Unsync | Turns synchronous functions into asynchronous functions | Reactive Programming library

I have to change the children list every time the enum variable property is changed from widget editor.

None of the functions I've tried so far seem to have worked (virtual void OnEndEditByDesigner(); virtual void PostEditChangeProperty(struct FPropertyChangedEvent & PropertyChangedEvent)).

SynchronizeProperties docs state that

It can also be called by the editor to update modified state, so ensure all initialization to a widgets properties are performed here, or the property and visual state may become unsynced.

So I'm not entirely sure that it is the right function to use/overwrite (as it only "can" be called by the editor to update modified state, not will be called on property editor edit)

Here is some sample code to show an example of what I've been trying to do so far.

Sample code:

SampleButton.h

I'm looking to read from std::in with a syntax as below (it is always int, int, int, char[]/str). What would be the fastest way to parse the data into an int array[3] and either a string or char array.

As a competitive programmer, I've always used ios::sync_with_stdio(0); to speed up cin and cout. But I've also seen other people use optimizations like cin.sync_with_stdio(0); or cout.sync_with_stdio(0);. For example, the latter two were used in this website: https://usaco.guide/general/fast-io?lang=cpp.

I know that ios::sync_with_stdio(0); unsyncs iostream(cin and cout) from stdio(scanf and printf), so why would someone unsync only the input cin or only the output cout when doing competitive programming (which usually has a large amount of both input and output)?

I'm working on a script and need to query the size of a specific stream before I do a sync to a local harddrive. The local unsynced folder is empty. I know there is a p4 sizes and I have tried the following command

I am integrating in app purchase in my flutter application through RevenueCat and to support both Android and IOS. I have followed all the steps mentioned in the documentation for configuration (https://docs.revenuecat.com/docs/creating-play-service-credentials), added subscription details, created entitlements, offerings, products in revenue cat dashboard.

In code initiated the revenue cat platform in main.dart, fetching the offerings and getting correct data, initiated purchase and it is showing payment successful but as soon as it comes back to application it is showing the error (attaching the log below) :

I'm thinking about an approach to use the IDisposable pattern to synchonize/coordinate access to a shared resource.

Here's my code so far (easy to run with LinqPad):