[SOLVED] [Bash] Totalling & Averaging in one go

konsolebox · 07-04-2013, 07:54 PM

Quote:

Originally Posted by grail

And here is a Ruby option:

And I was actually expecting Ruby to be best with it. And as I imagined how it could be done in Awk, with formats like that where we still let the shell produce the file list, it would be possible only that if we are to test if a file is a file, we already have to use the system() function.

grail · 07-05-2013, 02:08 AM

Actually I think you could use co-process (here) option with stat to send and retrieve the data in awk.

konsolebox · 07-07-2013, 03:08 AM

I don't think you would have to go as far as using co-processes since you don't have to send data back. Still as implied you would use getline much like how you could do it here.

Code:

cmd = "stat -c '%y' " file
if (cmd | getline timestamp) {
    ...
    close (cmd)
}

Yet that was actually not what I was concerned for. The problem was how you could test if a file is a file from multiple arguments. And directories are very irregular with their timestamp.

Probably we could make use of "find -type f [-maxdepth 1]", though in Bash as requested that would no longer be necessary.

As for sorting in Awk if numbered indices are not sorted by default with (i in a), we could make use of asort() but that function is still new.

grail · 07-07-2013, 05:16 AM

Well Ruby easily handles the file only option:

Code:

if File.file?(f)

konsolebox · 07-07-2013, 05:32 AM

True for Ruby