I am looking for a way to remove parts of my file names (big folder). I don't want to rename them all but I merely want to have an output of the edited file names in a text document or clipboard.
They all follow the similar pattern. The initial part of my file names are randomized by the system. I am not sure how to proceed in terms of what to use to complete the first part. Here is an example filename:
1231230#p9999_w_e_aa.jpg
I want to extract 9999 part (the part between the #p and the first underscore).
The machine I'm currently working from is running Windows 7.
Related
I currently have a folder which has photos dumped into it, I am looking to delete all files that do not contain a specific word (which is present in all file names in which I want to keep).
I am hoping this can be done with power automate as there is 100's of photos and I want to improve its efficiency.
I look forward to learning from somebody!
Image below, it seems the flow ran successfully.
enter image description here
You could use a Get files (properties only) action and use a filter array afterwards. In the filter array you could check if the Name field does not contain your keyword.
After that you can loop through the results of the filter array and delete the files based on the {Identifier} field.
Below is an example of that approach
Test it properly, because you are deleting files. Otherwise restore from the first or second stage recycle bin ;)
I have a very large data file, about 32GB. The file is made up of about 130k lines, each of which mainly contains numbers, but also has few characters.
The task I need to perform is very clear: I have to extract 20 lines and write them to a new text file.
I know the exact line number for each of the 20 lines that I want to copy.
So the question is: how can I extract the content at a specific line number from the large file? I am on Windows. Is there a tool that can do such sort of operations, or I need to write some code?
If there is no direct way of doing that, I was thinking that a possible approach is to first extract small blocks of the original file (so that each block contains one or more lines to extract) and then use a standard editor to find the lines within each block. In this case, the question would be: how can I split a large file in blocks by line on windows? I use a tool named HJ-Split which works very well with large files, but it can only split by size, not by line.
Install[1] Babun Shell (or Cygwin, but I recommend the Babun), and then use sed command as described here: How can I extract a predetermined range of lines from a text file on Unix?
[1] Installing Babun means actually just unzipping it somewhere, so you don't have to have the Administrator rights on the server.
Seems like it must be easy, but I just can't figure it out. How do you delete the very last character of a file using Ruby IO?
I took a look at the answer for deleting the last line of a file with Ruby but didn't fully understand it, and there must be a simpler way.
Any help?
There is File.truncate:
truncate(file_name, integer) → 0
Truncates the file file_name to be at most integer bytes long. Not available on all platforms.
So you can say things like:
File.truncate(file_name, File.size(file_name) - 1)
That should truncate the file with a single system call to adjust the file's size in the file system without copying anything.
Note that not available on all platforms caveat though. File.truncate should be available on anything unixy (such as Linux or OSX), I can't say anything useful about Windows support.
I assume you are referring to a text file. The usual way of changing such is to read it, make the changes, then write a new file:
text = File.read(in_fname)
File.write(out_fname, text[0..-2])
Insert the name of the file you are reading from for in_fname and the name of the file you are writing to for 'out_fname'. They can be the same file, but if that's the intent it's safer to write to a temporary file, copy the temporary file to the original file then delete the temporary file. That way, if something goes wrong before the operations are completed, you will probably still have either the original or temporary file. text[0..-2] is a string comprised of all characters read except for the last one. You could alternatively do this:
File.write(out_fname, File.read(in_fname, File.stat(in_fname).size-1))
I'm trying to accomplish something that will let a user download a file from a web application onto their system. The file will contain a unique five digit code. Using this unique five digit code the users can search for a file in their file system.
I'm wondering where is the best place to put this five digit code in a file so that users can easily search for the file. The simplest approach would be to put it in the name of the file, however, users can change the name of the file easily.
I'm looking for a filed where I can put the code so that users won't be able to modify it but will still be able to search for it. Is this possible?
If you say File.. what kind of file format do you mean. I'm asking because a file is just a pile of bytes and you can append your 5 digit code every where in the file, if it is your own file format. But if you tell us which file format you use, probably there are some fields which can be used to search for it. As example Tiff has many tags. Images have other meta data. etc
If I wanted to create a string which is guaranteed not to represent a filename, I could put one of the following characters in it on Windows:
\ / : * ? | < >
e.g.
this-is-a-filename.png
?this-is-not.png
Is there any way to identify a string as 'not possibly a file' on Linux?
There are almost no restrictions - apart from '/' and '\0', you're allowed to use anything. However, some people think it's not a good idea to allow this much flexibility.
An empty string is the only truly invalid path name on Linux, which may work for you if you need only one invalid name. You could also use a string like "///foo", which would not be a canonical path name, although it could refer to a file ("/foo"). Another possibility would be something like "/dev/null/foo", since /dev/null has a POSIX-defined non-directory meaning. If you only need strings that could not refer to a regular file you could use "/" or ".", since those are always directories.
Technically it's not invalid but files with dash(-) at the beginning of their name will put you in a lot of troubles. It's because it has conflicts with command arguments.
I personally find that a lot of the time the problem is not Linux but the applications one is using on Linux.
Take for example Amarok. Recently I noticed that certain artists I had copied from my Windows machine where not appearing in the library. I check and confirmed that the files were there and then I noticed that certain characters in the folder names (Named for the artist) were represented with a weird-looking square rather than an actual character.
In a shell terminal the filenames look even stranger: /Music/Albums/Einst$'\374'rzende\ Neubauten is an example of how strange.
While these files were definitely there, Amarok could not see them for some reason. I was able to use some shell trickery to rename them to sane versions which I could then re-name with ASCII-only characters using Musicbrainz Picard. Unfortunately, Picard was also unable to open the files until I renamed them, hence the need for a shell script.
Overall this a a tricky area and it seems to get very thorny if you are trying to synchronise a music collection between Windows and Linux wherein certain folder or file names contain funky characters.
The safest thing to do is stick to ASCII-only filenames.