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Beryl Klein

Questions by Beryl Klein

No authenticationScheme was specified, and there was no DefaultChallengeScheme found with default authentification and custom authorization?

I have a .NET Core 2.0 app and have a problem with authorization. I want to use custom authorization with special re...

How can I open a .tex file??

I'm trying to open a .tex file. I'm not sure I've got to the bottom of the (possibly) surprisingly complex process....

SQL Server: Get data for only the past year?

I am writing a query in which I have to get the data for only the last year. What is the best way to do this? SELEC...

Should I use Bootstrap from CDN or make a copy on my server??

What's the best practice of using Twitter Bootstrap, refer to it from CDN or make a local copy on my server? Since ...

How to remove frame from matplotlib (pyplot.figure vs matplotlib.figure ) (frameon=False Problematic in matplotlib)?

To remove frame in figure, I write frameon=False works perfect with pyplot.figure, but with matplotlib.Figure it...

Unable to load DLL 'SQLite.Interop.dll'?

Periodically I am getting the following exception: Unable to load DLL 'SQLite.Interop.dll': The specified module co...

How to downgrade from Internet Explorer 11 to Internet Explorer 10??

As a developer, I found the new Internet Explorer version to be a complete nightmare. I turned the windows feature ...

How can we make list-group horizontal with Bootstrap 4?

With Bootstrap 4, the list-group component is very rich with design aesthetics, such as with borders, background col...

How can I detect whether a variable exists in Flask session??

I would like to detect if a session['logged_in'] key exists, which means my user has already logged in. For Example...

Difference between & and && in C??

What is the difference between & and && in C? My teacher gave me this example: int a = 8; int b = 4; p...

Create list of single item repeated N times?

I want to create a series of lists, all of varying lengths. Each list will contain the same element e, repeated n ti...

Python pandas Filtering out nan from a data selection of a column of strings?

Without using groupby how would I filter out data without NaN? Let say I have a matrix where customers will fill in...

how to realize countifs function (excel) in R?

I have a dataset containing 100000 rows of data. I tried to do some countif operations in Excel, but it was prohibit...

How can I center <ul> <li> into div?

How can I center an unordered list of &lt;li&gt; into a fixed-width div? &lt;table width="100%"&gt; &lt;tbod...

How do I close all open tabs at once??

If I have 10 tabs opened, I have to close each one using ":q" separately. How can I close them all at once? ...