v2 | v2 - a minimalistic , high-performant 2D vector class

I run a loop and append data into a list. I failed to convert the list to a data frame in the loop and only able to fix that in a later step and turn every 3 columns into a new row. I was wondering if I can transform a list into a data frame during the loop session.

I have a custom animation that the regular Vue transition doesn't quite cover. I have it implemented elsewhere with a conditional v-bind:class, but that doesn't work well for conditional v-if blocks or v-for groups.

I need to add a class ('open') one frame after the element is entered as with v-enter-to, but I need it to never be removed from the element.

I then need it removed removed when leaving to trigger the closing animation.

Am I using Vue Transition wrong and this is perfectly possible within transition, or is there a way to add/remove the class around the enter/leave functionality?

I have run a topology, and I used the Meter type in metric Reporting API v2. In the execute method I mark this metric. So it will mark an event whenever the execute method is called. But when I compare this value with the __execute-count, I see huge differences. Does anyone know why this happens?

These are the values from my log which are gathered at the same time:

9:v7 __execute-count {v0:v7=44500}
9:v7 tuple_inRate.count 664129

Update: When I use the mark method on the Meter metric, I will get different results in comparison with the Counter metric. But still, I do not understand why the values from the counter metric (tuple counter) are not the same as the __execute-count.

So I was really ripping my hair out why two different sessions of R with the same data were producing wildly different times to complete the same task. After a lot of restarting R, cleaning out all my variables, and really running a clean R, I found the issue: the new data structure provided by vroom and readr is, for some reason, super sluggish on my script. Of course the easiest thing to solve this is to convert your data into a tibble as soon as you load it in. Or is there some other explanation, like poor coding praxis in my functions that can explain the sluggish behavior? Or, is this a bug with recent updates of these packages? If so and if someone is more experienced with reporting bugs to tidyverse, then here is a repex showing the behavior cause I feel that this is out of my ballpark.

I am modeling a Time-constrained CVRP. The problem is to minimize the total travel time (not including the package dropping time) subject to vehicle (delivery) capacity and total time spent (per vehicle) constraints. The package dropping time refers to an additional time to be spent at each node, and the total time spent equals to the travel time plus this additional time. I have the below model that works for a single vehicle-type case. I would like to introduce two-vehicle type concept in there, meaning that I have a set of V1 type vehicles and another set of V2 type vehicles. The only difference of the vehicle-types is the per time cost of travel. Let x denote the per time unit cost of travel by V1, and y denote the per time unit travel cost of V2. How can I design the model so that it incorporates this additional aspect?

I am building an app following the Rest Countries API challenge from frontendmentor. I have run into a problem. When trying to find the border countries full name using the alpha3code, I get the error : TypeError: Cannot read property 'name' of undefined.

My intention is to get the weather data for the selected country, passing selectedCountry.capital to the query, so it is displayed the weather from current country capital when the data of a country is displayed.

The problem is my code tries to render the weather data before the weather array is fetched, resulting in an error.

TypeError: Cannot read property 'temperature' of undefined

I get the array data

I just reinstalled Fabric Samples v2.2.0 from Hyperledger Fabric repository according to the documentation.

But when I try to run asset-transfer-basic application located in fabric-samples/asset-transfer-basic/application-javascript directory by running node app.js the wallet is created and an admin and user is registered. But then it tries to invoke the function as given in app.js and shows this error

SpringBoot v2.5.1

There is an endpoint requesting a long running process result and it is created somehow
(for simplicity it is Mono.fromCallable( ... long running ... ).

Client make a request and triggers the publisher to do the work, but after several seconds client aborts the request (i.e. connection is lost). And the process still continues to utilize resources for computation of a result to throw away.

What is a mechanism of notifying Project Reactor's event loop about unnecessary work in progress that should be cancelled?