Beefy Boxes and Bandwidth Generously Provided by pair Networks Cowboy Neal with Hat
We don't bite newbies here... much
 
PerlMonks  

How do I append or write to the end of a file?

( #1882=categorized question: print w/ replies, xml ) Need Help??
Contributed by vroom on Jan 08, 2000 at 08:46 UTC
Q&A  > files


Answer: How do I append or write to the end of a file?
contributed by Crulx

open FH, ">>$output_file" or die "Couldn't open file: $!";

Opens a file for appending.

In an already open file for writing,

seek FH,0,2;

After you get to the end via those methods, simply

print FH "What you want to print\n";
Answer: How do I append or write to the end of a file?
contributed by punksk8er

Another mehod of doing so is a bit longer, but of which I prefer at the moment.

#!/usr/bin/perl -w use strict; open (FILE, "file") || die "File does not exist\n"; my @file = <FILE>; my $file = @file; close (FILE); open (FILE, ">file") || die "File does not exist\n"; for (my $n = 0; $n <= $file; $n++) { $_ = $file[$n]; print FILE $_; } print "add whatever"; print "here\n"; print "to end of txt.\n"; close (FILE);


I prefer this method because I do not have to make extream changes to edit the lines of the file as I go.

Please (register and) log in if you wish to add an answer



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (9)
    As of 2013-05-22 02:47 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The best material for plates (tableware) is:









      Results (453 votes), past polls