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Last week, I had a discussion with a colleague in understanding the documentation of C++ features on cppreference.com. We had a look at the documentation of the parameter packs, in particular the meaning of the (optional) marker:

(Another example can be found here.)

I thought it means that this part of the syntax is optional. Meaning I can omit this part in the syntax, but it is always required to be supported by the compiler to comply with the C++ standard. But he stated that it means that it is optional in the standard and that a compiler does not need to support this feature to comply to the standard. Which is it? Both of these explanations make sense to me.

I couldn't find any kind of explanation on the cppreference web site. I also tried to google it but always landed at std::optional...

I'm experimenting with CSS in a codecademy project, and I noticed that when I set a footer to have fixed positioning (with no left/right/top/bottom properties set), it just disappears. I would expect it to just shrink the way it does with absolute positioning, but it doesn't. Without fixed positioning the footer is there where it should be, but with it, it's gone. Why is it behaving this way?

The footer in question is selected in the CSS in the footer ruleset.

Here's the codepen: https://codepen.io/megas4ever/pen/ExwEEzv

And here's the full code:

I'm working on API, which extracts data from a web site. and the website is like - >

I want to create a UI something like this example image by using flex and without negative margin -

The challenge is that I have used float and negative margin to create the same layout. But I don't want to use a negative value to set the green div outside the content. Also, I have used the float to keep the contents around the green boxes. But I want to use flex instead of float.

So, to summarize my question - Create a reference layout that will not use any float or negative value to align the boxes in green.

I have added the code snapshot here to take a look at my HTML and CSS.

Any help would be appreciated. Thanks in Advance.

I know there are a ton of questions like this already, but none of the answers have helped me. I've listed all the suggested points at the end, please read there to see if I've missed anything.

I'm using the Google Drive C# API, and have a web site (Blazor, .NET5 in case it makes any difference) that has been working fine. I was using the client's Google credentials for this, had downloaded a JSON file (following instructions here) and all was well. When I first ran the web site in Visual Studio, I got the Google auth screen, in which I entered his email and password, and it worked. This created a JSON file in my web site which then allowed me to run the site next time without having to auth again.

In the credentials JSON file, I added the redirect URI, using the URI that VS uses when I debug the site. This gave me JSON file like this...

I updated my Asp.net core Blazor WebAssembly app to .net 6. Everything is fine, but the deploy from github actions doesn't work and throws this error:

A client wants me to add a weather forecast to his web site. The official weather report comes in an XML file and I need help accessing some of the elements in the file.

I can download the two XML files that contain the data needed on the site, and I can parse them into ColdFusion XML variables.

I can extract the data I need from the top levels, but it's lower levels that are causing me some heartburn. The XML files contain weather observations and forecasts for every location in the state. We don't need that - we just want to access the data about my client's location.

Here's a sample of the XML data I'm talking about

This is my piece of code.

Just a simple question: I'm working on a class diagram for a dynamic web site for my internship. I have an association between two classes (client and article), the relation is many to many.

Normally I have to add an association class between them, but I don't want to because the client can only read the article's writing on the web page, and he cannot post. Is it correct if I don't draw the association class on the diagram?