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QUESTION
I'm trying to add a GUI to the predator-prey simulation. It can allow users to choose which simulation(species involved) they want to do, set the simulation field size they want, and show the progress of the simulation and result.
The question is after I generate the field, I can't reset the simulation or run the next step or run the next hundred steps by clicking the buttons I set, not to mention show the progress of the simulation.
Here is the code of my GUI Class:
...ANSWER
Answered 2021-Jun-09 at 13:25Never mind... I find out where caused the problem:
I create new objects method again when I click those button, that's why the data generated by generate button is not accessed when I use rest of the buttons.
QUESTION
How to get AzureKeyVault Secret without storing the ClientSecret in appsettings.json? We have a WinForms application in .NET 5 using Dependency Injection and we want to add two services to the ServiceProvider while only requiring one SSO login prompt and removing the KeyVault secret string from the appsettings.json file.
The call to builder.AddAzureKeyVault(SecretClient, new KeyVaultSecretManager())
works when signed in to Azure with Visual Studio. This breaks when we deploy the application for a virtual machine where Visual Studio is not signed in. We can get this to work by passing in a secret
value, but we don't want to store that in either code or appsettings. How do we store the secret
in the KeyVault and then retrieve that so that we can add the AddAzureKeyVault
service?
When we log out of Visual Studio (i.e., ExcludeVisualStudioCredential = true
) then we get the following error:
Azure.Identity.CredentialUnavailableException: 'DefaultAzureCredential failed to retrieve a token from the included credentials.
- EnvironmentCredential authentication unavailable. Environment variables are not fully configured.
- ManagedIdentityCredential authentication unavailable. No Managed Identity endpoint found.
- Process "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\IDE\Extensions\gwrwzu2y.rwb\TokenService\Microsoft.Asal.TokenService.exe" has failed with unexpected error: TS003: Error, TS005: No accounts found. Please go to Tools->Options->Azure Services Authentication, and add an account to be to authenticate to Azure services during development..
- Stored credentials not found. Need to authenticate user in VSCode Azure Account.
- Azure CLI not installed
- Please run 'Connect-AzAccount' to set up account.'
Note 1: We are using SSO and can retrieve the AccessToken. So, we have access to the AccessToken.
Note 2: we are using SlowCheetah
for multiple environment configs, so we do not have ENVIRONMENT_VARIABLES setup.
From Program.cs
...ANSWER
Answered 2021-May-17 at 22:29The DefaultAzureCredential uses a number of authentication methods to support both production and development environments without changing code. So while you can use your Visual Studio, Azure CLI, or other credentials during development, you can use environment variables with service principals or managed identity in production. For VMs, managed identity is probably the easiest to configure, and for services that don't support managed identity you can use environment variables configured on your service that are authorized to access your Key Vault.
FWIW, recommended default retry settings are already the default without specifying a SecretClientOptions
instance if you want to simplify code.
QUESTION
I am pulling data from a spectrum analyzer and am trying to use the snr function from the signal processing toolbox to calculate the signal-to-noise ratio of the signal. The problem is that the value I am getting for the SNR makes no sense. I am calling the function like this:
...ANSWER
Answered 2021-Feb-12 at 04:10When I read the MATLAB documentation for snr()
, I see the following. Your input power
as sxx
is formatted incorrectly.
sxx — Power spectrum
nonnegative real-valued row or column vector
Power spectrum, specified as a real-valued nonnegative row or column vector.
The power spectrum must be expressed in linear units, not decibels. Use db2pow to convert decibel values to power values.
QUESTION
its just a question to understand if maybe the function could create some problems/fails in the large file. i have >10 users who want to read/write not exactly in the same time but nearly as a background progress with a .py script the same large file. each user has his own line where huge relation information to one other user has been written as a really large string. as example:
...ANSWER
Answered 2020-Nov-27 at 15:24You should look up Unix file management - Unix doesn't give you a great out-of-the-box solution to this problem.
The short version is that any number of processes can read the same file at once, but under most sets of permissions, any process can overwrite the file. Unlike on, say, Windows, where the OS prevents multiple programs from editing the same file at once, on Unix any write will overwrite all previous writes - if two users start from the same base file and make different changes, then whoever calls .write()
most recently will win. Yes, this does cause concurrency issues.
The answer above mentions some countermeasures - namely, enforcing file-locking at a software level in your program, which is essentially what I suggested in a comment - but to my knowledge there's no generalized solution to this issue.
