Hi. I want to be able to update only one line in a file that matches a key using sed, but I can't seem to get this (the key is right at the beginning of each row)
Here is what I have tried so far, but every row is being updated. I want the end result to be that the input file only has the single... (6 Replies)
Hi Friends,
REQUIREMENT: Want to delete files from the current directory match with the same in the file test.txt
set -x
i=1
echo "i=$i"
COUNT=`sed -n '$=' test.txt`
echo "Count=$COUNT"
while
do
"## Here is error##"
FILETOREMOVE=`sed -n \'$i,1p\' test.txt`
echo $FILETOREMOVE... (5 Replies)
I want to use sed command to delete a matched row with a pattern.
And I also want to delete previous and next row of that row.
Which option can I use with sed ? (9 Replies)
I wrote script in bash which generates this report:
phrase1;phrase2;phrase3;phrase4;phrase5;phrase6;phrase7;phrase8
phrase9;phrase2;phrase10;phrase4;phrase11;phrase12;phrase13;phrase14
phrase15;phrase16;phrase17;phrase18;phrase19;phrase20;phrase21;phrase22
...
I would like add name only... (3 Replies)
I have a file with millions of rows that I need to add a delimiter and a new field with a zero to the end of each row. (its too big to open and do a find and replace regex)
I'm looking for the next line '\n' and need to replace it with a Unit Separator (hex \037) 0 \n.
I've tried the... (2 Replies)
Hi,
Tried to look for solution, and found something similar but could not adapt the solution for my needs..
I'm trying to match a pattern (in this case "ProcessType")in a logfile, then delete that line and the 4 following lines.
The logfile looks as follows:
ProcessType: PROCESS_A... (5 Replies)
Hi,
I've got a file with 3 columns which ends like this:
...
1234 345 1400
5287 733 1400
8472 874 1400
9317 726 1400
I want to replace the last row of the last column with the value 0. So my new file will end:
...
1234 345 1400
5287 733 1400
8472 874 1400
9317 726 ... (5 Replies)
Hello ALL,
I have very huge file almost 25G size
contents of the file are "|" delimited columns on each row
eg:
1396745|1078529|KDS|2011-04-21 00:00:00.0|1100|30|2|2011-04-20 22:35:24.0|2011-04-20 22:35:24.0|0|2011-04-21 00:00:00.0|1100|2222434|2011-04-21 11:00:00.0|0|0|2011-06-29... (10 Replies)
Hello,
I want to add a new row to a file to insert data without deleting the previous data there.
Example:
file
a
b
c
d
Output
a
b
newtext
c (6 Replies)
Hi Everyone!
I have a problem my script. I'm useing sed to find the separate character in my text
sed 's/"*"//g' ./myfile.txt
My problem:
When the last row is doesn't has enter in the end of line, the sed is not work. So if i have a 30 rows text i will see 29 rows separators.
Please help... (9 Replies)
Discussion started by: snayper
9 Replies
LEARN ABOUT CENTOS
html::linkextor
HTML::LinkExtor(3) User Contributed Perl Documentation HTML::LinkExtor(3)NAME
HTML::LinkExtor - Extract links from an HTML document
SYNOPSIS
require HTML::LinkExtor;
$p = HTML::LinkExtor->new(&cb, "http://www.perl.org/");
sub cb {
my($tag, %links) = @_;
print "$tag @{[%links]}
";
}
$p->parse_file("index.html");
DESCRIPTION
HTML::LinkExtor is an HTML parser that extracts links from an HTML document. The HTML::LinkExtor is a subclass of HTML::Parser. This means
that the document should be given to the parser by calling the $p->parse() or $p->parse_file() methods.
$p = HTML::LinkExtor->new
$p = HTML::LinkExtor->new( $callback )
$p = HTML::LinkExtor->new( $callback, $base )
The constructor takes two optional arguments. The first is a reference to a callback routine. It will be called as links are found. If
a callback is not provided, then links are just accumulated internally and can be retrieved by calling the $p->links() method.
The $base argument is an optional base URL used to absolutize all URLs found. You need to have the URI module installed if you provide
$base.
The callback is called with the lowercase tag name as first argument, and then all link attributes as separate key/value pairs. All
non-link attributes are removed.
$p->links
Returns a list of all links found in the document. The returned values will be anonymous arrays with the following elements:
[$tag, $attr => $url1, $attr2 => $url2,...]
The $p->links method will also truncate the internal link list. This means that if the method is called twice without any parsing
between them the second call will return an empty list.
Also note that $p->links will always be empty if a callback routine was provided when the HTML::LinkExtor was created.
EXAMPLE
This is an example showing how you can extract links from a document received using LWP:
use LWP::UserAgent;
use HTML::LinkExtor;
use URI::URL;
$url = "http://www.perl.org/"; # for instance
$ua = LWP::UserAgent->new;
# Set up a callback that collect image links
my @imgs = ();
sub callback {
my($tag, %attr) = @_;
return if $tag ne 'img'; # we only look closer at <img ...>
push(@imgs, values %attr);
}
# Make the parser. Unfortunately, we don't know the base yet
# (it might be different from $url)
$p = HTML::LinkExtor->new(&callback);
# Request document and parse it as it arrives
$res = $ua->request(HTTP::Request->new(GET => $url),
sub {$p->parse($_[0])});
# Expand all image URLs to absolute ones
my $base = $res->base;
@imgs = map { $_ = url($_, $base)->abs; } @imgs;
# Print them out
print join("
", @imgs), "
";
SEE ALSO
HTML::Parser, HTML::Tagset, LWP, URI::URL
COPYRIGHT
Copyright 1996-2001 Gisle Aas.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.16.3 2013-03-25 HTML::LinkExtor(3)