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T4 is now in production as Quilt 3
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QUESTION
I've got a parameter pack saved as a tuple in some function traits struct. How can I find out, how many of those parameters are std::optional types?
I tried to write a function to check each argument with a fold expression, but this doesn't work as I only pass a single template type which is the tuple itself.
...ANSWER
Answered 2022-Apr-08 at 11:55You can get the size of the tuple using std::tuple_size, then iterate over all its members using a recursive template. In that template, you can pretend to construct an instance of the tuple using std::declval, get the value at the current index using std::get, and then finally get the type of that value using decltype.
Example implementation:
QUESTION
I want to start a task after my tasks have gone through five times. Is this possible in a simple way? I can't do that with a simple timer because my customers set the time in the tasks themselves. When I set a timer, the task that is supposed to start after the fifth round starts at the wrong time.
I have a program whose tasks (8 tasks) start and end one after the other. The last task then starts the first again. and I somehow need a counter that counts when the fifth round is over. So the last task must be completed for the fifth time, then this one specific task that I want to include should switch on automatically and if they is done then start the first one itself.
this is my async tasks.. it starts with button and repeats.. its only a minimized version.
...ANSWER
Answered 2022-Mar-28 at 22:54The way that you have implemented the infinite recursive loop is a bit sketchy. It should be quite difficult to maintain it. My suggestion is to remove the dependencies/interactions between the asynchronous methods, and delegate the responsibility of calling them in a looping fashion to a "master" asynchronous method, that invokes them sequentially in a while loop:
QUESTION
I have a pandas dataframe containing the following information:
- For each Timestamp, there are a number of Trays (between 1-4) out of 8 available Trays. (So there is a maximum number of 4 Trays per Timestamp.)
- Each Tray consists of 4 positions.
A dataframe could look like this:
...ANSWER
Answered 2021-Sep-15 at 07:32You can create a new dataframe with the timestamp with fixed range of position. Then you merge them together and you will end up with NaN values on errors columns for given missing position. Then you fill the NaN to 1.
Sample code:
QUESTION
I need to make a new dataframe but I don't know how to use for loop to reduce the repitition.
This is my original data frame
...ANSWER
Answered 2022-Feb-19 at 17:10Instead of filtering, add 't4' as grouping, then we don't need multiple filter in a loop and then rbind the outputs
QUESTION
I am trying to create function for formatting every tables in xlsx file.
I want to save N numbers of Tables in xlsx and formatting all the tables in xlsx file. but its formatting the first table only.
...ANSWER
Answered 2022-Feb-08 at 08:31Here is a function that formats each element of the list of data frames. With R scoping rules what they are, notice format_tbls returns a workbook object, which allows the updates that occur inside the function to be passed to the object that is eventually saved to a file.
Note: I attempted to follow the formatting shown in the original question, but I have excluded the 'Na_string' addStyle call. This probably was intended to highlight NA's in the data.frames. The current code does not do that.
QUESTION
I have created this coefficient plot. However, I cannot increase the gap between rows. I also like to add an alternative background colour of row (like row-wise grey then white then grey ) to make it easier for the reader to read the plot. Would you please support improving its visualization?
I used the following code to create this plot.
...ANSWER
Answered 2022-Jan-29 at 09:56You could play with flexible and different cex and adjust with the png parameters. This looks already better. For line-by-line gray shading we can simply use abline with modulo 2.
QUESTION
I have an extension I'm updating from VS2019 to VS2022. It's a DSL using the Modeling SDK and has code generation via T4 templates.
I have it pretty much converted but, when running the T4s, I get
...ANSWER
Answered 2021-Nov-15 at 16:02I ran into a similar issue today with my T4 templates. After looking at your post and noodling on it for a couple of minutes I tried the following
I found the file that was adding the EnvDTE assembly
QUESTION
I have a Python 3 application running on CentOS Linux 7.7 executing SSH commands against remote hosts. It works properly but today I encountered an odd error executing a command against a "new" remote server (server based on RHEL 6.10):
encountered RSA key, expected OPENSSH key
Executing the same command from the system shell (using the same private key of course) works perfectly fine.
On the remote server I discovered in /var/log/secure that when SSH connection and commands are issued from the source server with Python (using Paramiko) sshd complains about unsupported public key algorithm:
userauth_pubkey: unsupported public key algorithm: rsa-sha2-512
Note that target servers with higher RHEL/CentOS like 7.x don't encounter the issue.
It seems like Paramiko picks/offers the wrong algorithm when negotiating with the remote server when on the contrary SSH shell performs the negotiation properly in the context of this "old" target server. How to get the Python program to work as expected?
Python code
...ANSWER
Answered 2022-Jan-13 at 14:49Imo, it's a bug in Paramiko. It does not handle correctly absence of server-sig-algs extension on the server side.
Try disabling rsa-sha2-* on Paramiko side altogether:
QUESTION
I have a task that creates multiple files, if they not exists. It works, until a filename is used as item that contains a pair of square brackets. I've tried to escape with backslashes and {% raw %} tags, but it does not work.
Test playbook:
...ANSWER
Answered 2021-Dec-19 at 09:22The problem is due to the fact that creates can handle glob syntax (highlighted by @Jack). In glob syntax [ has a special meaning and need to be escaped. I did manage to do it only manually by escaping the [ through this Jinja2 filter {{ item|replace('[', '[[]') }}. I did not found an equivalent convenient filter equivalent to Python glob.escape. However it works!
QUESTION
Consider below scenario:
Thread 1
...ANSWER
Answered 2021-Dec-17 at 13:40It seems you violate standad:
33.5.3 Class condition_variable [thread.condition.condvar]
void wait(unique_lock& lock);
Requires: lock.owns_lock() is true and lock.mutex() is locked by the calling thread, and either
(9.1) — no other thread is waiting on this condition_variable object or
(9.2) — lock.mutex() returns the same value for each of the lock arguments supplied by all concurrently waiting (via wait, wait_for, or wait_until) threads.
Cleary two threads are waiting and lock.mutex() does not return same.
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