06-28-2007
another perl question
I copy and paste from the book but this thing is not working.
I cannot figure out what is wrong with myline 9.. can someone please tell me
[root@localhost perl]# cat ./sort4.pl
#!/usr/bin/perl -w
use strict;
use warnings;
my $input = shift;
my $output = shift;
open(IN, '<', $input) or die "Can't read source file $input: $!\n";
open(OUT, '>', $output) or die "CAn't write to file $output: $!\n";
my @file = <IN>;
@file = sort @file;
print OUT @file;
close IN;
close OUT;
[root@localhost perl]# perl -c sort4.pl
sort4.pl syntax OK
[root@localhost perl]# perl sort4.pl
Use of uninitialized value in open at sort4.pl line 9.
Use of uninitialized value in concatenation (.) or string at sort4.pl line 9.
Can't read source file : No such file or directory
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Where can i find solid information about programming in Perl?
Thank you in advance!!!:) (5 Replies)
Discussion started by: SolidSnake
5 Replies
2. Shell Programming and Scripting
When i run my perl/tk script, a perl window pops up behind the GUI window,, can this be hidden????
Also, can the Icon be changed, the Tk icon in every window??? (1 Reply)
Discussion started by: perleo
1 Replies
3. Shell Programming and Scripting
If I use 2 system commands in a script, will one finish before the next one starts? or will it start the first and the second at the same time?
i.e.
system("ps | grep rminer");
system("ls -al | grep 431"); (1 Reply)
Discussion started by: BG_JrAdmin
1 Replies
4. Shell Programming and Scripting
Hello,
pkzipc of a certain zip file yeilds the following in shell
PKZIP(R) Version 6.0 FAST! Compression Utility for AIX
Copyright 1989-2002 PKWARE Inc. All Rights Reserved. Registered Version
PKZIP Reg. U.S. Pat. and Tm. Off. Patent No. 5,051,745
Viewing .ZIP: test.zip
Length... (13 Replies)
Discussion started by: jerardfjay
13 Replies
5. Shell Programming and Scripting
Below program, I do not get why item I am looking for is , instead of .
When I do $#text, i get the right value for $value1, but when I do , i get somsething4, instead of
somsethingxxxxxxxxxxxxxxxxxxx(which is what I am looking for.
when I do , I get empty.. why? what did I do wrong? can you... (2 Replies)
Discussion started by: hankooknara
2 Replies
6. Shell Programming and Scripting
I fail to see how below answer is 1? can someone explain this for me?
DB<3> $string = "The cat sat on the mat";
DB<4> $animal = ($string =~ m/The (.*) sat/);
DB<5> print $animal;
1 (2 Replies)
Discussion started by: hankooknara
2 Replies
7. Shell Programming and Scripting
I have a question regarding bulding a hash from a file which has below pattern
I thought I could write something like this but clearly my syntax is way off
$/ = "\n\n";
$" = "\n";
open(FILE, file1) || die;
my %keymaster = ( );
while (<FILE>) {
my $topinfo =~... (5 Replies)
Discussion started by: hankooknara
5 Replies
8. Shell Programming and Scripting
I am reading a file in perl script .. during the debug the $linein value is :
linein : +ASM1,sys,||¬ |3Æqúoü;”ט||
from this line I am getting the tmepuser and password from above :
($tmpuser, $pwd) = ($linein =~ /^$server\s*,\s*(+)\s*,\|\|(.+)\|\|/sm);
I am getting $tmpuser and... (2 Replies)
Discussion started by: talashil
2 Replies
9. Shell Programming and Scripting
Hello all,
I have the following line:
xxx|xxxx|xxxx|xxx.xx|xxx
And i insert the values in an array. I am trying to find out if the field of the array (where field=xxx.xx) has the '.' character.
I am using the code below but it doesn't seem to work.
if($field=~ /./)
{
... (3 Replies)
Discussion started by: chriss_58
3 Replies
10. Shell Programming and Scripting
Hello everybody, I am new at the forum and a total newbie when it comes to Unix.
I am trying to see how I can add the ability to kill a user's processes?
I want to add this to my Shel Script Add the code/process into a subroutine.
Also, I would like to use an array to store the list... (0 Replies)
Discussion started by: kinelisch
0 Replies
LEARN ABOUT MOJAVE
xml::xpath::nodeset
XPath::NodeSet(3) User Contributed Perl Documentation XPath::NodeSet(3)
NAME
XML::XPath::NodeSet - a list of XML document nodes
DESCRIPTION
An XML::XPath::NodeSet object contains an ordered list of nodes. The nodes each take the same format as described in XML::XPath::XMLParser.
SYNOPSIS
my $results = $xp->find('//someelement');
if (!$results->isa('XML::XPath::NodeSet')) {
print "Found $results
";
exit;
}
foreach my $context ($results->get_nodelist) {
my $newresults = $xp->find('./other/element', $context);
...
}
API
new()
You will almost never have to create a new NodeSet object, as it is all done for you by XPath.
get_nodelist()
Returns a list of nodes. See XML::XPath::XMLParser for the format of the nodes.
string_value()
Returns the string-value of the first node in the list. See the XPath specification for what "string-value" means.
to_literal()
Returns the concatenation of all the string-values of all the nodes in the list.
get_node($pos)
Returns the node at $pos. The node position in XPath is based at 1, not 0.
size()
Returns the number of nodes in the NodeSet.
pop()
Equivalent to perl's pop function.
push(@nodes)
Equivalent to perl's push function.
append($nodeset)
Given a nodeset, appends the list of nodes in $nodeset to the end of the current list.
shift()
Equivalent to perl's shift function.
unshift(@nodes)
Equivalent to perl's unshift function.
prepend($nodeset)
Given a nodeset, prepends the list of nodes in $nodeset to the front of the current list.
perl v5.18.2 2002-09-02 XPath::NodeSet(3)