Experts - Any advice on how to get a hash value in a foreach loop?
Values print correctly on standalone print statements, but I can't access value
in foreach loop.
See sample code below and thanks in advance.
i've reworked some code from an earlier post, and it isn't working as expected
i've simplified it to try and find the problem. i spent hours trying to figure out what is wrong, eventually thinking there was a bug in perl or a problem with my computer. but, i've tried it on 3 machines with the... (5 Replies)
I have a script with dynamic hash of hashes , and I want to print the entire hash (with all other hashes).
Itried to do it recursively by checking if the current key is a hash and if yes call the current function again with refference to the sub hash.
Most of the printing seems to be OK but in... (1 Reply)
Hi,
I have thousands of files in a directory that have the following 2 formats:
289620178.aln
289620179.aln
289620180.aln
289620183.aln
289620184.aln
289620185.aln
289620186.aln
289620187.aln
289620188.aln
289620189.aln
289620190.aln
289620192.aln....
and:
alnCDS_1.fasta (1 Reply)
Hi,
The task i have to do is to
1- create a database contains the Names .run the query and store results in hash make the Name field is the hash key
2- in the same time i have a txt which i will loop through it word by word and check for each word if a hash key ( compare it with the Names in... (0 Replies)
I am modifying someone else's code. There is a foreach statement printing the contents of a hash.
Can someone give me an example of printing the last element in a hash?
The output currently is
A
B
C
D
E
I want the output to be
E (1 Reply)
Can Someone explain me why even using Tie::IxHash I can not get the output data in the same order that it was inserted? See code below.
#!/usr/bin/perl
use warnings;
use Tie::IxHash;
use strict;
tie (my %programs, "Tie::IxHash");
while (my $line = <DATA>) {
chomp $line;
my(... (1 Reply)
Hello All,
Im a Hardware engineer, I have written this script to automate my job. I got stuck in the following location.
CODE:
..
..
...
foreach $key(keys %arr_hash) {
my ($loc,$ind,$add) = split /,/, $arr_hash{$key};
&create_verilog($key, $loc, $ind ,$add);
}
sub create_verilog{... (2 Replies)
Hi,
In Perl, is it possible to use a range of numbers with '..' as a key in a hash?
Something in like:
%hash = (
'768..1536' => '1G',
'1537..2560' => '2G'
);
That is, the range operation is evaluated, and all members of the range are... (3 Replies)
Hi,
I have an hashes of hash, where hash is dynamic, it can be n number of hash. i need to compare data_count values of all .
my %result (
$abc => {
'data_count' => '10',
'ID' => 'ABC122',
}
$def => {
'data_count' => '20',
'ID' => 'defASe',
... (1 Reply)
Hi, I have a hash of hash where it has
name, activities and count
i have data like this -
$result->{$name}->{$activities} = $value;
content of that are -
name - robert tom cat peter
activities - running, eating, sleeping , drinking, work
i need to print output as below
... (3 Replies)
Discussion started by: asak
3 Replies
LEARN ABOUT MOJAVE
extutils::packlist5.18
ExtUtils::Packlist(3pm) Perl Programmers Reference Guide ExtUtils::Packlist(3pm)NAME
ExtUtils::Packlist - manage .packlist files
SYNOPSIS
use ExtUtils::Packlist;
my ($pl) = ExtUtils::Packlist->new('.packlist');
$pl->read('/an/old/.packlist');
my @missing_files = $pl->validate();
$pl->write('/a/new/.packlist');
$pl->{'/some/file/name'}++;
or
$pl->{'/some/other/file/name'} = { type => 'file',
from => '/some/file' };
DESCRIPTION
ExtUtils::Packlist provides a standard way to manage .packlist files. Functions are provided to read and write .packlist files. The
original .packlist format is a simple list of absolute pathnames, one per line. In addition, this package supports an extended format,
where as well as a filename each line may contain a list of attributes in the form of a space separated list of key=value pairs. This is
used by the installperl script to differentiate between files and links, for example.
USAGE
The hash reference returned by the new() function can be used to examine and modify the contents of the .packlist. Items may be
added/deleted from the .packlist by modifying the hash. If the value associated with a hash key is a scalar, the entry written to the
.packlist by any subsequent write() will be a simple filename. If the value is a hash, the entry written will be the filename followed by
the key=value pairs from the hash. Reading back the .packlist will recreate the original entries.
FUNCTIONS
new()
This takes an optional parameter, the name of a .packlist. If the file exists, it will be opened and the contents of the file will be
read. The new() method returns a reference to a hash. This hash holds an entry for each line in the .packlist. In the case of old-
style .packlists, the value associated with each key is undef. In the case of new-style .packlists, the value associated with each key
is a hash containing the key=value pairs following the filename in the .packlist.
read()
This takes an optional parameter, the name of the .packlist to be read. If no file is specified, the .packlist specified to new() will
be read. If the .packlist does not exist, Carp::croak will be called.
write()
This takes an optional parameter, the name of the .packlist to be written. If no file is specified, the .packlist specified to new()
will be overwritten.
validate()
This checks that every file listed in the .packlist actually exists. If an argument which evaluates to true is given, any missing
files will be removed from the internal hash. The return value is a list of the missing files, which will be empty if they all exist.
packlist_file()
This returns the name of the associated .packlist file
EXAMPLE
Here's "modrm", a little utility to cleanly remove an installed module.
#!/usr/local/bin/perl -w
use strict;
use IO::Dir;
use ExtUtils::Packlist;
use ExtUtils::Installed;
sub emptydir($) {
my ($dir) = @_;
my $dh = IO::Dir->new($dir) || return(0);
my @count = $dh->read();
$dh->close();
return(@count == 2 ? 1 : 0);
}
# Find all the installed packages
print("Finding all installed modules...
");
my $installed = ExtUtils::Installed->new();
foreach my $module (grep(!/^Perl$/, $installed->modules())) {
my $version = $installed->version($module) || "???";
print("Found module $module Version $version
");
print("Do you want to delete $module? [n] ");
my $r = <STDIN>; chomp($r);
if ($r && $r =~ /^y/i) {
# Remove all the files
foreach my $file (sort($installed->files($module))) {
print("rm $file
");
unlink($file);
}
my $pf = $installed->packlist($module)->packlist_file();
print("rm $pf
");
unlink($pf);
foreach my $dir (sort($installed->directory_tree($module))) {
if (emptydir($dir)) {
print("rmdir $dir
");
rmdir($dir);
}
}
}
}
AUTHOR
Alan Burlison <Alan.Burlison@uk.sun.com>
perl v5.18.2 2013-11-04 ExtUtils::Packlist(3pm)