My iOS Developer Courses - seanallen.teachable.com
@Adrian.katzenstein
10 ай бұрын
Hi Sean! I've been working on my programing career for about 2 months now. I'm doing the 100 days of swift with Paul Hudson. Even tho this is all still a bit blurry i do appreciate your content since its starting to clear a bit of the fog that i had. Just wanted to stop by and say thanks! You'll probably see me around a bit more ✌
@seanallen
10 ай бұрын
Happy to help. Welcome to the channel!
@vadirajhippargi9285
Жыл бұрын
(well)->(explained) {Thanks a lot for great video}
@seanallen
Жыл бұрын
I see what you did there...
@alex5872205
Жыл бұрын
@@seanallen @Vadiraj Hippargi actually its (explained) -> (well). Your get your explanation and return an answer "well"
@ЛеонидОлеговичШевченко
Жыл бұрын
Super understandable! Thank you for this video, finally i've got it 🤝
@seanallen
Жыл бұрын
Happy to hear that!
@StuartZiane
Жыл бұрын
Well done, great explanations 👍
@seanallen
Жыл бұрын
Glad you liked it, Stuart!
@lancesamaria8130
Жыл бұрын
I’m going to be honest with you, this was a G-R-E-A-T explanation. I’ve read so many Medium posts and Stack Overflow answers where people either try to sound too smart or they just don’t realize that they’re not speaking in layman’s terms (they’re speaking to other people who don’t need it explained). This took a very simple approach to something complicated and made it simple. FANTASTIC explanation!!! You do a great job of keeping things simple! Seriously. And I like your graphics!
@seanallen
Жыл бұрын
Wow, thanks for the kind words, Lance. I'm happy to hear you appreciated the effort I put into the graphics and simplifying my explanation 😀
@PursueTheUnknown
Жыл бұрын
Where did the .filter come from? Is it part of the standard library (foundations) along with append, etc.?
@seanallen
Жыл бұрын
Yes. .filter and .sorted are part of the standard library for Swift.
@david-holmes
Жыл бұрын
Thanks, that cleared up some things I’ve been putting off for a long time 👍🏻
@seanallen
Жыл бұрын
Thanks again for the generous support, David 😀. I put off REALLY learning closures for a long time too... I was very intimidated by them early in my career.
@evan_ry
Жыл бұрын
That 15 minutes just saved me so much time developing my first native macOS app. Thank you!! Best Swift tutorials on KZitem.
@seanallen
Жыл бұрын
Thanks for the kind words, Evan!
@DocMacLovin
5 ай бұрын
You are speaking much too fast. A learning viewer needs pace to process your information.
@MrMainstay_
Жыл бұрын
This video came at Great time , currently figuring out this developing game.🙏🏾
@seanallen
Жыл бұрын
Happy to help, Kerrion! Closures were tough for me to figure out when I was just learning.
@cdelcar14
Жыл бұрын
My thought exactly!
@GabeColors
Жыл бұрын
"empty parentheses and Void are the same thing" - man oh man, this is the kind of stuff that takes hours off the head banging waste of time trying to learn
@GabeColors
Жыл бұрын
I've been looking for long lists of "this is the exact same result but a different way to get there in Swift" for 3 years
@GabeColors
Жыл бұрын
at 2:55 it would be awesome to keep that "other" code visible, comment it out, then we could see and compare the other way.
@seanallen
Жыл бұрын
Thanks for the feedback, Gabe. I'll keep that in mind for future videos. Glad you enjoyed this one!
@rogerrtewwr4723
3 ай бұрын
anyone else absolutely hate some of this syntax?
@michaelthompson7217
Жыл бұрын
my issue with this video is it isn’t a discussion of closures in swift but a discussion of a syntactic sugar for function pointers. unless i missed something, there wasn’t any point where you “closed over” or captured the environment when creating the closure, which is an essential part of closures. i assume you can also do this in swift closures but it wasn’t shown here
@0x0mnihaze
Жыл бұрын
Simple, nice and clear. Thanks for the video, Sean!
@seanallen
Жыл бұрын
Glad it was helpful!
@miguel.sanchez
2 ай бұрын
It's weird, but when you explained how VStacks use trailing closure syntax, my understanding of swiftUI drastically improved. I am the type of person that not only wants to memorize the syntax, but also understand why it is written like that. Thanks!
