Flutter Null Safety (!, ?, ??, late, ...)
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- เผยแพร่เมื่อ 13 ก.ค. 2024
- Learn everything about Flutter Null Safety & Dart Null Safety.
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TIMELINE
0:00 1. ? Question Mark (Null Safety)
0:29 2. ?? (Null Safety)
0:45 3. ??= (Null Safety)
1:03 4. ...? (Null Safety)
1:24 5. ? and ! (Null Safety)
2:35 6. late keyword (Null Safety)
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This might help you :)
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Great content as always. Like 2 weeks ago I had to migrate this old project I had to null safety and update all its dependencies. I did it manually. It drove me nuts. This guide would've made things much easier.
Thanks for listening my demand ❤️
Best flutter teacher 🔥
The best video about it. Straight to the point.
Very understadable! Thanks
Best null safety guide ever,, nice work 🔥🔥
Been looking to understand the difference. Thank you very much 🙏
building list with complex very json data in flutter implement in ui
Same question
How to implement a complex nested JSON object in ui flutter
Same to same my question please explain properly
This question is very important because I have to give project for 3 days and I am not able to implement nested API.
My is same
Keep going.. very informative content..
There's always something that you don't know. For example, I am a flutter intermediate. But ...? was new for me. Thank you for the tutorial. Really enjoyed to watch those smooth animations.
As always, best explanation ever
was very helpful to me, thank you!
Great video. Thanks
wow nice explanation :)
thnx a lot
Nice! Thanks!
Nice work, thanks!
what an amazing explanation, kudos!
Thank you, Krishna Gupta! 🙂
Made my day bro. This operator (!) with nullable var was a headache for me.
You are welcome, @ashfaqkayes5222 😊
Greatly explained
Absolutely incredibly useful information in a beautifully concise way. Love your work
Thanks, Tȟaŋháŋši Tȟáŋkamatȟó! 🙂
Wonderful content as i expect, keep going.
Glad you liked it, @mohammedtouati8479 😀
I must say that One of the best informative video on your channel ever
Thanks for sharing this great useful information with us
Glad you liked it, @realislam8153 😀
clear presentation, I just wanted to know more about null safety
I really love your short and unique explanations, keep going bro
Glad you liked it, Barzy Yasin 😀
Very good lesson! Thanks!
You’re most welcome, @danqiu6413! 🙂
That voice sir.... :)
thankyou sir for this informational video... :) LOved it
Very very Good video
Thank you u explain how to solve null safety problems
@@HeyFlutter
I am waiting another videos from u
I need 30 minutes video on null safety ,deep explanation
nice explanation sir thankyou
You are welcome, Somesh Sahu!
Your channel is like stackoverflow when I stuck somewhere while coding :) Get your recipe pill just before start.
Great, Thank You VelociRaptor
Thank you
You are welcome, @user-jj3ld6kk2u!
Could you make a video lesson on Dynamic Links please...
My flutter teacher
Cool
🔥
Can you explain how to convert previous version of project to null safety
nice intro
i clicked on container then container size will be increased from bottom and where size will increase I want to add text on that space.......
which widget use for this??
json data in flutter how to implement
Hi Sir Please Make a video on how to request Location Permission on run time i am getting location but for that i have to allow location manually in settings of app Kindly make a video on permission Dialog Box Thanks
@@HeyFlutter sir please make next video on this topic. I've requested this video in last month
Excuse me sir! I'm learning so much from your tutorials 😃 and while learning I got a problem that i created drawer and button NavBar for my app but when i opened drawer ,NavBar came infront of the drawer...How can i fix it. Please help me as possible !
@@HeyFlutter Sorry Sir but I can't get it😞 ! Could you please make a video tutorial on it ,tough cause I see many people have got the same problem. It would be really useful for beginners like me. ❤️
Thank You Ⓖeek! Follow this link: stackoverflow.com/questions/63882656/flutter-drawer-overlaps-the-bottom-navigation-bar
I hope you will get your answer 🙂
I didn't know about ?... operator.
Bro how Can I Paste any File In Particular device storage data path Using button In Flutter ? Can you Tell Something About It?
Thank You Coder! Follow this link: medium.com/kick-start-fluttering/saving-data-to-local-storage-in-flutter-e20d973d88fa
I hope you will get your answer 🙂
Nice like always, can we expect soon something about dapps with flutter? Maybe on Ethereum network or others...Thank you for amazing content :)
When is late initializer needed? It seems like a keyword that leads to bugs
Hahaha 😅
In a stateful widget with a dynamic value that is assigned to another variable in the initState statement. In order to use that variable in the widget, you need to initialize it outside the initState and that's where I use "late". ☺️
Thank you, Jorge Andrés! 🙂. Use late when you strongly convinced that first time you use late field it will be initialized
Please activate the subtitles in different languages
Sir can you create a DISCORD server so all of your subscribers can join there and chat or solve problems together?
Error: The operator '[]' isn't defined for the class 'Object'.
- 'Object' is from 'dart:core'.
Try correcting the operator to an existing operator, or defining a '[]' operator.
final data = snapshot.data!["data"] as List;
Can you solve the problem?
Thank You محمود علي حسين! Follow this link: stackoverflow.com/questions/60245865/the-operator-isnt-defined-for-the-class-object-dart
I hope you will get your answer 🙂
why is this channel only in english
Because it's the most known language worldwide.
Thank you, Gataka534! 🙂. In future I will think about it, but for now it will remain in English as it is easy for people to understand English.
throw error when List eroror Text([...?_secList.elementAt(0).id, 1].toString())
Hey @johnmartin9329, make sure to follow the tutorial step by step 🙂