Null safety in Dart - Introduction

yes do not discriminate null they have rights too xd

Totally same with Swift, but it's still awesome. Thanks Flutter team :D

I wasn't able to understand what null safety mean but now i understand thank you

Also the larger general programming question is.... Is null a feature or bug?

Great content!

Too Many NULLS in a 5 Minute video []~(￣▽￣)~*

void main() {
int? da=null;
print('hello ${da+1 }');
}
I don't understand the exact reason of null safety , above code need to apply null check. then whats the benefit ??

👍

How to add null safety for this -->
@Query
('SELECT * FROM Favorite WHERE uid=:uid AND id=:id')
Future<Favorite> getFavInFavByUid(String uid,int id);
Error --> Query method parameters have to be non-nullable. Define uid as non-nullable.

avoid using ! , what i do it 90% of time

very respect <3 sir

Thank you for such informative and easy to understand guide 😁

Please fix the subtitles

can't you just swift for Flutter :-P

Thanks for your explanation. What is your native language anyway?

thanks a lot got my self clear on it he he he he he he

"Stay null-safe out there", hahaha that's hilarious

Super video. Please create more news videos and tutorials.

But it creates problem while declaring global variable.

Great Video

my 2 hour search is over. At long last, a question mark saved the day!

Thank you, much appreciated!

Nice thank u.
i have a question. we should use ! when we guess maybe the value is null?

Oh god, I developed an android app 2 years ago with older Dart version and I started to upgrade it in these days without knowing the language is almost completely changed.

This really changed a lot from the last time i coded in dart

Thanks for this...there is a few of us taking a Beginner Flutter course with Angela Yu...and in one of the lesson she has us coding like this:

void main() {
greet(greeting: 'Hey', namePerson: 'Cindy');
}



void greet({String namePerson, String greeting}){
print("$greeting $namePerson");
}


But this now throws a Null error in the latest Dart.......us beginners in the comments note that we can fix this either by putting a '?' at the end of the String...or by placing the word 'required' before 'String'...but what should we do in this case ideally? Thanks for any clues if you have a moment!

Instead of a null crash I now have empty screens which are harder to debug. Not sure if this is an advancement.

Thanks. Nice video as usual.

Thanks a lot, great and simple video ❤

Thank you

Okay I'm just starting to learn flutter and all that dart thingy but this feels like obsessive fear of nulls. You've explained that you're not allowing "developers" ( read as pseudo developers ) to use null pointers/values just because they can hurt themselves? That's like the worst case I can think of and forcing usage of such mechanisms is wrong on it's base. Imagine having huge system that relies on some object value, let's even imagine it will be amount deducted from your client bank account and just by forcing reassignments of that value you can recieve some random number at the end of processing because "it cannot be null". This way the application instead of throwing an exception will just say "ok, we deducted this random number from you client bank account".

The real question is.. when we start treating developers as adults? Or when did we become so unaware that we need that much of assistance?

This guy is really good at explaining Flutter stuff. Amazing video

Indeed. Stay null-safe, everyone!

very nice

Knowing how annying NullPointerExceptions can be in Java and how NullSafety like this can be from Kotlin and Swift. I am going to love Dart even more than now... I hope it does grow out of java lol. Like. Go on. We have a Dart to javascript transcompiler. And I used it with a Cordova app a while back.

beautiful

Great explanation! Thanks a lot

Please fix the subtitles 🙏
They're lagging

Flutter team should reduce this dramatics in their videos ...looks pathetic

Good

Very well explained!

Awesome!

🚀

i'm going to start saying var-EYE-able every time now.

now i'm feeling better. u made it so easy.. thank you :)

you are by far the best person explaining binary options! Thank you for putting these videos together. I look forward every week to see your videos!