@seanallen
2 ай бұрын
Happy to hear it finally clicked :)
@nahidislam6099
Жыл бұрын
closures are my favourite part of Swift
@VideoTubeFan
Ай бұрын
Great explanation. And setting the speed to 0.75 helped a lot 😉
@seanallen
Ай бұрын
Thanks!
@sagmalrasmus
Ай бұрын
I am currently trying to learn Swift. And with every bit I code and video I watch I learn a 1% crumb of that language. But with the trailing closures explained it felt like an iceberg of 10% crashed into the water. Thank you. I think, maybe Swift is so hard to learn, because in all tutorials you learn the shortcut syntax first and never get explained why this actually works. But it would be better to understand the full syntax and all the principals first and then teach the shortcuts.
@jonathanmartin2326
5 ай бұрын
Before I start this video, I started searching for videos on closures , while actively using “100 days of SwiftUI” lesson plan, but during the first couple lessons involving closures, I could not get out of my head the question “If functions do everything closures do, why then do closures even exist?” So hopefully I get that answer from this video, because this thought it slowing down my ability to progress in learning swift.
@jayekpo
5 ай бұрын
My brother! Wow, I am also doing 100 days of Swift with Paul Hudson and I got confused by this as well. 😂 hope you pushed through 💪🏾 I just got here
@Frans000003
6 ай бұрын
Hey, very interesting! Just needed some advice on when should I use a function or computed property with closures?
@jrmoulton
Жыл бұрын
The video is great! But his definition of a a closure isn't correct. He says that closures are functions that can be passed around. But all functions can be passed around. The real difference between a closure and a function is that a closure has access to variables in the parent scope without needing to pass them in as arguments. This is a Square-Rectangle relationship. All closures are functions but not all functions are closures. What this video shows is that Swift has a short syntax for defining closures that makes them easy to use functions. But the shorthand syntax isn't what makes it a closure. Non-closure functions don't have access to variables in the parent scope unless you pass them in as arguments. Closures can just access variables in the parent scope without having to pass them in as arguments. The examples in this video are good for creating functions with a shorthand syntax that match the function signature but the examples in this video aren't unique to closures. In Swift all functions are closures. If you define a function (not with closure syntax) in Swift inside of a scope it will have access to variables in the parent scope. This makes it a closure. But this isn't true in all languages and is an implementation detail of the language.
@wrestlingscience
Жыл бұрын
slow down plz
@ChrisHansonDev
3 ай бұрын
Change your video play speed…
@tylerwatt5651
Жыл бұрын
Awesome video, Sean! Thank you for all the work you do!
@seanallen
Жыл бұрын
Thanks Tyler. Glad you enjoyed it!
@bitwisedevs469
5 ай бұрын
I am a fan but I think Dr Angela Yu’s course explain it a little better this time.
@zurvey
Жыл бұрын
Wow, Sean. You are a very good teacher. Thank you for this. 👍🏼
@seanallen
Жыл бұрын
Glad you enjoyed it, Tom 😀
@ChrisHansonDev
3 ай бұрын
Explained very well.
@seanallen
3 ай бұрын
Thanks!
@jadethompson4510
6 ай бұрын
Was confused AF going through swift tour, but this video really cleared everything up.. thanks!!
@seanallen
6 ай бұрын
Glad it helped!
@ivanyoed
Жыл бұрын
8:30 sweet. Gave a special style to the video.
@seanallen
Жыл бұрын
A lot of times when I’m editing the video I’ll think of ways I could have explained things more clearly. That’s what that was :)
@meliVinelli333
Жыл бұрын
“@escaping ? …. Who are we running from?” 😂
@dixztube
8 ай бұрын
Not a swift dev but some good information here that if you already know this it makes it connect from a different perspective. Great video
@seanallen
8 ай бұрын
Thanks for the kind words!
@mostly_def
7 ай бұрын
Excellent content! This answered so many questions quickly and kindly 👏
@seanallen
7 ай бұрын
Glad it was helpful!
