Persistent Markers - rememberExtraLambda?

[jammer133]

Question

I have seen multiple references to persistent markers being a scoped lambda function (rememberExtraLambda), but it is not being recognized as a valid function by Android Studio. I have tried modifying the current sample app (uses 2.1.0 I believe) as well as my own test app using ver 2.0.1 of the library, both with same result. I saw there was an API documentation page on this function at one time(based on a Google search), but is now giving a 404 error, so it's been removed. Is there some documentation on this function? Or, maybe including persistent markers in the sample app would be helpful.

I've been away from Android for a long time, and just getting back to it, so it could easily be something obvious I am overlooking.

Module(s)

compose-m3

Platform(s)

Android

Platform version(s)

No response

Vico version(s)

2.0.1 & 2.1.0

[Gowsky]

Hello, @jammer133. These are two separate things. The lambda is scoped because it has CartesianChart.PersistentMarkerScope receiver, which defines an at function for adding persistent markers. On the other hand, rememberExtraLambda was a utility function that helped with memoization of ExtraStore lambdas in general. It was removed in Vico v2.0.0-beta.5, because strong skipping mode (which introduces such memoization automatically) was made default in the Compose compiler.

Here's an example of adding marker at x = 0:

persistentMarkers = { marker at 0 }

You can call at multiple times to have multiple markers. You can also access ExtraStore which is passed as an argument.

maybe including persistent markers in the sample app would be helpful.

We'll look into showcasing them there.