Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

Re^3: removing lines that are in the end of a file

by BrowserUk (Pope)
on Apr 19, 2013 at 12:46 UTC ( #1029505=note: print w/ replies, xml ) Need Help??


in reply to Re^2: removing lines that are in the end of a file
in thread removing lines that are in the end of a file

This also removes the last line with SIL. This is not how i wanted

ReadBackwards() has to do strange things with tell, so a little extra work is involved. Try this version:

#! perl -slw use strict; use File::ReadBackwards; my $file = $ARGV[ 0 ]; tie *BW, 'File::ReadBackwards', $file; my $lastpos = -s( $file ); my $len = 0; while( <BW> ) { $len = length() +1; next unless length >1; last unless /SIL/; $lastpos = tell( BW ); } truncate $file, $lastpos + $len; close BW;

Note: You won't need the +1 in the  $len = length() +1; line if you are not on Windows.


With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.


Comment on Re^3: removing lines that are in the end of a file
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1029505]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (8)
As of 2014-09-18 18:42 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    How do you remember the number of days in each month?











    Results (120 votes), past polls