Google Docs and the rest of Drive have collaborative file editing that, though the code is obviously not public, seems to use Operational Transformation as its main approach, in which, essentially, no user can directly modify the file, and instead of using typical file I/O commands each user sends the server its desired modifications and the server sorts out concurrency issues.
Maybe you should rethink the way you've designed this system? Why is all of this information stored within a single file, with each line dedicated to a specific user? Why not have multiple, smaller files, one for each user, which would cut down on the concurrency issues with reading/writing? Why not use a database to store this information instead, and let the database handle the concurrency issues? Most databases can handle arbitrarily large strings, and though some aren't easily scalable to the 30GB you mention in your question, others definitely are.
QUESTION
Welp im not a guy to quit... But ive wasted around a full day and i have not reached even close
As with one comment pointed out i kinda forgot to say what was the objective/problem, well i want to open a X window, and display a simple png image with XPutImage. When i don't use a Pixmap it scatters seemingly random pixels everywhere regardless of how i format the incoming data. When i do use Pixmap the window remains black regardless of what i have tried... Everything's compiling with some minor unused variable warning's(which i solved since pushing to the repo)
...ANSWER
Answered 2020-Nov-23 at 17:16I took a look at your code and I think the following are the problems you are experiencing.
It looks like you are trying to fix byte order issues in the function MatrizParaVetor
. It would be better to have the PNG library do that for you, so I suggest simplifying this function to the following:
QUESTION
I am new to django and python. I used a django theme to build a site. Djanog, NGINX, Gunicorn is working properly. Issue is when I try to load the page using app url, it gives me IsADirectoryError. Below is all the infomation.
Base Directory
...ANSWER
Answered 2020-Aug-12 at 21:05Django checks the url against the urlpatterns list in the sequence that they are entered.
Your current core - urls.py looks like:
QUESTION
I thought I should add a toolbar as I'll need a settings button.
So I added this to my main_activity.xml
ANSWER
Answered 2020-May-28 at 15:04Method 1:
Add the following to your dependencies in build.gradle file:
QUESTION
I'm trying to create a new column with three possible values DEF, FWD, MID.
...ANSWER
Answered 2020-Apr-26 at 16:08For spark1.5+
you can use array_contains. Only catch is that you need to create array of literals of your three lists
and use expr
to pass a column
to the value
part of array_contains
. Link to array_contains(spark docs).
In this case you don't need to do a check for MID
or create an array for it, because you can just do otherwise
to negate the others.
QUESTION
I've downloaded webserver code from https://docs.micropython.org/en/v1.8/esp8266/esp8266/tutorial/network_tcp.html, it worked well. But after adding code reading dht11 values, webserver stops responding. What's wrong with my code?
...ANSWER
Answered 2019-Jan-22 at 10:23I see two problems with your code:
First, to read the DHT11 sensor you need to use a DHT object. Try replacing
QUESTION
I am working with two workbooks. One workbook (DDwb) contains a delivery docket template and the other workbook (Rwb) contains a record of completed deliveries showing only the key delivery info from the delivery docket template.
Each new delivery appears on the template on a new row between rows 14 and 27.
This template is saved as a separate file at the end of the month. Multiple deliveries will be added over the month at different times. I'd like to catch the record of the new delivery in Rwb as it is added to the template.
In terms of the worksheet change event code, I want to copy the summary info once all the info for that delivery has been entered. For instance, cells: D14, E14, F14 and N14 contain the key summary info for the first delivery that month. I want to wait until this is all filled.
Also, I want to clean up my 'if cell value is >0' section by using the 'With' property but it gives compile errors.
How can I wait for the cells on the relevant row to be fully populated?
Here is the code I have so far.
...ANSWER
Answered 2018-Dec-04 at 09:44- I'm pretty sure this Worksheet_Change is on the private DD template (progressive) worksheet code sheet so all references to ThisWorkbook and DDwb.Sheets("DD template (progressive)") are redundant.
- You are only transferring values from columns D, E, F, L & N so only those cells need to be populated.
- You're using the
=today()
formula but I think you want a staticDate
. You can revert this if you wish. - It's unnecessary to Dim vars and open workbooks until you know you are actually going to need them.
- Disabling/enabling
EnableEvents
andScreenUpdating
within the loop is unnecessary. Disable once before the loop and re-enable after the loop is finished. - You keep wanting to open the target workbook without ever closing it. I'll assume you want to close it between actions.
- You only want to transfer the values once so you need to gather a unique list of the rows involved; not a full list of all cells in Target.
- It's usually good idea to provide some error control.
A full testing sandbox would require the artificial build of an external workbook so this has not been fully tested.
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