Hi all,
I had a question using Perl's readdir(). I want to gather all the files in a directory that have the same prefix file name I specified. So, for each prefix, I need to use Perl's readdir() to grep all related files.
Suppose the prefix is "abc", there are several files with the names "abc_1", "abc_2", etc.
However, I noticed that if I put opendir, closedir outside of a loop (loop through a list of file name prefixes), I can only grep the very first prefix from the dir -- all the following grepping failed. If I chose to call opendir and closedir each time in the loop, it worked fine but I'm afraid it is not efficient at all.
My question is how can I make it more efficient? It is weird that I can't call readdir multiple times in a loop.
Thanks a lot in advance!
-Jin