Type Promotion | Decoding Flutter

In this episode of Decoding Flutter, Khanh will discuss how type promotion works in Dart, when to use it, and why it doesn’t work on object properties!



#DecodingFlutter #Flutter #Developer

[merthyr]

Good info, but also good to remember how messy this can make your code if you rely on it to 'simplify code'. Unless you're working with an annoying API you should always declare types as specific as possible because relying on type promotion is evidently dodgy

[francisgeorge]

tldr, dart can't predict the result through a getter as it could be overriden, so type promotion through a getter doesn't work without first setting to a local variable.

[vivekkumar-nbsw]

Thank you so much for Hindi is really useful info for us...and i am expecting hindi subtitles for all the videos of this you so much....love u guyz

[thomasmabika]

Excellent explanation! More intermediate to advance concepts please.

[LoneWolf-hgix]

"Nullable types are a union type of null and its underlying type..."

Wouldn't that mean that technically union types already exist understood in dart?

Probably in the nearest future we see it as a native language feature?

[youssef.elmoumen]

I like the way she's spelling shtring
Great explanation 💞

[HuntingKingYT]

Heads up to Khanh Never gonna give you up! Nguyen

[bennguyen]

How does the variable-type followed by a question-mark work? for example when do you want to assign a null via "String?" "int?" vs "late var"?

[kprakash]

Can we Build an Ecommerce Application by using Flutter Madam

[cermilbonzo]

What color theme & font of your editor?

[mibi]

That's why I want to forget all of these check and go with functional programming for data and application layer in Flutter app :)

[vinceramces]

type promotion should also infer type without needing to do nested if statement. For example,

if(x != null) return
x.copyWith(...)

[philohan]

Please give Dart an `if let` functionality like Swift.

[fredgotpub]

Pay attention, rickRoll towards the end.

[nicktech]

C# solves this in a more elegant way:
if(maybeString is string stringForSure){
// do actions with stringForSure inlinly declared variable
}

[AiDidthis.]

😂 I thought there was a data type called Promotion

[efliedus]

Literally 6 minutes on thing that must be avoided as much as possible in strict typed programming languages... But yeah for niche cases that knowledge is indeed useful