typematch | A small TypeScript library to do pattern | Functional Programming library

Upd!

With Flutter 2 release downgrading SDK is not the best workaround in longer term. The right thing to do is going through dependencies and updating them, you can use flutter pub outdated terminal command to highlight available updates - then change pubspec.yaml with newer versions and try running your app. It might happen that some dependencies won't have the updates or fixes for the breaking changes in Flutter SDK. In this case you'll be locked into using older Flutter (until the dependency is updated or you replace it with some other package).

Orig

Run flutter downgrade

Received same error right after upgrading. Switching from Flutter 1.26.0-12.0.pre • channel dev to the previous verion (1.26.0-8.0.pre) made the build work again

This is a quickfix in case you are not in a mood to go through dependencies in pubspec.yaml updating them to newer ones (hoping there're updates to null-safety) but just want to carry on from the place you left. Eventualy you'll have to go through all your packages/plugins and update/replace them with nullsafe versions.

With the null safety you don't really need to use the getOrElse or two separate functions Instead you could just convert your string into a nullable String by adding ? to it

There are a couple of problems with your approach.

First, you are testing an async method but you are not awaiting it. This is going to cause the raw Future object to be returned to the expect function which is going to consider it a successful call, even if the future ends up throwing an error. You will need to await your call, although doing so as a closure passed to expect is awkward. I would suggest wrapping the asynchronous call in a try/catch instead.

Second, you are providing a closure to Mockito's thenThrow method. This method takes whatever you give to it and uses it as the actual thrown value, so it isn't going to call the closure you passed to it - it will just throw it as-is.

Fixing these both, you end up with this:

Your _NavBarDesktopState global key needs to be initialized in your _NavBarDesktopState class., not the NavBarDesktop class. It's trying to set the global key before the state has even been created.

The short answer is no; similarly to the answer in can we use multiple @PlanningSolution classes and multiple SolverManager in Springboot optaplanner, each type of a planning problem requires a new solver configuration which defines the constraintProviderClass.

The optaplanner-spring-boot-starter supports only a single solver configuration and thus only a single type of a planning problem.

Your context was never assigned. You are calling Navigator using that context while it is still null. Try to assign it with the context from the page when it is built.

TDLR: imports file only using

The code example from Meteor-Files doesn't export anything as a module, so when you import the default export, you get an empty object {}.

Additionally, as the example explains, that code should be on the server side only, which means you can't import it on the client.

I would solve this by having three files:

All you have to do is just put the widget that extends State so for your example, since the class is called MyAppState, I'm assuming it extends State so, therefore: