my $file = "c:/test.txt";

# open file for both reading and writing
open FILE, "+<$file" or die "Can't open $file: $!\n";
my @file = <FILE>;         # get all data
make_backup($file, @file); # make a backup
seek FILE, 0, 0;           # go to beginging of file
truncate FILE, 0;          # delete all the old data

# now write only the lines we want back to file
# the newlines are still attached to each line
for my $line (@file) {
    print FILE $line unless $line eq "don't print\n";
}
close FILE;

# sub to write a backup
sub make_backup {
    my $file = shift;
    open BACKUP, ">$file.bak" or die "Can't write $file.bak: $!\n";
    print BACKUP @_;
    close BACKUP;
}

[download]

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

In reply to Re: remove new lines in flat files by tachyon
in thread remove new lines in flat files by wickedxter

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.