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I am trying to understand how JavaRx's Flux.merge and switchIfEmpty work together in regards to the below code as I am a bit confused on results I am seeing which is no doubt the result of my not fully grasping Java RX.

My question is ... If the call to wOneRepository... returns an empty list or the call to wTwoRepository... returns an empty list, will the switchIfEmpty code get executed? Or will it only get executed if both calls return an empty list?

I've been using git my entire development life, and just recently got assigned to an antiquated sourcebase that is unfortunately still using IBM Clearcase for Windows for its version control. I've been struggling to get a grasp on the basics, mostly because there are many things that don't have a clear analog to git, and there isn't much support available for Clearcase since nearly every business no longer uses it.

My main problem is I can't figure out how to checkout a different branch. I've created a snapshot view of a VOB(so in git terms, a local repo cloned from a remote), and I believe I'm on the master branch. I'm looking at it in Rational ClearCase Explorer. I then open up the "Type Explorer", select the VOB I'm working with, and select "branch types". From here I can see every single branch that's been created.

Let's say I want to check out branch "my_branch". I don't see any appropriate selection from the context menu upon right-click in this Clearcase explorer. The only options are "Clone", "Delete", "Rename" and "Properties". From cleartool, I run the command

I'm learning that Golang channels are actually slower than many alternatives provided by the language. Of course, they are really easy to grasp but because they are a high level structure, they come with some overhead.

Reading some articles about it, I found someone benchmarking the channels here. He basically says that the channels can transfer 10 MB/s, which of course must be dependant on his hardware. He then says something that I haven't completely understood:

If you just want to move data quickly using channels then moving it 1 byte at a time is not sensible. What you really do with a channel is move ownership of the data, in which case the data rate can be effectively infinite, depending on the size of data block you transfer.

I've seen this "move ownership of data" in several places but I haven't seen a solid example illustrating how to do it instead of moving the data itself.

I wanted to see an example in order to understand this best practice.

I just began learning Airflow, but it is quite difficult to grasp the concept of Xcom. Therefore I wrote a dag like this:

new to programming and not quite grasping how this is wrong, any advice is appreciated.

Pardon my less than perfect title but having some issues grasping this.

So here's the manually created data. There are three fields; state, codetype, and code. The reason for this is that I am trying to join a more expansive version of this to a data frame consisting of 1.6 million rows and running into an issue of not having enough memory. My thought process is that I would greatly lower the number of rows in this table; industry.

So I have 4 tables

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I'm learning the Go language by following a tutorial. Not wanting to just blindly copying the examples, but understanding what's going on, I came accross the following puzzling case:

In the tutorial the import statement was written as:

Error: Runner[463:34314] flutter: LateInitializationError: Field 'name' has not been initialized.

I recently updated to using firebase core and nullsafety and made some changes to my code that I don't quite understand, I'm new to programming here. Any way, I've tried reading this similar thread here about it but I still don't quite grasp it. I understand that I am not using name properly in the initstate most likely but that is as much as I understand. Can someone please provide an example code of what's needed to solve for the error below?

2021-04-10 17:59:41.331476-0700 Runner[463:34314] flutter: LateInitializationError: Field 'name' has not been initialized.