@gregorymolette118
Жыл бұрын
really nice thanks
@seanallen
Жыл бұрын
No problem, Gregory
@jaylensmith6308
Жыл бұрын
So now think of escaping as you’re putting popcorn in the microwave. But it’s taking so long to pop, you ask that one friend who’s in the kitchen to wait for it to finish popping and bring it back to the living room?
@seanallen
Жыл бұрын
Lol, that's certainly one way to remember it 😀
@allenwaddell556
Жыл бұрын
I've just started delving into the mystery that is closures. Your video helped both for what they are and, especially, why I will need to know them. Thanks!
@seanallen
Жыл бұрын
Glad it was helpful!
@RichardBaileyrichoncode
8 ай бұрын
Looking for ways to identify closures when we see their address in memory graph during debugging. So often they just show an address. Is it possible to make a trailing closure more recognizable in mem graph? Or to find a closure by address wile debugging? Or to print the address of a trailing closure?
@seanallen
8 ай бұрын
Not that I'm aware of
@biganski
7 ай бұрын
I should have known that I could trust another Sean to explain this well
@seanallen
7 ай бұрын
Haha, glad you liked it.
@JeradAcosta9
Жыл бұрын
Thank you so much for clearly explaining the $0 and $1 in closures. I have read and studied it so many times but now I just got it in 1 minute. Thank you!
@seanallen
Жыл бұрын
I wanted to be sure to explain that because the $0 and $1 tripped me up for a LONG time. Glad I could help!
@王登科-u5c
Жыл бұрын
I absolutely loved the Swift Closures Explained video by Sean Allen. As someone who has struggled to understand closures, this video was a godsend. Sean does an amazing job of breaking down the confusing aspects of closures, like what the parenthesis mean and the shorthand syntax. He explains everything in a clear and concise manner, making it easy for even a beginner like myself to follow along. I also appreciate the fact that Sean provides a promo code for Squarespace at the beginning of the video. It’s always great to get a discount when you’re starting a new website or domain. Overall, I highly recommend this video to anyone who is struggling to understand closures, or anyone who wants to brush up on their Swift knowledge. Thank you, Sean, for creating such an informative and helpful video.
@DavidNitzscheBell
Жыл бұрын
I’m on my phone so not sure if this has been said before but it took me a while to figure out how to sort on multiple values…. Tuples!!!! { ($0.score, $0.name) > ($1.score, $1.name) } This will sort first by descending score, then by descending name. To sort by DESC score and ASC name: { ($0.score, $1.name) > ($1.score, $0.name) }
@farhadali6956
Жыл бұрын
Code magician, expecting more :) with closure and SwiftUI
@wristocrat
Жыл бұрын
I love this!
@armandmugabo1170
Жыл бұрын
awesome
@seanallen
Жыл бұрын
Glad you liked it 👍
@rvamerongen
Жыл бұрын
A Question, is the var topStudentFilter always recalculated when 1. Its called, or 2.when the student array is changed, or3. at both times.
@glennmiller394
Жыл бұрын
Another good one.
@seanallen
Жыл бұрын
Thanks Glenn!
@jasonmountain4643
Жыл бұрын
Finally my Javascript knowledge helps me out. I picked these up quickly.
@pranavsubash689
7 ай бұрын
Extremely useful video. I came here for closures and learnt so many things I was confused ab all in one go thanks
@seanallen
7 ай бұрын
Glad it was helpful!
@pranavsubash689
7 ай бұрын
@@seanallen Oh wow I can’t believe you replied. I rly like the way you teach by the way - I just reached ur 3rd video in the visionOS series. Exciting times we live in
@seanallen
7 ай бұрын
Hope you enjoy the visionOS content. Much more to come!
@alejandrogermosen5764
Ай бұрын
Perfection
@johndickson9709
Жыл бұрын
Thanks for the great videos, closures have been a source of mystery for me since I started. One question, in the first example, is the closure being passed in as a type for topStudentFilter?
@wristocrat
Жыл бұрын
Thanks!
@seanallen
Жыл бұрын
Thanks for the generous support! Hopefully this cleared up Closures for ya 👍
@mzd8184
Жыл бұрын
Hey Sean, thanks for this. Can you make a video about Callbacks? Differences between completion handlers and Callbacks?
@ingongoyama3995
Жыл бұрын
WOW! The most Clear and concise explanation I've seen on closures in 6years of developing.
