Start Using Lazy | Swift 5, Xcode 10

[@vamsi3877]

This is most productive youtube channel i have ever found.Thankyou kyle.

[@Kilo_Loco]

Glad you like it. This past week has been an experiment though. I do plan on continuing to put out content, but my experiment has given me insight as to what type of content I should focus on and how often I should produce it.

[@alifarhadi5704]

The best explanation for lazy property that I have seen on KZbin. Thanks

[@MrDonhekel]

also Lazy computed properties are only calculated once when they’re first accessed.

[@MrBhupeshpruthi]

Thanks for simplifying things..Your videos are always helpful..

[@phanikella8769]

the best explanation for lazy property... thanks kyle 🙂

[@JasonMitchellAZ]

Great demo showing how ‘lazy’ works

[@alirezaaj1957]

such a good topic, and specially explanation and example . that was an eye opening video about lazy and it's usage . one reason that i really like most of your videos is because , when you try to talk about a topic, you share all useful experiments that you have gained and extract of them and pitfalls and tips . thanks a lot Kilo

[@Kilo_Loco]

Really glad you feel that way about the content. If you truly like the channel, please share it with as many people as possible 😇

[@Kilo_Loco]

Really glad you feel that way about the content. If you truly like the channel, please share it with as many people as possible 😇

[@rasheedm2084]

This video clarified the benefit of Lazy in great way .. thanks Kilo

[@Kilo_Loco]

Glad I could help you out 😊

[@david-tracy]

At 8:00, in the ibaction, what if we put that code in the background thread so we could interact with the ui still.... and say we had initialized the service in viewDidAppear instead of viewDidLoad to gain the fast startup but get a head start on the process too... My question is - what could we do to stop that looping service if we decided to navigate to a different screen before the looping service completed? Thanks fam

[@AdelUI]

Kilo loco , crate a realm application using api and realm , EX : news app So next month , i'll support you in u're website . You're the best

[@Kilo_Loco]

This video might be helpful if you’re looking into realm kzbin.info/www/bejne/nnSZlX-Cl8uIjsU I will also be covering how to save data from an api soon trello.com/c/wq9xUKui

[@saibalaji4713]

Thank you sir 😊

[@Kilo_Loco]

always a pleasure

[@_Forever555]

Can it be used to get the last result of db call in a asynchronous function?

[@jacktoddy9783]

Great video - really useful to build into my App = Many thanks.

[@vincentjoyhere]

Thanks for the video. Really informative.

[@DesperadoAH]

Nicccce I was using it but didn't know about everything, thank you KL

[@Kilo_Loco]

My pleasure 😇 If there’s anyway to make my content better or if there’s a topic you want covered, please let me know.

[@GG-hk5iz]

Hey Kyle Can you please explain what is purpose or how adding lazy in closure eg u did in imageView is beneficial in same way as u explained very well for expensiveNumber

[@gjermundification]

9:13 Do any of you know where in the Swift documentation does it explain why a closure requires trailing ()? I assume it's called execute anonymous function.

[@Kilo_Loco]

I didn’t mention it until 13:13 . Idk where it says that in the documentation, probably under lazy, but essentially since it’s a closure that actually needs to be executed right then and there, that’s why we have to have the () at the end.

[@gjermundification]

Kilo Loco You are a naturist! Or should I say natural? I assume so too, hence I’d like to read the official documentation. It’s done more or less the same in ECMA Script.

[@Kilo_Loco]

By all means check the documentation. You don’t really have to though because if you try to write out a lazy property by setting it to a closure without the () I think it throws a compile error anyways

[@VeryBlueBot]

Very clear and useful thanks! Quick question: So from my understing, you wonldn't use `lazy` on variables you need in `viewDidLoad` right? As they mite be not ready when `viewDidLoad` triggers? Am I understanding this right? Thanks again! happy to find your channel

[@Kilo_Loco]

you can use them in viewDidLoad too. they will simply be created during that lifecycle event

[@VeryBlueBot]

​@@Kilo_Loco So if Im using a variable that is not populated/initiated yet (time heavy async result) in viewDidLoad won't I get an error? Assuming Im not checking if its not nil? in any case I wont be able to use the response content as it is not existing yet. Lets say its a really big http request that takes a couple of seconds to complete and viewDidLoad is firing ... Or... viewDidLoad is firing only after everything is loaded? Including lazy variables?

[@lucienchu9649]

Nice explanation. I am new to Swift, so there are many new stuff here. Self, lzay, weak, some closure stuff, when should I used them what they are potential problems. Still struggling with them. THX

[@Kilo_Loco]

You might find these videos helpful kzbin.info/www/bejne/j6LLp4mvnqqjf5I kzbin.info/www/bejne/rIS3ZYiEadhkock

[@GoingWalkabout]

Thx, great example you are giving here.

[@Kilo_Loco]

No problem! I always try to make things as clear as possible

[@davidandreasson1434]

THANKS, just thanks! I knew this, but It wasn't obvious for me! Now it is!!

