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Just a quick one this week

• Jeroen Leenarts • Episode 56

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Jeroen Leenarts:

Hi and welcome to the 56th episode of my podcast. In this episode, we're going to talk about checking if swift UI view is in preview, how to make a Mapquest menu bar app async few asynchronous loading operations in Swift UI. Composition first inheritance code architecture solutions explains the Swift building a blockchain is swift, and Danish Monday morning sweet. So let's get started. Some US holidays are approaching us quickly. And I just wanted to jump into that feast as well. So Happy Thanksgiving, everybody, and have a turkey sandwich on me. So if you use the promo code, Turkey sale 2021 on my Gumroad page, you will get a 50% discount on my book. link is also in the show notes. So you don't have to enter the discount code manually. Because I'm a little bit time constraints, I'm going to dive into this week's article right away. So the first article is checking if a swift UI view is in preview. Shift UI preview is a fantastic piece of development tooling to quickly iterate UI designs in expert, but sometimes to code in your view just doesn't work or worse, it crashes to preview action. How can you work around this issue Rokkor, in his article, ran into a couple issues with Xcode preview. And he looked into what things you can do to make sure that your Xcode swift UI preview isn't crashing. It's a nice overview of some tricks and things that you can do to make sure that your Swift UI view in preview is not using all the aspects of your normal runtime, but that it has like a constrained environment and also how some issues are easily debuggable. Industry software preview saloon has an article on how to make a Mapquest menu bar app. Why am I including a Mac OS article in this week's episodes, this is actually something that I use myself. And I wish I had saloons article to just point me in the right direction from the get go. Sometimes you just want to have a little bit of logic. And up to a certain point I was just playing like command line utilities for written in Swift. But if you use a macro as menu bar app, you can take the same concepts and make it very convenient to do quick actions that are available in the Mac OS menu bar. And this allows you to to just have a quick utility available at a moment's notice. If you ever have some sort of tooling that does these kinds of things. It's also a little fun introduction to some aspects of Mac OS development. And, yeah, all in all, it's pretty much the same as UI Kit developments with a lot of different API and a lot of caveats that you need to take into account. But in general, this article is a nice intro on how you can create one of the small icons in your menu bar on Mac OS. The next article is by Rolf Ebert async few asynchronous loading operations in Swift UI. In his tutorial, a swift UI view component is developed for handling in progress and error states when loading data asynchronously based on exam projects at large JSON data via async await. It's an exercise in creating abstractions and using Swift generics in practice, it's a really nice article with some nice looking artwork in there as well. And what's really fun about Ralph's tutorial is that it's a really nice example of what was just discussed handling in progress aerostats using async await, and using some extra abstractions on top of all these things, with some swift generics to make a very convenient little API that that you can reuse again and again, and so on finally, has written an article on a little bit of architecture, when you should use composition and when you should use inheritance in your code. And he explains these concepts with some code samples. So inheritance, obviously, is a subclass of superclasses. Antoine goes into more depth than that. And what is Composition Composition comes down to combining multiple parts to create a new outcome. So this is also a nice thing that you can use in practice. The goal of Anton's article is to explain what these two things do and how you can implement them in Swift. And it's just a nice reminder of this aspects of software development. If you're using an object oriented language of course, that you should consider composition and inheritance very consciously to make sure that you use the right approach for the right situation. Philippa cherry has written a simple proof of work blockchain inspired by built Bitcoin and it's built in Swift, so keyword heavy thing here, but if you want to get into some basics of blockchain type thinking, it's it's a nice start off A series of articles that gives you an overview of how blockchain could work. I don't think that the code is as robust as as Bitcoin, just due to the fact that not as many eyeballs have had a look at this implementation by Philippi. But it's a nice thought exercise to get some insight into concepts that are related to blockchain technology, because it's, it's something people really talk about a lot. And it was an interesting read. And there's some fun bits of code in the articles by Philippe. Donnie wish everybody Happy Monday, of course, on Twitter, as he does every week. And the first person responding is CRISPR. Sally is doing a new hongo pro Black Friday sale. And the hongo is an app that helps you translate Japanese language on the fly, if you see it somewhere in the world, especially for in Japan, of course. And yeah, he's just having a Black Friday sale. So if you ever go to Japan, or you have an interest in Japanese language, just have a look at his product. Chris has already been a guest on my podcast. And it's a very interesting story that he has to share with you. Then you'll Steinberg is trying to get a mental model for functional programming with Swift UI, pre swift UI, his understanding was that you have multiple layers on the outside and an immutable core. But with Swift, wide views are value types. So there's a mutable filling between view and core. And that's his current quest to understand that that's typical Daniel Steinberg thinking that he wants to go always want abstraction deeper, and that's why such a good teacher in my mind. tipper Bowditch is planning to integrate his DSL libraries with vapor and start updating his Feder CMS code base to support the new async await features. So he's doing a lot of backend development again. And Leo G. Dion is doing the usual thing which is lots so he's updating his analytics library in Swift working on get century swift library, pushing Objective C episode with Iowa's Lake and finishing edit on the next episode with at underscore insights and order a new vehicle for the family getting ready for the last 2021 episode with at compile Swift, and he's still waiting on the little munchkin. So a very busy week, but also very exciting times ahead for Leo. So Leo, hope everything works out and that you don't have to wait too much longer. And that delivery is right on time. But when I was making very little progress with the preparations to open source, the biggest chunk of code that is ever released, it's pretty much 1000 lines of Swift code. But yet progress isn't as he would have faced, but still hope he can do the work and that he can get through it. So I'm curious to see what Pawel has to share with the world as open source. Adam Overholser is looking for Spanish, Russian and Portuguese better testers for his cheatsheets app. And XL the panic is starting to revamp his app settings and he plans to finish that this week so he can move on to the core engine of his app the trip recall, Andrew is working on a concept package for swift UI preview so that you can easily see prints messages without having to run the simulator. He loves previews. And with this just helps him work faster. He'll post more info later this week. So maybe we should follow at the craft by Brett's for more details. Eric Lippman is going to dive into project modularization. This week, he started by watching sub digital stock from Spain, which already was pretty helpful to get point started. And he's also trying to get our different apps teams to find more common ground and use their synergies. Camille to stern offski is announcing that tomorrow he will be posting another article and he has a small teaser of the contents of it. It's a big image with Mobius that says, What if I told you you can talk with your application. Even continuous saying that it's a big week for the company he's working at. It's the product release week. So exciting times it seems for him and flow right code shares that last week he prepared Blackfyre itself for its apps, which just started today. So a lot of big percentages off of his apps. So 50% off of the Pro versions of Yamo and 550 coins and even 66% of all operators. So all in all, a lot of people aren't announcing Black Friday sale. So have a look. And Donnie waltzes threat, the links in the show notes and maybe there's like a little tool between it. Maybe there's like a little tool in there and that's something for you and that you can pick up at a huge discount right now. So I hope you all will be having a great week and I know I am because I've been very busy last week and probably this week that continues. But just today early I've heard that the deadline that I'm working towards is actually December 7 And initially I thought it was end of this week so that gives a little bit of time to actually get what I'm working on up to spec and out the door so talk to you again next week

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