In this video we are going to run a thought experiment: "What if your code compiled only if it was in the right place?". Export Java Symbols compiles, but fails at runtime with NoClassDefFoundError. https://github.com/lampepfl/dotty/issues/12249 Table of Contents: 00:00 Intro 02:03 Project setup 02:53 Packages vs Namespaces 04:19 Top Level Definitions 09:54 Top Level Exports 14:02 The forced caked pattern 20:26 Why I prefer namespaces 22:03 Top Level Exports vs Package objects 23:05 Export Java terms bug https://github.com/lampepfl/dotty/issues/12249 24:33 Real Project Demo 35:54 Location Oriented Programming 37:45 Real Project Demo (continued) Website: https://devinsideyou.com Patreon: https://patreon.devinsideyou.com Discord: https://discord.devinsideyou.com Telegram: https://telegram.devinsideyou.com Twitter: https://twitter.devinsideyou.com GitHub: https://github.devinsideyou.com LBRY: https://lbry.devinsideyou.com Install scripts: https://install.devinsideyou.com Giter8 templates: https://g8.devinsideyou.com Spotify concentration playlist: https://code.radio.devinsideyou.com Cheers and Happy Coding! #scala #tutorial #programming ... https://www.youtube.com/watch?v=dh61X4GZmvg

In this video we are going to learn about models of computation and why they matter. We will quickly walk through the most prominent models and in the next video we will look at two of them in depth. The models discussed in this video are: substitution (with both applicative- and normal-order evaluation), environment and stream-processing. We also take a glimpse at thread-based as well as event-based concurrency models and even mention the actor model of computation. Structure and Interpretation of Computer Programs: https://mitpress.mit.edu/sicp/ Website: https://devinsideyou.com Patreon: https://patreon.devinsideyou.com Discord: https://discord.devinsideyou.com Twitter: https://twitter.devinsideyou.com Github: https://github.devinsideyou.com Install scripts: https://install.devinsideyou.com Giter8 templates: https://g8.devinsideyou.com Spotify concentration playlist: https://code.radio.devinsideyou.com Cheers and Happy Coding! #SICP ... https://www.youtube.com/watch?v=tktx7itTB3k

In this video we are going to see a lot of different ways to encode opaque types in Scala including a library called NewType. We will also see support for opaque types in Scala 3. Scala NewType: https://github.com/estatico/scala-newtype Haskell Newtype: https://wiki.haskell.org/Newtype A simple trick to improve type safety of your Scala code (the blog post that I mentioned): https://blog.softwaremill.com/a-simple-trick-to-improve-type-safety-of-your-scala-code-ba80559ca092 Practical Functional Programming in Scala (the book that I mentioned): https://leanpub.com/pfp-scala Value Classes in Scala (AnyVal): https://docs.scala-lang.org/overviews/core/value-classes.html Table of Contents: 00:00 introduction 01:50 the type safety problem 02:58 wrappers to the rescue 04:28 the performance/latency problem 05:22 AnyVal 08:38 Tagged Types 15:43 https://github.com/estatico/scala-newtype 25:36 cats integration 27:44 refined integration 31:13 circe integration 33:57 Coercible 43:38 map extension 45:34 opaque type aliases in Scala3 Website: https://devinsideyou.com Patreon: https://patreon.devinsideyou.com Discord: https://discord.devinsideyou.com Twitter: https://twitter.devinsideyou.com Github: https://github.devinsideyou.com LBRY: https://lbry.devinsideyou.com Install scripts: https://install.devinsideyou.com Giter8 templates: https://g8.devinsideyou.com Spotify concentration playlist: https://code.radio.devinsideyou.com Cheers and Happy Coding! #NewType #tutorial ... https://www.youtube.com/watch?v=WyvawRRuU2c

In this video we will discuss all the possible ways to handle errors in Scala. It is mostly focused on exceptions, but also covers other interesting Techniques like Option, Either, Try, util.control.Exception.catch and friends, home baked types, external libraries and many other things. Most importantly it provides some guidance for when to use which technique. This video got too long so it is split into 2 parts. The throwable API is here: https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html The scala.util.control.Exception API is here: https://www.scala-lang.org/api/2.12.4/scala/util/control/Exception$.html The scala.util.control.NonFatal API is here: https://github.com/scala/scala/blob/v2.12.4/src/library/scala/util/control/NonFatal.scala The scalactic library is here: http://www.scalactic.org/ This video is part of the following playlist: https://www.youtube.com/playlist?list=PLJGDHERh23x-YBJ8LmYU_IGBFflvsKfLu Website: https://devinsideyou.com Patreon: https://patreon.devinsideyou.com Discord: https://discord.devinsideyou.com Twitter: https://twitter.devinsideyou.com Github: https://github.devinsideyou.com Install scripts: https://install.devinsideyou.com Giter8 templates: https://g8.devinsideyou.com Spotify concentration playlist: https://code.radio.devinsideyou.com Cheers and Happy Coding! #Exception #tutorial ... https://www.youtube.com/watch?v=oOj7rfoDzJ0