@joshuahart2100
Жыл бұрын
Excellent examples! Now do the same example with Async Await
@MacManley
Жыл бұрын
Chuckled at the escaping one 🤣
@seanallen
Жыл бұрын
Just a small glimpse into my inner-monologue while coding.
@李淳澔
Жыл бұрын
What a wonderful tutorial, clear but also full of knowledge. You really helped me understand the book of swiftUI, thanks a lot !
Жыл бұрын
Thank you for your explanation. Coming from typescript the curly brackets kinda confused me alot. This video really explained well how SwiftUI are just bunch of shorthand ways of writing trailing closures. Could you explain the following code for me? I know what it does, but how did this shorthand version got formed? What would it's "full hand" counterpart be? ``` Button { showDetail.toggle() } label: { Label("Graph", systemImage: "chevron.right.circle") .labelStyle(.iconOnly) } ```
Жыл бұрын
I think I figured it out, and that a function can have multiple trailing closures.
@danielniels22
Жыл бұрын
best teacher i found about swift fundamentals
@missionsalesforce4646
Жыл бұрын
Can I see a closure as an interface like in Java
@frankz2933
Жыл бұрын
very good video!
@seanallen
Жыл бұрын
Glad you liked it!
@harunroshid4667
Жыл бұрын
Hi Sean are closures like object in java where you can call them whenever you need them
@DavidNitzscheBell
Жыл бұрын
Not exactly like an object. Closures are functions, but without the function declaration. Some variables are declared to be Int. Some are Strings. Others are Student, or some other custom struct. But, variables can also be “ functions that take certain types as parameters and return a certain type” So you can say: var aVar: (Student, Int) -> [Student]
@dobsonmartin
Жыл бұрын
Suggestion: When teaching to beginners, use unique variable names throughout your code and try not to repeat them between functions that don't end up passing the variable out of it anyways… @6:25 you talk about how we could have used 'persons' instead of 'student' but are using 'student' because it "makes more sense, they're students"… but I see the name 'student' being used at least 13 times on that one screen alone. As stupid as it sounds when I'm learning the new syntaxes I type in variable names like "sparkleUnicorn" and "bubaTheBillyGoat" (silly name placeholders) to keep track of where the variables actually point and go to. When the tutorial overloads with one word being re-used over and over again it just makes my head spin.
@Togidubnus
Жыл бұрын
I'm sorry about your head. Maybe computer programming isn't for you. As far as overuse of the word "student" is concerned, it's only seldom repeated assigned as a variable. Mostly student is written with an uppercase S. In these cases, Student is used to refer to the initialiser for instances of the struct Student. To create an array containing instances of Student, the word Student has to be used each time for each instance in order to initialise it to that type, Student, and none other - not UIView, nor UnsafeNonblockingEquitable, nor SparkleUnicorn for that matter. Swift uses an unenforced convention of capitalising the first letter of struct and class names, lowercase for everything else, making the potential for any ambiguity rather less dizzying.
@DavidNitzscheBell
Жыл бұрын
@togidubnus that snide remark was really unnecessary. Your explanation about why `student` appears so often was useful. It’s just a shame the way you started your comment.
@afixithei.V
Жыл бұрын
Should I invest my time in Swift UI or UIkit? I'm an experienced Android developer and just starting to learning iOS development to boost my portfolio; not necessarily trying to get a job as an iOS dev at least for the next 1 - 2 years
@hansalucas
Жыл бұрын
I would recommend you ask this type of questions on Reddit. There's a very active sub for iOS devs. Personally I would start with UIKit since the majority of companies still use it, and it's easier to go from UIKit to SwiftUI than the other way around.
@iLoveAppl3947
6 ай бұрын
@@hansalucas yeah i can confirm... start with UIKit and then SwiftUI. The other way around will feel like a headache
@hansalucas
Жыл бұрын
Sean you are without a doubt my number 1 iOS teacher. Thank you.
@seanallen
Жыл бұрын
I appreciate the kind words :)
@raul286162
8 ай бұрын
As a flutter developer who is learning SwiftUI I must say that it is the most horrible syntax I have seen for such a simple mechanism known in many other languages such as "Callbacks".
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