[@Kilo_Loco]

It's my pleasure to add another tool to your tool belt 😉

[@TheAhmadReza]

Awesome! Could you pease include a link of you'r Xcode color theme file ?

[@Kilo_Loco]

As of right now I don't have a link to it but I plan on having a page setup on kiloloco.com that will allow people to download the theme in the near future.

[@piotriosdev4158]

Hi Kilo! You’ve got nice xcode’s colors. Could you give me please an information what colors do you use in xcode?

[@Kilo_Loco]

You can get the theme from here kiloloco.com/store

[@piotriosdev4158]

thx!

[@Kilo_Loco]

It’s my pleausre

[@vivekgarg8944]

Hi Kilo thnks for the video. Can you plz explain other usages of "lazy" keyword.

[@Kilo_Loco]

Using lazy for expensive functionality and for grouping code together are my primary uses for it. Not really sure what else lazy would be used for outside of that.

[@vivekgarg8944]

​@@Kilo_Loco Thanks for the reply Kilo. I read somewhere that we can use Lazy keyword in Higher-order functions. I wish I could explain to you but they are not clear to me as well. I'll definitely share with you whenever I'll find them.

[@Kilo_Loco]

Well higher order functions usually loop through all the items in collection. I suppose you could access your lazy variable inside the higher function in the event that you want to do something expensive on certain items in the collection. It really comes down to the same concept though. I wouldn’t really be able to give a relevant example myself since this would be a very particular use case that most developers would face. I know I haven’t come across something like this before

[@belafekete3125]

Thanks Kyle!

[@Kilo_Loco]

Always a pleasure 😊

[@adamkenton2585]

Hey man nice video, and I really like your color scheme, how is it called ?

[@Kilo_Loco]

It’s a custom theme that I put together. I’m going to share it on kiloloco.com in the near future

[@zehualin6686]

Is there build time optimisation in Swift 5 for the lazy keyword? Because normally using the lazy keyword would increase your build time as it gets type checked, and you really only want to use the lazy keyword if the initialisation is too expensive.

[@freerider6300]

You can specify the type as Kilo did with the UIView, I assume

[@Kilo_Loco]

So as I was demonstrating, the constant property would be initialized with the view controller so yea its too expensive. From my experience lazy doesn't increase build time and decreases in most cases.

[@HarshitKumar-br3iz]

Awesome

[@Kilo_Loco]

Thanks!

[@siddharthtiwari4849]

Thanks sir

[@Kilo_Loco]

My pleasure. If there’s anyway to make my content better or if there’s a topic you want covered, please let me know.

[@donathmm3881]

Good Video

[@Kilo_Loco]

Thanks. Glad you liked it

[@jhgjhgjhfjyhgjhgj5385]

ye next video about multithread

[@Kilo_Loco]

Thanks for the suggestion. I will add that to the list of topics to cover trello.com/c/UTZF7hMb

[@raimitis]

Lazy var usage is clear for expensive calculations, but still not clear for me why to use for views (how you made example). What is the difference between lazy var and var someImageView: UIImageView = {}()? Why I would use lazy for view component instead of simple var. Only case where I saw lazy benefit for view management was in case I would like to get view width or height. More info here: kzbin.info/www/bejne/ZqvYiHmYpMqnnpI

[@Kilo_Loco]

lazy wouldn't give you any real gains in performance for views. As I demonstrated, its mainly a developer preference that allows you to configure your views all in one place as opposed to having that code spread out across your view controller. Since your views are likely to be put on the screen before the view will appear, you'll actually see no gain at all.

[@raimitis]

@@Kilo_Loco That is what I wanted to hear! Thank you!

[@Kilo_Loco]

No problem 😁

[@adinolivier]

You should have more views seriously

[@Kilo_Loco]

Thanks! I’m really working hard on delivering content that is valuable to people. Any videos that you find valuable, please share them so they can help more people.

[@vishnusatheesh6645]

Adaptive designing

[@Kilo_Loco]

Thanks! If there’s anyway to make my content better or if there’s a topic you want covered, please let me know.

[@vishnusatheesh6645]

Kilo Loco static method , file private etc

[@Kilo_Loco]

Hope you find this helpful State & Class kzbin.info/www/bejne/eYeTlK2Cqsp6m6s Access Control kzbin.info/www/bejne/iWjGpGmkirepfZI

[@maximkrouk1697]

Would be cool if you make a video about advanced custom vc transitions, like in AppStore for ex (without snapshots, just real views), guess i’ve never seen such a video) (Here is one at raywenderlich.com, but they use a snapshot)

[@Kilo_Loco]

Yea I plan I’m doing some animation videos soon

[@superbrianable]

@twitter

[@Kilo_Loco]

@kilo_loco

[@tenminutetokyo2643]

DOOD!

[@wazawoo]

Yooooo

[@freerider6300]

I got hooooooes calling

[@Kilo_Loco]

BRUUHHH

[@Kilo_Loco]

Not me, I'm just a family man 😛