Re^2: changing date format in and out

[gio001]

Thanks,
well I understand and I agree that I will have to execute in a loop, what I am trying to learn is a way to create the while loop inside the perl world and not issue thousands of invocations to perl from a straight unix ksh loop, if you understand what I mean.
So can you please illustrate for me how can I structure an invocation statement(s) to perl with an incoming file name, an output file name and the real while loop as the core of what I will ask perl to execute for me?
Thanks !

[McDarren]

The example that was given to you is the guts of what you are asking for.

Take the code that was given to you by mr_mischief, and save it in a file (lets call it foo.pl). Then just pass your input file through that, ie:

perl foo.pl < infile > outfile

Although, you will probably want to change the line:

print (gmtime $_);

to read:

print scalar gmtime($_);

Or alternatively, if you want your output in local time, then:

print scalar localtime($_);

Hope this helps,
Darren

[gio001]

Great, thanks a lot!
I hope not to impose on you for a very last favor, how would it be possible to consolidate this logic into a single perl line command (a one liner)?
I hope you can show me, thanks again!

[McDarren]

perl -ne 'print scalar localtime' < infile > outfile

Notes:
- the "-n" switch, causes perl to assume a "while <>" loop (see perldoc perlrun)
- the $_ can be dropped, because it is implicit
- there is no need to chomp, as you probably want the newline anyway


Cheers,
Darren :)

[Anonymous Monk]

Abandon KSH