensions (RxJs in particular, a Javascript implementation of Reactive Extensions: http://reactivex.io <http://reactivex.io/languages.html> ) point out certain advantages of using Rx observables over promises: - Promises produce only one event; Observables produce a stream of events. - Promises are not lazy; Observables do not fire even after being created, they start emitting the event stream only upon subscription. - Working with nested and interdependent promises can be cumbersome and unwieldy; Much easier and structured when expressed and handled with observables. - Promises, once started, cannot be cancelled; Observables were designed having cancellation in mind. - Shall we mention multicasting ... Here is a brief video that shows this in running code: https://egghead.io/lessons/rxjs-rxjs-observables-vs-promises The reason for my message is that it is still not too late to make an informed design decision that takes into consideration the established best approach towards implementing the handling of asynchrony in almost all major programming languages, and, to have a written evidence that this problem had at least been raised and (hopefully) discussed. To quote http://reactivex.io/languages.html , Rx has been implemented in these languages, platforms and frameworks: Languages - Java: RxJava <https://github.com/ReactiveX/RxJava> - JavaScript: RxJS <https://github.com/ReactiveX/rxjs> - C#: Rx.NET <https://github.com/Reactive-Extensions/Rx.NET> - C#(Unity): UniRx <https://github.com/neuecc/UniRx> - Scala: RxScala <https://github.com/ReactiveX/RxScala> - Clojure: RxClojure <https://github.com/ReactiveX/RxClojure> - C++: RxCpp <https://github.com/Reactive-Extensions/RxCpp> - Lua: RxLua <https://github.com/bjornbytes/RxLua> - Ruby: Rx.rb <https://github.com/Reactive-Extensions/Rx.rb> - Python: RxPY <https://github.com/ReactiveX/RxPY> - Go: RxGo <https://github.com/ReactiveX/RxGo> - Groovy: RxGroovy <https://github.com/ReactiveX/RxGroovy> - JRuby: RxJRuby <https://github.com/ReactiveX/RxJRuby> - Kotlin: RxKotlin <https://github.com/ReactiveX/RxKotlin> - Swift: RxSwift <https://github.com/kzaher/RxSwift> - PHP: RxPHP <https://github.com/ReactiveX/RxPHP> - Elixir: reaxive <https://github.com/alfert/reaxive> - Dart: RxDart <https://github.com/ReactiveX/rxdart> ReactiveX for platforms and frameworks - RxNetty <https://github.com/ReactiveX/RxNetty> - RxAndroid <https://github.com/ReactiveX/RxAndroid> - RxCocoa <https://github.com/kzaher/RxSwift> . Why don't we make XSLT part of this large family, where all developers already know, use and understand the functions and operators, and will be able with minimum effort to also use the same in XPath/XSLT? Or is this really challenging because of existing inherent problems in XSLT? -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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