hey guys, how do i replace only a line within a file without messing up the rest of the contents of the file?
see, if possible can you guys give me a straight forward way to do this. i dont want a complex command. what i mean is i know i can accomplish this by using sed, well, i think i can,... (3 Replies)
Hi there
I have a file which has the lines
# Serial number for hostid
EXP_SERIAL_=""
These lines could be anywhere in the file as far as line numbers go, I would like replace these two lines with
# Serial number for hostid $var1
EXP_SERIAL_$var1="$var2"
Is there a quick and simple... (6 Replies)
Hi All,
I have a query on Perl. I have a text file which has 3 lines, i want to only replace the first line with my replaced text and keep the rest of the text. FOr eg
Before change -->
echo:a:pending
echo:b:pending
echo:c:pending
After change --->
echo:a:done
echo:b:pending... (1 Reply)
Dear All,
Regards of the Day.
I have a text file with some functions:
Function1
{
parameter 1
parameter 2
parameter 3
}
end
Function2
{
parameter 1
parameter 2
parameter 3
} (1 Reply)
Hi
Am confused with the usage of "sed" command
I want to replace a single line with multiple lines of a file..
eg.,
A file has
Hi, How are you?
I need to replace as
Am fine
What are You doing?
I used the script as
string1="Hi, How are you?"
echo "$string1 is the value"... (4 Replies)
Greetings all
I have a delimited text file (the delimiter is ';') where certain fields consist of many blanks e.g. ; ; and ; ;
Before I separate the data I need to eliminate these blanks altogether.
I tried the sed command using the following syntax:
sed -i 's/; *;/;;/g' <filename>
... (15 Replies)
Here is the task that I was presented with:
I am dealing with about a 10,000 line input deck file for an analysis. About 10 separate blocks of around 25 lines of code each need to be updated in the input deck.
The input deck (deckToChange in the code below) comes with 2 separate files. File 1... (5 Replies)
GM,
I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed.
I am assuming that sed, awk or even perl could do what I need.
I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Please help me in this scenario
i have two text files as below
file1.txt
record_1
conversion of a file;
code change;
data types;
lenght;
end;
record_2
field name;
string;
new fileline;
end;
record_3 (7 Replies)
Discussion started by: velraj9
7 Replies
LEARN ABOUT DEBIAN
xml::treebuilder
XML::TreeBuilder(3pm) User Contributed Perl Documentation XML::TreeBuilder(3pm)NAME
XML::TreeBuilder - Parser that builds a tree of XML::Element objects
SYNOPSIS
foreach my $file_name (@ARGV) {
my $tree = XML::TreeBuilder->new({ 'NoExpand' => 0, 'ErrorContext' => 0 }); # empty tree
$tree->parse_file($file_name);
print "Hey, here's a dump of the parse tree of $file_name:
";
$tree->dump; # a method we inherit from XML::Element
print "And here it is, bizarrely rerendered as XML:
",
$tree->as_XML, "
";
# Now that we're done with it, we must destroy it.
$tree = $tree->delete;
}
DESCRIPTION
This module uses XML::Parser to make XML document trees constructed of XML::Element objects (and XML::Element is a subclass of
HTML::Element adapted for XML). XML::TreeBuilder is meant particularly for people who are used to the HTML::TreeBuilder / HTML::Element
interface to document trees, and who don't want to learn some other document interface like XML::Twig or XML::DOM.
The way to use this class is to:
1. start a new (empty) XML::TreeBuilder object.
2. set any of the "store" options you want.
3. then parse the document from a source by calling "$x->parsefile(...)" or "$x->parse(...)" (See XML::Parser docs for the options that
these two methods take)
4. do whatever you need to do with the syntax tree, presumably involving traversing it looking for some bit of information in it,
5. and finally, when you're done with the tree, call $tree->delete to erase the contents of the tree from memory. This kind of thing
usually isn't necessary with most Perl objects, but it's necessary for TreeBuilder objects. See HTML::Element for a more verbose
explanation of why this is the case.
METHODS AND ATTRIBUTES
XML::TreeBuilder is a subclass of XML::Element, which in turn is a subclass of HTML:Element. You should read and understand the
documentation for those two modules.
An XML::TreeBuilder object is just a special XML::Element object that allows you to call these additional methods:
$root = XML::TreeBuilder->new()
Construct a new XML::TreeBuilder object.
Parameters:
NoExpand
Passed to XML::Parser. Do not Expand external entities.
Default: undef
ErrorContext
Passed to XML::Parser. Number of context lines to generate on errors.
Default: undef
$root->eof
Deletes parser object.
$root->parse(...options...)
Uses XML::Parser's "parse" method to parse XML from the source(s?) specified by the options. See XML::Parse
$root->parsefile(...options...)
Uses XML::Parser's "parsefile" method to parse XML from the source(s?) specified by the options. See XML::Parse
$root->parse_file(...options...)
Simply an alias for "parsefile".
$root->store_comments(value)
This determines whether TreeBuilder will normally store comments found while parsing content into $root. Currently, this is off by
default.
$root->store_declarations(value)
This determines whether TreeBuilder will normally store markup declarations found while parsing content into $root. Currently, this is
off by default.
$root->store_pis(value)
This determines whether TreeBuilder will normally store processing instructions found while parsing content into $root. Currently,
this is off (false) by default.
SEE ALSO
XML::Parser, XML::Element, HTML::TreeBuilder, HTML::DOMbo.
And for alternate XML document interfaces, XML::DOM and XML::Twig.
COPYRIGHT AND DISCLAIMERS
Copyright (c) 2000,2004 Sean M. Burke. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
AUTHOR
Sean M. Burke, <sburke@cpan.org>
perl v5.10.1 2011-03-05 XML::TreeBuilder(3pm)