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I am trying to conditionally swith shiny output render types in a flexdashboard tab using conditionalPanel as outlined in the Shiny documentation here, by using a reactive output object and making sure it is returned to the browser by using outputOptions(output, [myOutputName], suspendWhenHidden = FALSE). This approach has been suggested in several SO anwsers (e.g. here and here) for full-fledged Shiny apps but I could not find an example for their use in a Shiny document (R markdown). Essentially, I want to test if a selected data set has a certain column (i.e. the column is not null), and make the UI conditionally render the plot based upon the presence of this column. In the toy data below, the list has a known number of items, and it is known which ones have the missing column. When running the document locally, the desired behavior is there (i.e. the set will switch based upon the selection and the conditionalPanel appears to show what I would like it to show), but still the inspector shows the errors that I listed below. Publishing on rstudio connect leads to the interface just not being rendered (because of the same errors, I presume). Are these errors (Error evaluating expression: ouput.evalseplen == true and Uncaught ReferenceError: ouput is not defined) in the inspector a known shiny bug? Or is something deeper going on?

I want to write a function that simply validates the syntax of an XPath expression independent of any XML/HTML (so it would catch something like //p[text(}="Hello"] as having a typo), but I can't seem to find a full fledged XPath specification.

Follow Up: It seems I should follow up so people don't think I'm crazy. I'm trying to write a Rust procedural macro for catching malformed xpaths at compile time, as sort of a convenience feature to build into Rust Selenium bindings (see thirtyfour or fantoccini on crates.io) so that one doesn't have to get 20 minutes into their test suite before Selenium crashes to tell them they have a typo like with the other language bindings. I'll probably end up doing FFI out to a well-maintained library in another language (actually https://crates.io/crates/libxml might do the trick), but I thought I'd at least see what the workload would be to write this myself.

I have a Vaadin 7 application where I originally had just one UI. The following things happened, which I did not mind and even liked:

1. When installed new WAR file, all browser tabs currently opened to that URL gave the black "Connection failed" or "Session expired" error, forcing me to refresh. Also, I would often get a "server loading" error in the upper right corner while the application deployed. This one is kind of hard to explain, but hopefully this makes sense. None of this was triggered by my code directly, all of it was behavior I got from Vaadin out of the box.
2. If I was logged in to the same website (and same user) in multiple browser tabs, and then logged out of one tab, my code to logout/inactivate all tabs worked great - they all went back to the login screen, as I coded them to.

At that time, I had web.xml as follows:

I use react-router-dom, but when i click on the button, the page is rendered on top of the main one.

I do not need a full-fledged menu with a page transition. I have a button in the component and when I click it, I need to go to the next pageenter image description here

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What API in Android is used to make reliable audio calls in custom app? I see for example in WhatsApp, that it gets notification about incoming call (probably from Firebase?), and then acts like "real call" (you can see active call within Bluetooth headset interface, which you can accept, reject or hang up, and if someone calls you via classic voice call, it will be automatically hanged up as busy). I didn't found any documentation about this, and found only full-fledged SDKs.

Say, I have the following minimal API:

I have a Person object which has 20 fields and stored in dynamoDB. I want to create a new Person object based on some input, check if the same object exists in the Database or not. If it exists, I want to compare the 2 objects on the basis of 19 fields out of 20. The field to ignore is a boolean flag check.

I am using Lombok @Data to generate the equals method.

Is there a way to do this without having to write a full fledged overriden equals method myself ?

I want to unit test my controllers security using the method based security when I've checked the docs I've found this but it uses @RunWith and it doesn't seem to be loading only the security config.

What I tried to do: Loading my secuirty config

I have configured 1 master 2 workers. after installation successfully kubernetes. It is OK with worker1 joining cluster but I can not join worker2 to the cluster because kubelet service is not running. It seems like the kubelet isn't running or healthy

sudo kubectl get nodes:

NAME STATUS ROLES AGE VERSION
master1 Ready control-plane,master 23m v1.22.2
node1 NotReady 4m13s v1.22.2

I want to know why the kubelet service is not running.

Here kubelet logs.