Re^5:Sorting names using Regular Expressions and placing them in different Files.

[Kiran Kumar K V N]

There is a File <Input>. Following is the data in the Input File :-

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000

I can extract this and place the data in corresponding Output File viz.:- BSC. The O/P in File BSC is also shown as :-

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000

Now how do I get the following Output from the same above Input File :-

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000 -rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 20041202143000

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000 -rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 20041204110000

How should I go about it ??

[talexb]

What are you trying to do?

All I can see is repeated lumps of this data:

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000
-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000

What transformation are you trying to effect, if any?

[Kiran Kumar K V N]

Hi Alex,

Let me make it very clear. I have the following data in my Input File as :-

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000

Now how do I get the following Output from the above Input File :-

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000 -rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 20041202143000

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000 -rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 20041204110000

That is, in my output File :-

I should have one Filename as BSC-20041202143000 and the other one printed simultaneously as 20041202143000

For second one, I should have the Filename as BSC-20041204110000 and the other one as 20041204110000

How should I go about it ?? Please let me know your valuable view/opinion..

[talexb]

OK -- so you want to delete the 'BSC-' and display the original, followed by the new version. The following code does that:

#!/usr/bin/perl -w

use strict;

{
    while(<DATA>) {

      #  Read a line, copy it, and delete 'BSC-' in the copy.

      chomp;
      my $copy = $_;
      $copy =~ s/BSC-//;

      #  Print the original line and the copy.

      print "$_ $copy\n";
    }
}

__DATA__
-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000
-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000

On my system, it produces the following output:

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000 -rw-rw-r
+w- 1 bsmbin bsmbin 303 Dec 3 02:06 20041202143000
-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-20041204110000 -rw-rw-r
+w- 1 bsmbin bsmbin 303 Dec 4 23:00 20041204110000

Now, you've had a bit of a rough time in the Chatter Box lately .. I recommend that, unless you have a quick question, don't bother asking there. Post a node instead, explaining a) what you are trying to do, b) the approaches you've tried and c) where you think you're stuck. Then don't complain your node isn't getting any replies -- that's only going to reduce the chances you'll get replies.

And when in doubt, make your examples as simple as possible. Trying to wade through

-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 3 02:06 BSC-20041202143000

is tough .. I would have suggested just trying to change

BSC-20041202143000

to

20041202143000

And for that, just reading Learning Perl or a couple of pages on this site should have helped you solve the problem.

Good luck.

[g0n]

Try working up a very basic case to narrow down the functionality you are having trouble with. Something like this:

use strict;
use warnings;
my $var = "-rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 BSC-200412041100
+00 -rw-rw-rw- 1 bsmbin bsmbin 303 Dec 4 23:00 20041204110000";

my ($transformed) = $var=~s/BSC-//;

print $var . " " . $transformed . "\n";