I have been working on Vanilla, a LaTex preprocessor. I and most people open their PDF files to see how their output looks like. But sometimes, we forget to close it down before starting the compiling process again. If the PDF file is open, then the LaTex compiler complains that it cannot write to that file. So I want to add code to the preprocessor which will look if the output PDF file is open and it will close the PDF file if it is open. I have been looking everywhere to see how to go about doing it. I am not an expert in Ruby. I don't want to kill the whole process of Acrobat32.exe or any other PDF viewing program used to view that file because the user might have other PDFs open in the same program. I just need a way to kill the process of that one PDF file. So can anyone suggest me a way to do it?
Can't you just move the old file first, remove it if possible, and then generate a new version of the same PDF with the name you want?
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I'd like to download a CSV file from JupyterLab.
It's 66MB and it shows the file is downloading, but it's split into CSV and CSV.part.
According to JupyterLab, the download has finished but they haven't combined into a single CSV.
When I open the csv.part, it says there are no applications to open it.
When I open the csv, it's empty.
I've tried re-downloading and it's always the same.
What do I do here?
Whatever application you used to download the file - a web browser? Safari? Chrome? - downloads the data into a temporary file (with .part on the end) and it is supposed to rename it to myfile.csv after the download has completed.
For whatever reason, it has not done this last step.
Simply delete the empty file myfile.csv and rename myfile.csv.part to myfile.csv. You will see a warning ("Are you sure you want to rename this?") - yes. You are sure.
There is nothing magical about file name extensions, except of course that they tell MacOS which application to open the file with. They should also give you a clear indication of what sort of data is in the file, but this is not actually enforced by anything. If you rename a file to something inappropriate for the content (e.g. if you name your file "myfile.mp3"), it simply won't load into the application as the data isn't valid. But, there is nothing special about the .part file - the name is just supposed to indicate that the download (probably) hasn't finished yet. Except in this case, I assume you know that it has.
(This seems like a bug to me, perhaps with JupyterLab - but that's beside the point).
What is the way of saving open .txt file in autohotkey. Let say you have opened text file test.txt; and you would like to close it or close it with saving any edits that you have made to that file.
I'm unable to find any method on the internet/doc. It can be a simple #1:: hotkey. It's part of larger script and this is just for testing.
Thanks xDD
I did a quick Google search of "how do Windows extensions work," but it only came up with how to change file extensions.
I was making my own file extension for an image compressor, and as of now you'd have to load the text file into a program and its processed, but in a real-world environment that's not something you want to make people use.
I'm not saying I want to build the next best image compressor but it'd be useful to understand how file extensions work.
I understand a file had content, and the content is defined for use by the extension, but when you execute a file (double click) what happens?
If I click a .x file (example), would there be a bind that has to be done in a system/environment level, to say point to a batch file that runs everything else?
Thanks in advance!
I am writing a cross-platform application which generates PDF documents and then opens them with the standard PDF viewer. On Linux, updating (re-writing) an already opened document is no problem. The PDF viewer (have tried several) updates the displayed document after overwriting the file. I don't even have to trigger anything. This comes in very handy.
On Windows, however, I cannot overwrite a PDF document opened for reading by some viewer, because the viewers seem to open the document exclusively. Of course I cannot change the code of the viewers like Adobe Reader.
Is there any solution to this? I don't want to clutter the directory with arbitrary new file names, but rather use the same file name again. Deleting of the opened file is also forbidden on Windows.
I cannot determine which PDF viewer is used. In order to open the document, I use
cmd.exe /c start <fileName>
This is only under windows env.
As I know windows os identifies associated application of a particular file by file extension.
Like wise each file (binary) starting with corresponding symbols ("starting symbols"). For an example .JPG starts with ÿØÿà. Let say I open this .JPG file in a Hex editor or a Text editor and then I change that starting symbols into another file type. for an example I can change ÿØÿà to .Eߣ (.mkv). So when I double click on the .JPG the Windows Photo Viewer says there are some errors or similar message. So I need to get some information about the application that tries to open that kind of a file. If I can, I need to open that file using the application that associated with "starting symbols".
Briefly when I open .JPG I need to open a default video player .mkv files. But It may not work for this example. Because I changed only the "starting symbols" of my .JPG.
Please give me any idea to do this.
Thanks!
When you encrypt the file, give it a new extension. e.g. Picture.jpg becomes Picture.encrypted-jpg. You then register as the handler for encrypted-jpg, decrypt the file, then launch the normal jpg handler.
When the shell is asked to perform a verb on a file, the shell does not use the contents of the file to determine which app to pass it to. The file extension is what determines how the file will be treated.
You wish to use the contents of the file to influence which app processes a shell verb. In order to do so you would need to create a launcher app that reads the file header and then decides which app to pass the file on to. You would assign your launcher app as the handler app for all file extensions that you were interested in.
Although you could do this, it would be much easier just to set the file extension appropriately.
The proper way to do this sort of thing is to replace the files with reparse points.
The downside is that this involves writing a file system filter driver, i.e., an operating system extension, which is a whole level of trouble above and beyond ordinary application programming. (Since Windows already does file encryption, I doubt it would be worth the effort.)