exercises | Some exercises include : DB tools algorithm apps

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The element you are trying to click has a span tag, not a. Try the following:

The continuous deployment feature of the Azure App Service will help you avoid downtime when you update the image. Here you can see the details:

We'll pull the image and start the container, and we'll wait until that new container is running and ready for HTTP requests before we switch over to it. During that time, your old image will continue to serve requests into your app.

So maybe you enable this feature.

Yes, it is possible, although I wouldn't recommend it. You can use the following:

• Set up a string with the LaTeX code include pstricks.
• Call tex2image(..., packages = c("auto-pst-pdf", ...)) so that the LaTeX package {auto-pst-pdf} is used. This supports embedding pstricks in documents for the pdfLaTeX by calling LaTeX for the figure in the background.
• Make sure tex2image() calls pdfLaTeX with the -shell-escape option so that pdfLaTeX is allowed to call LaTeX. This is relatively easy by using the R package tinytex.

A worked example for this strategy is included below, it is called dist4.Rmd. If you copy the R/Markdown code to a file you can run:

It seems that you are missing a few commas, which in python dictionaries separate between key-value pairs. Pay attention to the additional commas in the following code:

Because when you say,

You need to change the directory properties: Right click on the "java_how_to_program_e11" and select "Properties" for the project. In the search bar type "source" and select "Java Build P...". In the resulting "Java Build Path Properties" view ... you can remove the directories from being a "source" directory. In the same properties view, you can add the subdirectores under each of the chapters as a source directory by clicking "Add Folder".

You need to use reverse to build your URL rather than hard coding it. Since you hard coded it, it is getting a 404 since the URL the test tried to post to is incorrect.

I don't know the app_name in your URLs file, you will need to add that to the reverse. For example if it was excercise it would be exercise:generate-edl.

Why can I call capitalize_first with a &&str argument?

The linked Q&A for auto-dereferencing rules is specifically for how self is resolved when using the a.b() syntax. The rules for arguments in general skip the auto-reference step and just rely on Deref coercions. Since &&str implements Deref (and indeed all references implement Deref), this &&str -> &str transformation happens transparently.

Why doesn't it work for .map() then?

Plain and simply, map() is expecting something that implements Fn(&&str) -> T and capitalize_first does not. A Fn(&str) is not transparently transformed into a Fn(&&str), it requires a transformation step like the one introduced by the closure (albeit transparently).