i have some dat files for powercobol starting with an RMKF tag at the begining of the file anyone know of a way to read them?
You can try http://www.cobolproducts.com/datafile/data-viewer.html
You might atleast get an idea of what the record layout is.
Related
Let's say I have an UIImage cached in my Cache folder:
/.../Cache/Image Cache/<firstImage.id>
Now I want this folder to only ever have 10 image cached at a time, so if a new one comes in I want to take a file and replace the entire file and not just the contents of it. I.e.
/.../Cache/Image Cache/<firstImage.id> becomes
/.../Cache/Image Cache/<secondImage.id>.
As far as I can tell, replaceItem(at:withItemAt:backupItemName:options: only replaces the contents of the file but the file name remains the same. And I'm not too sure what replaceItem(at:withItemAt:backupItemName:options:resultingItemURL:) does even though it might be what I'm looking for (I don't know what an AutoreleasingUnsafeMutablePointer<NSURL?>? was but it sounded dangerous so I decided to leave it alone, specially since it has the word "unsafe" in it).
Is there a straightforward way of doing using an in-built function or is manually deleting the old file and adding the new file the best way? Please let me know.
Thanks in advance!
I'm new to GRC. I want to modify the attached config to replace the "file sink" at the bottom of the image with "file meta sink", so I can use a program to read the header and then the complex samples. I guess I might need a different stream adapter, but it is not clear which one or how.
Help please.
Thanks,
Don
Does rails have a way to implement read streams like Node js for file reading?
i.e.
fs.createReadStream(__dirname + '/data.txt');
as apposed to
fs.readFile(__dirname + '/data.txt');
Where I see ruby has
file = File.new("data.txt")
I am unsure of the equivalent in ruby/rails for creating a stream and would like to know if this is possible. The reasons I ask is for memory management as a stream will be delivered piece by piece as apposed to one whole file.
If you want to read a file in Ruby piece-by-piece, there are a host of methods available to you.
IO#each_line/IO::foreach, also implemented in File to iterate over each line of the file. Neither reads the whole file into memory; instead, both simply read up until the next newline, return, and pause reading, barring a possible buffer.
IO#read/IO::read takes a length parameter, which allows you to specify for it to read up to length bytes from the file. This will only read that many, and not the whole thing.
IO::binread does the same as IO::read, but will open the file in binary mode.
IO#readpartial appears to be very similar or identical to IO#read, but is also worth looking at.
IO#getc and IO#gets both read from the file until they reach the end of what they'll return, as far as I can tell.
There are several more that I'm looking for right now.
I have a series of folders that all have files I need linked to the database (via there file path). One option I could do is manually insert all the file paths into my database, however, this can be painful as the number of folders will keep increasing and manual uploading will take too much time.
Is there a way to write a ruby helper function that will search these folders and automatically add the path to the files into a column in my database?
All the file paths have a recognizable pattern, for example:
Tel/a_1/poi1/names.csv
Tel/a_2/poi1/names.csv
Tel/a_3/poi1/names.csv
I need a function that will occupy a field in my database with the path of each of these names.csv files. Very new to ruby and rails, so any help is greatly appreciated. Also, please let me know if anything is unclear.
Something like this should give u all the filenames in the folder, for you to manipulate:
Dir["Tel/**/**/*.csv].each do |file|
* update attribute of your model with the path of the file
end
Read about the Dir object too.
Thats a example to get all files.
Dir["Tel/a_*/poi1/names.csv"] return a Array with path about all files.
So we have a file which has mappings like:
one/two/one.tex 27/11/85
some/other/two.tex 27/03/89
I would like all our documents to reference this file and pull out the appropriate date. For example, for one.tex, it would display 27/11/85
Any suggestion on how I can do this?
You might try the datatool package.
You can find an entire community on the TeX StackExchange, where no TeX-related question is too small.