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#Qq mac 10.7.5 code
#Qq mac 10.7.5 windows

And, you can even modify this creation time via the Windows API. It merely tracks when the directory entry was created which is sort of what ctime does.

What if I copy the file? Should the new copy have a new creation time? What if I did a copy, then deleted the original? What if I edited a file? How about if I changed everything in the file with my edit? Or I edited the file, then renamed it to a completely new name?Įven on Windows that has a file creation time, doesn't really track the file creation. Why no creation time? Because how would you define it? What if I move a file? Should there be a new creation time (By the way, ctime won't change with a move). This is the name of the user, the size of the file, the device it's on, the link count, and ironically, the mtime, atime, and ctime timestamps. This includes the various things you see when you take the Perl stat of a file. In Unix, certain file information is stored in the inode.

ctime: This is the time when the inode was last modified.

atime: This is the time the file was last accessed.

mtime: This is the time the file was last modified.

There are three time elements tracked by *nix like operating systems: I need to open directories and sort the files by the time they were created. If that is the case, you'll probably also want to use grep. I'm not sure if you want to filter out the directories also. So the default sort sort is equivalent to sort readdir($dh)

You may use the special comparison operators ( for numbers, cmp for strings) to do this for you.

The sub or block needs to return a value less than, equal to, or greater than 0 to indicate whether $a is less than, equal to, or greater than $b (respectively).

In this sub or block, you need to use the special variables $a and $b, which represent the values from the as they are compared.

#Qq mac 10.7.5 code

You can customize the sorting order by providing a subroutine or code block to the sort function. Opendir(DIR, $ARGV) #open directory for getting file list My $usage = "usage: enter name of directory to be scanned for SNP containing lines\n" Use File::stat # helps with sorting files by ctime, the inode date that hopefully can serve as creation date In response to an answer, here is another version of the script that attempts to sort the files: #!/usr/bin/perl I know that in the Finder, there is a sort by creation date option, so there must be some kind of indication for date of creation somehow attached to files in this system. In response to an edit, I should say I use Mac, OS 10.7. My = "sort-by-date-created" (readdir(DIR)) ĭo things with CPAN has a page on the sort command, but it's not very accessible to me, and I don't find the words "date" or "creation" on the page.

There is some previous postings on sorting by creation date in other languages other than Perl, such as php or java.įor example, I need to do the following: opendir(DIR, $ARGV) I assume this is a more common need than sorting by date of creation. I can find some discussion, using tags for Perl, sorting, and files, on sorting files based on date of modification.