Hi Ambuli,
a few comments on your code:
On Friday 20 May 2011 14:37:52 Ambuli wrote:
> Here i paste a perl script to delete last Two Lines. If you want
> delete more lines in a file you can specify it.
>
>
Always start with "use strict;" and "use warnings".
> use File::ReadBackwards;
Include some empty lines between logical paragraphs of your code.
> my $filename = 'test.txt';
This is better specified as a command line argument
> my $Lines_to_truncate = 2; # Here the line to truncate is mean Remove
> only Last Two Lines
The style of your variable name is very strange. It should be:
[code]
my $num_lines_to_truncate = 2;
[/code]
Also consider specifying it using Getopt::Long.
> my $bw = File::ReadBackwards->new( $filename )
> or die "Could not read backwards in [$filename]: $!";
The "or die" should be indented.
> my $lines_from_end = 0;
> until( $bw->eof or $lines_from_end == $Lines_to_truncate )
> {
> print "Got: ", $bw->readline;
> $lines_from_end++;
> }
The print here is redundant and only adds noise and clutter to the output.
> truncate( $filename, $bw->tell );
It would be safer to keep track of the position, then destroy $bw, and only
then truncate the file.
Regards,
Shlomi Fish
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