Comments (4)
Hey Ian,
That's an interesting idea, thanks for sharing!
Am I understanding correctly that this approach doesn't distinguish between optional values being set to nil
and not being set at all?
from iankeen.github.io.
hey @zapko , thats right! When you set an optional property to nil
it removes it from the underlying dictionary.
When you eventually come to extract the data if the target is optional this shouldn't matter since the generic type should define what data you want at the end.
So if a property should be non-optional and you don't give it a value in the partial data structure it will fail when you attempt to produce the 'real' model at the end.
from iankeen.github.io.
Yeah, so if I want to calculate next step of a flow based on what data has been retrieved so far - it's not the approach I should follow. Or is there a way, what do you think?
from iankeen.github.io.
well thats more 'business logic' - you can use this to help determine whats next, but its not something that this structure should handle on its own, for example your view controller/view model/etc could do something like:
func nextStep() -> Step {
if (try? partial.value(for: \.firstName)) == nil { return .firstNameStep }
if (try? partial.value(for: \.lastName)) == nil { return .lastNameStep }
return .complete
}
Probably a good candidate for adding a contains(_:)
to Partial<T>
👍
from iankeen.github.io.
Related Issues (10)
- A fresh start HOT 5
- Better Codable models through composition
- Surviving RxSwift HOT 2
- Container Coordinators
- Cross View Animations with matchedGeometryEffect
- The missing Combine input type
- Your ViewController isn't a View HOT 2
- Improving Codable for enums with associated values
- Omitting Codable properties
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from iankeen.github.io.