Comments (4)
orNull
variants of TimeZone.of
or Something.parse
probably make sense and follow the spirit of the provided link, which describes orNull
as a modifier that shows that error conditions are expected (for example, when validating user input) and must be handled.
However, why is this needed for LocalDate
? Could you please describe some situations where a programmer has values for year, month, and day, then puts these values into a LocalDate
constructor, which rejects them, but this error is not a logic error and can somehow be recovered from?
from kotlinx-datetime.
from kotlinx-datetime.
Wouldn't one want the users to know what field did they make a mistake in? null
does not say much, so custom logic would be needed anyway to show a helpful error.
Better yet, why not give the users a date picker that prevents invalid dates altogether?
from kotlinx-datetime.
Wouldn't one want the users to know what field did they make a mistake in? null does not say much, so custom logic would be needed anyway to show a helpful error.
Better yet, why not give the users a date picker that prevents invalid dates altogether?
Long-term? Probably. It's more work and probably pointless.
Short-term to get a project started in a fast & pragmatic way? No.
Also, if you rely on the browser's own date picker (HTML5 date input) some browsers may not support that. So users enter the date manually. Still needs to be checked.
Also, people understand e.g. "Your date of birth looks incorrect." just fine. There's not that much that can be wrong in a date.
I found more use-cases in my code where I use LocalDateOrNull
:
- custom date picker implementation (K/JS)
- parse date from CSV import
- parse date from custom identifier that contains a date
- GraphQL date input parsing (needs custom error message, e.g.
LocalDateOrNull(y,m,d) ?: graphError("message")
)
from kotlinx-datetime.
Related Issues (20)
- Consider adding parsing and formatting support for `kotlin.time.Duration`
- Provide custom formats for `DateTimePeriod`
- Introduce serializers corresponding to custom formats HOT 3
- Fix the ISO serializers omitting seconds when zero and emitting fractional parts in groups of three signs HOT 4
- Locale-aware formatting (but not parsing)
- Publish the design documents for datetime formats
- Update Kotlin version HOT 3
- ABI incompatible change on `kotlinx.datetime/LocalDateTime.Companion.parse` function in 0.6.0 release HOT 2
- Failed requirement on strange time zone HOT 1
- Potential improvements and input preservation in parsing and formatting error messages HOT 1
- Feature: building instant from DateTimeComponents HOT 8
- Feature: optional padding HOT 3
- InstantRange HOT 1
- Instant.parse(..) inconsistent between jvm and ios targets HOT 2
- Consider removing `Clock.asTimeSource` HOT 10
- [iOS] Fix parsing string without seconds HOT 1
- allTests Gradle task fails after adding v0.6.0-RC.2 dependency HOT 3
- Consider deprecating `DateTimePeriod.plus` and `DatePeriod.plus` HOT 4
- Consider moving `Instant` and `Clock` to the standard library
- Not supported on Android 7.0? What are the minimum supported Android and IOS versions? HOT 2
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 kotlinx-datetime.