Kotlin lazy delegate - explanation and example

Lazy is an inbuilt Kotlin function which allows us to construct the object when it's actually used, and subsequent calls return the remembered result.
➤ Docs: kotlinlang.org...
➤ lazy vs lateinit: / kotlin-variable-to-be-...
➤ Programming Kotlin by Venkat Subramaniam: amzn.to/33yHJ7r
➤ Android Cookbook: amzn.to/3IfEX6h
➤ Head First Kotlin: amzn.to/3I77Z7Z
Hi! I’m Rahul, a software engineer with a passion for teaching. I went to Stanford, was a founding engineer at a startup, and have worked at various companies across Silicon Valley. I’m currently an Android Developer at Facebook and teach an Android class at Stanford. Would love to connect with you! This channel is about tech (especially Silicon Valley), combining tactical how-to guides with interviews.
📹 UA-cam: www.youtube.co...
📝 LinkedIn: / rpandey1234
🐦 Twitter: / rpandey1234
📸 Instagram: / rpandey1234
📂 Github: github.com/rpa...

[@RahulPandeyrkp]

Learn Kotlin in 12 Minutes: ua-cam.com/video/iYrgWO2oibY/v-deo.html

[@jokersmith9096]

I just wanted to say thank you, this is incredible content.

[@RahulPandeyrkp]

wow, really appreciate that! thank you

[@scottbiggs8894]

Thanks for the deeper dive into the lazy code.

[@tejaspatel7170]

Amazing and awesome. seen someone today who dive into source and explain things at peak... HAPPY TO SEE THIS EVEN IN 2023 !

[@Dinesh-vg3sg]

Thanks sir, I liked the way you have explained things in detail.

[@kartikayy]

While we can implemented own version of lazy initialization, lazy in kotlin still saves a lot of boiler plate code. Thanks for the video.

[@jam4l]

OMG this is amazing, the way you have explained just wow, TY.

[@siddharthchughs100]

Hi Rahul , I really appreciate your knowledge and your insight on topics, which is quite very good, Thanks again.

[@vengateshm2122]

Nicely explained with internal working.

[@RahulPandeyrkp]

thanks a lot

[@onmoveonmove226]

Thank you for your explanation

[@komodotanjidor7272]

Great simple explanation but nonetheless clear as crystal

[@ashishgautam2842]

You are polishing us 🙏🙏

[@RahulPandeyrkp]

i'm all about the polish

[@BelhouchetInesyen]

Great quality, very efficient.

[@RahulPandeyrkp]

Thank you!

[@shubhamnanche]

Great explanation 😃

[@ananjaygurjar]

Incredible way to explain stuff!!

[@RahulPandeyrkp]

thank you!

[@telurasinmontasik2406]

this is what I need

[@shutanovac]

This helped me understand the lazy delegate :-) Thanks man! Can you also talk about other delegates?

[@RahulPandeyrkp]

thank you! will definitely consider other delegates :)

[@rajeetgoyal6879]

Great content🔥 Please consider making your videos in Dracula theme. That might be a lot more pleasing for eyes :)

[@Another0neTime]

Great explanation!

[@RahulPandeyrkp]

thanks Josh!

[@nalinitippa5942]

Great instruction !!

[@RahulPandeyrkp]

Thank you!

[@BehnamKhani]

great!

[@emanalsbeiheen5619]

Thank you Rahul very helpful content 🌹.. Can you please talk about Refliction in kotlin and how to use it please...

[@RahulPandeyrkp]

Sure, can add reflection to my list. I don't use it too frequently though

[@nathann4291]

THE LEGEND

[@RahulPandeyrkp]

❣️🥳

[@droidcasts7350]

nice explanation, thank you

[@RahulPandeyrkp]

You're welcome ☺️

[@matt-g-recovers]

Subbed

[@house_d2024]

hello Rahul , i like the way you teach! I want to ask you two things : to teach us kotlin multiplaform and to create a project using sqlite in android . THANK YOU A LOT

[@RahulPandeyrkp]

thanks a lot! I'd also like to do something on SQLite!

[@-no-handle]

Feels like I found a Gold mine.

[@RahulPandeyrkp]

😇

[@ravi_sorathiya]

Thanks coding in flow

[@RahulPandeyrkp]

thank you + coding in flow

[@ravi_sorathiya]

@@RahulPandeyrkplooking forward to in depth kotlin corotines and flow tutorial
If you planning to make it

[@ravi_sorathiya]

I just hit that subscribe button without wasting any further time after coding in flow posted insta story
Know that's something is awesome there

[@MisterWealth]

Does anyone have a realistic example of a late init?

[@SuboptimalEng]

Good thing I’m lazy AF

[@RahulPandeyrkp]

we're so similar 🤣

[@fernandoperalta891]

Hi Rahul, I really enjoyed this video! I had a question about your 'My Memory Game' tutorial on the freeCodeCamp channel. I wanted to ask if if would be ok to edit a couple of features from the tutorial version and then publish it for myself on the Google Play Store. I'm fairly new to licensing and using open source software so I wanted to ask if this would be ok instead of doing it without asking. I hope you can get back to me and I love your videos!!!

[@RahulPandeyrkp]

Thanks Fernando! I also replied on LinkedIn, copying over my message here in case it's helpful for others:
You are welcome to take the tutorial + source code and do anything you want with it. You are free to add features, publish the app, or even commercialize it (a few people have done this). The open source license I used is Apache-2.0 License, which is quite permissive.

[@fernandoperalta891]

Thank you for the clarification! I really appreciate it.

[@gdnk703]

Why automatic subtitles are not in english. Сan you fix it? Please

[@RahulPandeyrkp]

You should be able to control that on your end

[@erenizci4197]

Really good content but i am too lazy to implement this.

[@RahulPandeyrkp]

😅😂

[@avirias]

Why lazy function definition has "actual" keyboard?, What is actual in kotlin ? 4:30

[@RahulPandeyrkp]

Great question - "actual" means the implementation of this function has a platform-specific implementation. Kotlin code can be used in multiple platforms, such as JavaScript environments, native code, or JVM-based environments as being done here (that's why this file is called "LazyJVM.kt").

[@AS-iv6vx]

Why you add accountantDelegate? why not accountant.isInitialized()?

[@RahulPandeyrkp]

isInitialized doesn't exist as a method on the accountant, it's on the Lazy interface

[@AS-iv6vx]

@@RahulPandeyrkp I understand, you have changed "by lazy {}" to "= lazy{}"

[@RahulPandeyrkp]

@@AS-iv6vx yep exactly

[@theai2020]

half of the video is just nothing just this and that try to squeeze things in more compact way but still informative

[@RahulPandeyrkp]

didn't understand 🤔

[@theai2020]

@@RahulPandeyrkp yes same