09-07-2008
The sed & awk book is excellent for both. They are useful and stable tools which do not evolve much any more, but are still useful to have around. If you mean to be able to read and understand Unix shell scripts written by others, they are a must. Advanced sed scripting might not be all that useful to know if you are going to be learning awk and Perl anyway, but the basics (substitution, regex matching, maybe simple loops) are used a lot to make up for missing features in the shell.
PS I guess you know both books are available on-line for free?
http://books.google.com/books?hl=en&...result#PPP1,M1
http://www.gnu.org/software/gawk/manual/
Last edited by era; 09-07-2008 at 02:00 PM..
Reason: Links to online editions
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a question. Take the following statement
awk -F\| '{print $21}' testfile | sed 's/\//\\/g' > newfile
This will grab the 21st column of a | delimited text file, replace the forward slashes "/" , with back slashes "\", and redirect the output newfile. Now, how do I get the output... (4 Replies)
Discussion started by: shimb0
4 Replies
2. Shell Programming and Scripting
Hello,
I am new to shell scripting. I want to optimize my one of the script.
I have one file and i want to remove selected zones for domains from that file.In this file i have almost 3500 zones for domains.Sample data for the file....
named.backup... (0 Replies)
Discussion started by: nrbhole
0 Replies
3. Shell Programming and Scripting
How do I grab the first 10 characters of a line and append it to another empty file? (7 Replies)
Discussion started by: xgringo
7 Replies
4. UNIX for Dummies Questions & Answers
Hello,
Despite reading the Pattern Matching chapter in the O'Reilly Sed & Awk book several times and
looking at numerous examples, I cannot seem to get any kind of conditional script to work in my awk scripts!
I am able to do the basic awk and grep script to capture the data but when I do with... (0 Replies)
Discussion started by: pg55
0 Replies
5. Shell Programming and Scripting
Hi all,
can anyone have sed & awk programming doc..so that to learn it easier.. (1 Reply)
Discussion started by: gk2009
1 Replies
6. Shell Programming and Scripting
I have large number of data files, close to 300 files, lets say all files are same kind and have extension .dat , each file have mulitple lines in it.
There is a unique line in each file containing string 'SERVER'. Right after this line there is another line which contain a string 'DIGIT=0',... (4 Replies)
Discussion started by: sal_tx
4 Replies
7. UNIX for Dummies Questions & Answers
Hi,
Can anyone let me know the difference between awk and sed utilities in Unix?
Many thanks. (2 Replies)
Discussion started by: venkatesht
2 Replies
8. Shell Programming and Scripting
Hello,
I have a file. its content are like below.
mdn:87439842
imsi:23082038203
Ctime:12082010 01:20:10
mdn:9324783783
imsi:402349823322
Ctime: 12072010 01:20:10
mdn:87439842
imsi:23082038203
Ctime: 23072010 01:20:10
mdn:87439842
imsi:23082038203
Ctime:18072010 01:20:10
mdn:87439842... (3 Replies)
Discussion started by: Sanket11
3 Replies
9. Shell Programming and Scripting
Hi Experts,
I am studying SED and AWK text processing commands with an E-book. I am not satisfied with the way of explanation and examples given by them.
I would like you guys to suggest me the Best book for SED and AWK to become good in this utility.
Thanks in Advance (1 Reply)
Discussion started by: linuxrulez
1 Replies
10. Shell Programming and Scripting
string="din&esh\nisgood"
File.txt:
the name is
sed "s#\#${string}#g" File.txt
Output am getting:
the name is dinesh
is good
Expected output:
the name is din&esh\nisgood
The input string is dynamic it will be keep on changing
am able to handle & by placing \& in the string.. (5 Replies)
Discussion started by: dineshaila
5 Replies
LEARN ABOUT PHP
domdocument.getelementbyid
DOMDOCUMENT.GETELEMENTBYID(3) 1 DOMDOCUMENT.GETELEMENTBYID(3)
DOMDocument::getElementById - Searches for an element with a certain id
SYNOPSIS
public DOMElement DOMDocument::getElementById (string $elementId)
DESCRIPTION
This function is similar to "DOMDocument::getElementsByTagName" but searches for an element with a given id.
For this function to work, you will need either to set some ID attributes with "DOMElement::setIdAttribute" or a DTD which defines an
attribute to be of type ID. In the later case, you will need to validate your document with "DOMDocument::validate" or DOMDocument::$vali-
dateOnParse before using this function.
PARAMETERS
o $elementId
- The unique id value for an element.
RETURN VALUES
Returns the DOMElement or NULL if the element is not found.
EXAMPLES
Example #1
DOMDocument::getElementById() Example
The following examples use book.xml which contains the following:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE books [
<!ELEMENT books (book+)>
<!ELEMENT book (title, author+, xhtml:blurb?)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT blurb (#PCDATA)>
<!ELEMENT author (#PCDATA)>
<!ATTLIST books xmlns CDATA #IMPLIED>
<!ATTLIST books xmlns:xhtml CDATA #IMPLIED>
<!ATTLIST book id ID #IMPLIED>
<!ATTLIST author email CDATA #IMPLIED>
]>
<?xml-stylesheet type="text/xsl" href="style.xsl"?>
<books xmlns="http://books.php/" xmlns:xhtml="http://www.w3.org/1999/xhtml">
<book id="php-basics">
<title>PHP Basics</title>
<author email="jim.smith@basics.php">Jim Smith</author>
<author email="jane.smith@basics.php">Jane Smith</author>
<xhtml:blurb><![CDATA[
<p><em>PHP Basics</em> provides an introduction to PHP.</p>
]]></xhtml:blurb>
</book>
<book id="php-advanced">
<title>PHP Advanced Programming</title>
<author email="jon.doe@advanced.php">Jon Doe</author>
</book>
</books>
<?php
$doc = new DomDocument;
// We need to validate our document before refering to the id
$doc->validateOnParse = true;
$doc->Load('book.xml');
echo "The element whose id is 'php-basics' is: " . $doc->getElementById('php-basics')->tagName . "
";
?>
The above example will output:
The element whose id is 'php-basics' is: book
SEE ALSO
DOMDocument::getElementsByTagName.
PHP Documentation Group DOMDOCUMENT.GETELEMENTBYID(3)