Flutter: Null Safety (!, ?, ??, late)

[@HeyFlutter]

This might help you :) 👉 12 Week Flutter Training from Newbie to Expert: heyflutter.com Source Code: github.com/JohannesMilke/null_safety

[@vTailsFPS]

This is amazing! so simple but explains it so well! You just saved me loads of reading and research! Thank you

[@husseinnasibu]

You always do a great job milke you are my favorite flutter KZbin instructor, it's short clean and fully comprehensive thanks you very much for your dedication....

[@Kumar-gz8sb]

Good and fast

[@shribalaji1403]

You're so amazingly explained. And saved a lot of time and moreover I love your voice it's so good and pampering!. Ur so amazing dude.

[@HeyFlutter]

Thank you, Shri Balaji! 🙂

[@youtubeflight]

Whoa this short video was super helpful and full of core compact information!!

[@programingtales7514]

I love the way that you explane the subjects in flutter awesome! you are the best ❤

[@naimurhasanrwd]

Thanks, you always make good tutorials with best time utilising.

[@riteshkumartiwari153]

Best Explanation

[@Sarah-py7qf]

Thank you soooo much!!! Your explanation is exactly what I was looking for. Awesome!!

[@HeyFlutter]

You’re most welcome, Sarah! 🙂

[@amimulihsan5354]

Great explanation

[@adelaskri6347]

Amazing, i was just looking for a way to initialize the variable as late modifier !

[@Klausi-uq4xq]

Nice! was a hard work to convert mostly everything of our apps to null safety.. but im feel fine with the force to check everything again and again against null.. better just an empty Container than a red Exception

[@emadharazi5044]

Giving it to us straight. Love it!!

[@HeyFlutter]

Thank you, Emad Harazi! 🙂

[@dhiaeddineabdelli4296]

simple and clear. Good job

[@nikhilkukreja8498]

Brilliant Johannes ❤️❤️

[@iBagnara]

this video save my time a LOOOOOOT

[@uditmishra5583]

great explanation!!!!!👍

[@ezeaguprincewill7005]

Just went I needed it

[@AdamsProgrammer]

Thank you. Find it hard to understand

[@rv9570]

Awesome. You are genius man.

[@ProfullowDream]

Hello sir... Can you make Firebases tutorial series...I need deep knowledge

[@muhamadahmad9096]

Very helpful thank you!!

[@HeyFlutter]

You are welcome, @muhamadahmad9096!

[@abderrazzakzahir168]

Thanks

[@InsanJdev]

That's an awesome one. Are you done any videos about classes in flutter or will?

[@Amine0027]

I think we can also use toString() method to change a String? to String type

[@zabinoori49]

Best video bro thanks a world 😍

[@HeyFlutter]

You’re most welcome, Zabi Noori! 🙂

[@vijaygovinda719]

Can you make a series on Provider

[@AsifKhan-il9gm]

Hi, please make video on flutter_bloc

[@khalilaljamal5146]

You are my hero Milke , can I use your videos to translate to Arabic language

[@Anythiny]

null safety in nutshell ..............awesome please help me in understanding complex json i m stuck

[@HeyFlutter]

Thanks for the idea, 062_Vivek Pandey! 🙂 I have added it to my list of ideas for future videos!

[@SamadKanton]

Great content dude! But wait, is it worth while to develop a web app using flutter dart? Tried it but it seems to be very slow in compiling or running.

[@santiago4773]

you are amazing

[@omkarp9943]

You got a one sub!!🥳❤

[@HeyFlutter]

Great, Thank you @omkarp9943!

[@abderrazakkenniche4995]

Huge thanks for this tutorial, it is amazing as you are. I just have a problem and I always look for the solution without a result When I use SharedPreferences or SQFLite connections, I must use late keyword and assign my variables inside the initState, though because those connections are asynchronous, I always get late initialization error and this crashes my app. Hope you can help me dude

[@braafaisal2258]

Exception has occurred. LateError (LateInitializationError: Field 'timerr' has not been initialized.)

[@mobihen]

Can you please share you theme name? Or recommend a dark theme? Great as always!!!

[@mobihen]

@@HeyFlutter In the video, you’re using vs code with some kind of a dark theme. Can you say which one is it?

[@derschmeidt2224]

As I understand so far "late" is a promise that it will be initialized. In which case should I use it? Isn't ? always the better option? What happens if the promise "late" is not initialized later? you said it will be crashed the app. But at which time? Maybe it takes a second to get the asynchronous call for a variable from a server or something. When will it crash if the variable is not there?

[@HeyFlutter]

Hey, @derschmeidt2224 🙂 please refer using "late" only when you are sure enough that your variable is going to be initialized later on eg. TabController that can be initialized only in init() method. But if you are using late for data coming from server, local or shared pref then it will not be a good choice

[@derschmeidt2224]

@@HeyFlutter thanks a lot.

[@youtube.com-handle]

me: hey listview, catch... throws a late list into the ListView items ListView: hey, they might be null me: yes, maybe, maybe not here ?? [ ] ListView: alright, you are the boss User: why is there an empty list over here?

[@fuhovu2225]

null safety sinh ra để làm j đấy các bác, mấy ngôn ngữ khác có thể loại này đâu

[@sarathrkrishnan6610]

❤️

[@davidagyakwa288]

what about ?=

[@gormonleguetteur6935]

❤❤❤

[@ArjunSinghh]

¿¿ this is not working on objects like Model.data.value??" " throw eror This is not working when you now it is string

[@muafaa]

still confused null on empty List

[@HeyFlutter]

Hey, Muafa R 🙂 may I help with your confusion, please share

[@cavidanbagiri7837]

First like ))

Not sure why they added this to flutter. it's annoying af.

[@kid_rz]

What means this code. if(!isLoggedIn) { //todo }

[@muhammadtalharana2532]

This is amazing! so simple but explains it so well! You just saved me loads of reading and research! Thank you

[@HeyFlutter]

Glad I could be of help, Thank you Muhammad Talha Rana! 😊