use warnings;
use strict;

open OUT, '>', 'delme.txt';
print OUT <<TEXT;
1) how can someone know what is the current edited file's name ? quest
+ion
TEXT
close OUT;

@ARGV = ('delme.txt');
$^I = ".bak";

while (<>) {
    if ($. == 1) {
        print STDOUT "File geing processed is $ARGV\n";
        open OUT, '>', $ARGV or die "Can't open $ARGV: $!";
        print OUT <<"            NEWTEXT";
            2) can someone make modifications on that file, isnt it al
+ready opened by the <> diamond operator?
            NEWTEXT
    }
    
    print;
    print STDOUT;
}

close OUT;
print "\n";
open IN, '<', 'delme.txt';
print <IN>;
close IN;

[download]

Prints:

File geing processed is delme.txt
1) how can someone know what is the current edited file's name ? quest
+ion

            2) can someone make modifications on that file, isnt it al
+ready opened by the <> diamond operator?

[download]

which shows that the file can be reopened. Notice though that the close must be after the magic file processing has happened in the while loop (close OUT; is after the while loop). If the close is in the same block as the open OUT the "update" gets replaced by the loop version of the update.

Not sure where that would be useful however!

DWIM is Perl's answer to Gödel

In reply to Re: diamond operator current filename by GrandFather
in thread diamond operator current filename by spx2

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.