I am making a Qt application (4.7). Is there a way to split a file easily with QFile so that if I have a file x, I can split it equally into n parts fileX1, fileX2, ... fileXn?
As far as I know there is no in-build QFile method to split an existing file.
Depending on your use-case you can easily read the file into a QByteArray, split that into n parts and save those back to disc. (If you want an example of how to do that, just comment to this answer.)
There used to be an option to configure Qt, to build it with "large file support". Just Google for "qt large file support" (without the quotes), to see many references to this.
But I can't find any mention of this in the the Qt 4.7 Installation guide.
However, the option -no-largefile is mentioned in the page Platform and Compiler Notes - X11.
Related
I am trying to copy a file using Julia functions with the hope of manipulating the file and then use that copied version for various tasks in the Julia programming language. Can someone provide some example code of copying a file in Julia?
I guess I could do use read then write but it seems like I would be reinventing the wheel.
Is there a standard library function for this?
Inspired by this question.
Just use the built in function cp(src, dst).
Copy the file, link, or directory from src to dst. force=true will first remove an existing dst.
Afterwards you can open the file and manipulate it. Of course you could also open both source an destination files simultaneously and copy and manipulate it line by line.
I want to open a .jl file and convert it to a readable file preferably in .xls format.
I do not have any any idea about Julia language.
Is there a file opener for jl files?
I came here with the same question, but since the file I was looking at was clearly JSON data, I did some more searching.
The .jl file extension also refers to JSON lines, sometimes instead a .jsonl extension.
More here: http://jsonlines.org/
You can search for .json to Excel to find a converter, e.g. https://json-csv.com/ (this worked fine on my JSON lines file).
A .jl file is a julia script.
It is source code.
Not data.
You can open it up in any text editor, e.g. notepad on windows.
However, it won't normally contain anything useful to you unless you want to edit that code.
(It might contain some array literals that you want, I guess)
Perhaps you mean to ask "How can I open a .jld file"?
Which is a julia HDF5 file.
In which case please ask another question.
As I see, Julia is a script language therefor the file can be opened in a text editor like Notepad++, Vim, etc. Do not use word processor (like LibreOffice Writer) if you want to modify it, but it's OK if you want to read only.
To get started:
https://docs.julialang.org/en/stable/
I've got many repos containing files written with LaTeX and R with knitr so the filenames' extensions are "Rnw". Files with these extensions are not taken into account by github linguist. How can we fix that?
Tangling all the files to extract R code chunks into separate files and commit and push them is not the case, isn't it?
I've researched through linguist guidelines but haven't found the case.
I want them to be accounted as a mixture of TeX and R, if it is possible for linguist to parse the files, count bytes of R code in knitr chunks and bytes of TeX.
What you want to do is not currently possible with Linguist (v5.0.8). Linguist can only count a file towards the statistics of a single language.
As a side note:
If you want to change the language detected, you can use Linguist overrides.
If your issue was with the highlighting of the source file, you could define a special grammar for .Rnw files, with support for both R and TeX.
Plain and simple: is there a way to read (not run) .sas files on osx in order to rewrite old SAS programs in another language, e.g. R? Note I do not refer to reading sas data files – I know there are several ways, I am just interested in reading old SAS code.
.sas files containing SAS code should just be a text file. You can use any text editor that you like to open and modify these files. Since the system probably doesn't have .sas files associated with any particular program you can either use the "Open with" option when "right-clicking" on the file or you could open the editor first and then open the file from within the editor.
TextEdit will work. Another editor that I like is Komodo Edit.
Can anybody give me a hint or initial idea how may I cut a file into chunks in Qt ? Is there any particular file like java it has built in function to split. Later on I want to calculate SHA-256 hash value of each chunks. Any idea guys ??
There is no built in function for that.
Open the original file.
Open a file for the first chunk.
Read bytes from the original file.
Write bytes to the chunk file.
Repeat.
See QFile documentation.