i am sorry as this is probably very simply but i am slowly learning perl and need to convert some old korn shell scripts.
I need to be able to search a file line by line but only match a string at particular location on that line, for example character 20-30. So my file could look something like this:
i want to be able to search this file for string "orange" but i only want to search for this string at particular position, say from character 7-13. I am used to in bash i can use |awk '{print $2)' to get my second field ..but how would i do it in perl using regular expressions ?
I am writing script that will act like the 'comm' utility. My
problem is when trying to read whether the user has entered -123 or -1
or -1...etc.
I currently have:
if(m/??/g){
print "Good.\n";
}
So, this should check for all... (1 Reply)
Hello,
$line=USING (FILE '/TEST1/FILENAME'5000)
I want to reterive the value between ' and ) which is 5000 here.
i have tried out the following expressions ...
Type 1 : $Var1=`sed -e 's/.*\' //' -e 's\).*$/' $line`;
Type 2 : $Var1=`echo $line | awk -F"\'" '{print $2}' | awk -F"\\)"... (1 Reply)
Hello,
$line=USING (FILE '/TEST1/FILENAME'5000)
I want to reterive the value between ' and ) which is 5000 here.
i have tried out the following expressions ...
Type 1 : $Var1=`sed -e 's/.*\' //' -e 's\).*$/' $line`;
Type 2 : $Var1=`echo $line | awk -F"\'" '{print $2}' | awk -F"\\)"... (3 Replies)
Hello
I have this regular expression:
</book>(?:\n)<collection>(.*)</collectioninfo>
And I have this peace of text on a FILE
<book bookid="3" title="the title 3" remaining = "50" price="100">
<reader readerid="1"><!]></reader>
<reader readerid="2"><!]></reader>
<reader... (1 Reply)
Hello everybody,
I am trying to connect from hp-ux to win 2003 using perl's Net::Telnet module. Seeing the examples in couple of web sites, I saw I have to declare a Prompt =>
Can somebody please tell me what my regular expression should be? The prompt after I log in is:
...
login:... (1 Reply)
i have a set of regular expressions. The words in the regular expression should be used to replace the i/p with hyphens '---'. i need perl script to evaluate these regular expression. the words in the regexes when found in the i/p file should be replaced with hyphens '---'.
the set of regular... (3 Replies)
Take a look at this code:
#!/usr/bin/perl
use 5.008;
$_ = "somename@address.com";
if(/\@\w+\.com/)
{
print "\n\nmight be an email address\n\n";
}
else
{
print "\n\nnot an email address\n\n";
}
Shouldn't the /\@\w+\.com/ evaluate as true? I've also tried:
... (3 Replies)
Hello all,
i am in a bit of dilema here. i dont know any thing about perl or python. only know a little bit of awk. now unable to take a decission as to which language to go for. my requirement is building a testing framework.suite which will execute ssytem comands remotely on unix... (2 Replies)
Hi Team,
I have two strings like:
xxx|yyy|Arizona Cardinals| Tell Cardinals | Cardinals
bbb|Bell Earn, Jr | Bell Earn | Jayhawks | hawks
I have a lookup file which has a set of strings. These need to be removed from above two strings
Lookup file Contents:
Bell Earn, Jr
hawks... (2 Replies)
im trying to extract some tags between and in a file..for eg..the file format is
I want the and extracted from the file i.e the tags which is present b/w and
I have the regex for extracting the tags from the whole file but how to specify my search within the and... (1 Reply)
Discussion started by: rajkrishna89
1 Replies
LEARN ABOUT CENTOS
yaml::node
YAML::Node(3) User Contributed Perl Documentation YAML::Node(3)NAME
YAML::Node - A generic data node that encapsulates YAML information
SYNOPSIS
use YAML;
use YAML::Node;
my $ynode = YAML::Node->new({}, 'ingerson.com/fruit');
%$ynode = qw(orange orange apple red grape green);
print Dump $ynode;
yields:
--- !ingerson.com/fruit
orange: orange
apple: red
grape: green
DESCRIPTION
A generic node in YAML is similar to a plain hash, array, or scalar node in Perl except that it must also keep track of its type. The type
is a URI called the YAML type tag.
YAML::Node is a class for generating and manipulating these containers. A YAML node (or ynode) is a tied hash, array or scalar. In most
ways it behaves just like the plain thing. But you can assign and retrieve and YAML type tag URI to it. For the hash flavor, you can also
assign the order that the keys will be retrieved in. By default a ynode will offer its keys in the same order that they were assigned.
YAML::Node has a class method call new() that will return a ynode. You pass it a regular node and an optional type tag. After that you can
use it like a normal Perl node, but when you YAML::Dump it, the magical properties will be honored.
This is how you can control the sort order of hash keys during a YAML serialization. By default, YAML sorts keys alphabetically. But notice
in the above example that the keys were Dumped in the same order they were assigned.
YAML::Node exports a function called ynode(). This function returns the tied object so that you can call special methods on it like
->keys().
keys() works like this:
use YAML;
use YAML::Node;
%$node = qw(orange orange apple red grape green);
$ynode = YAML::Node->new($node);
ynode($ynode)->keys(['grape', 'apple']);
print Dump $ynode;
produces:
---
grape: green
apple: red
It tells the ynode which keys and what order to use.
ynodes will play a very important role in how programs use YAML. They are the foundation of how a Perl class can marshall the Loading and
Dumping of its objects.
The upcoming versions of YAML.pm will have much more information on this.
AUTHOR
Ingy doet Net <ingy@cpan.org>
COPYRIGHT
Copyright (c) 2006, 2011-2012. Ingy doet Net. All rights reserved.
Copyright (c) 2002. Brian Ingerson. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See <http://www.perl.com/perl/misc/Artistic.html>
POD ERRORS
Hey! The above document had some coding errors, which are explained below:
Around line 296:
Non-ASCII character seen before =encoding in 'doet'. Assuming UTF-8
perl v5.16.3 2012-07-13 YAML::Node(3)