Scala.js & friends: SCALA ALL THE THINGS
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Scala.js can compile Scala code to JavaScript, allowing Scala code to run in browsers. The presenter ported a Node.js application called Nightwatch to Scala.js to see how it works. They encountered some obstacles like obscure bugs and difficulty switching between Scala and JavaScript contexts. While Scala.js provided some benefits like type safety and pattern matching, it also required more lines of code and time compared to the original JavaScript version. The presenter also looked at ScalaCSS for CSS but found it undocumented and difficult to use. They concluded Scala.js may not be worth it to replace JavaScript, and other tools like Sass are better for CSS than ScalaCSS. Scalat
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Installation bracket design is superb , thanks to structural engineer and fabrication team for such a wonderful monument or we can say engineering marvel. i can understand the intricasy of the work. Inside glass used is low iron extra clear glass , i have personally the glass factory i.e. golden glass factory.
Impressive Regard
Vinay Srivastava
+91 9167970160
Installation techniques 07
This is a presentation we prepared for our client Elval Colour. It explains graphically their new ventilated facade system and a step by step installation guide.
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Industrialised Building System report,
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XSPlatforms - Facade Access Equipment
Custom facade maintenance systems – for an impeccable appearance
With the facade maintenance solutions from XSPlatforms, you not only choose for quality and functional innovation, but also for convenience and safety. You can also rest assured that the appearance of the building remains intact: our engineers base their designs on the creative vision of the building architect.
From compact, space-saving solutions to the largest roof trolley in the world, gondolas that provide users with maximum protection from the elements, wireless communication between the gondola and roof trolley and even advanced monitoring with PLC technology - XSPlatforms guarantees the most innovative and best available solutions on the market. And all our products are produced from durable materials to ensure a long life and meet all national and international safety standards.
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Uk Data Centre Cleaning commercial cleaning technicians have a reputation for being highly professional, pleasant and very efficient in the way they perform their duties.
industrialised building systems_achah
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Scala.js & friends: SCALA ALL THE THINGS
- 1. Scala.js & friends SCALA ALL THE THINGS Chris Birchall Content API team
- 2. Nightwatch
- 3. Nightwatch: a perfectly good app ● Node.js + Server Sent Events ● Concise, well written JavaScript ● Reliable ● Only one problem…
- 5. Scala.js to the rescue ● Compile Scala code to JS ○ Implemented as a compiler plugin ● Supports almost any Scala code ● Interop with 3rd-party JS libs ○ (with a bit of boilerplate) ● Generated JS size is not outrageous ○ Hello world is about 100k Credit: scala-js.org
- 6. Hello world in 2 slides
- 7. Hello world in 2 slides
- 9. 3rd-party JS interop ● Use js.Dynamic ○ i.e. throw type safety out of the window ○ Quick to write, feels like writing normal JS ● Write a Scala facade for your JS lib ○ Typesafe, assuming the facade matches the JS
- 10. js.Dynamic
- 11. Scala facade
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- 13. Scala.js-ifying Nightwatch ● Untyped hashes → case classes ● Scala facades for moment.js, Rickshaw ● JS if/else chains → Scala pattern matching ● uPickle for JSON deserialization
- 14. Scala.js-ifying Nightwatch Before 106 lines of JS After 216 lines of Scala Facades Case classes
- 15. Chained if/else -> pattern match Before After
- 16. Problems along the way ● Obscure Scala.js bugs ○ e.g. .className doesn’t work sometimes ● Unexpected uPickle behaviour ● Trial and error getting facades to work ○ Gave up and settled on facade + Dynamic hybrid ● Brainmelt from Scala/JS context switching ○ e.g. trying to write Scala strings with single quotes (All in all, > 5 hours to port 100 lines of code)
- 17. Credit: The Atlantic Result: Kinda sorta typesafe JavaScript!
- 18. Hang on a sec What’s this? CSS? But...
- 20. ScalaCSS to the rescue? Erm, no. DSL is virtually undocumented Gave up after a bit of fruitless trial and error. Not quite ready for primetime.
- 21. On to the next victim
- 24. Conclusions Should I use Scala to replace my ... JavaScript Probably not. Boilerplate and bugs outweigh type safety benefits. CSS Nope. Just use Sass like everyone else. HTML Maybe. Scalatags could be useful as a templating lang, to replace e.g. Scalate