Hi All,
I'm trying to test a Hash variable but it's not working. Here is my code - can anyone tell me if the test is valid?
for (keys %enabled_yn) {
if ($enabled_yn{$1} =~ m/\s+Y/) {
$html =~ s/%(\w+)%/\<b\>\<font color\=orange\>$enabled_yn{$1}\<\/font\>\<\/b\>/g;
}... (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)
#use perl 5.8.5;
my %h1=(a=>'b', c=>'d');
my %h2=(a1=>'b1', c1=>'d1');
my $R1=\%h1;
my $R2=\%h2;
my %h= {$R1, $R2};
my $href=\%h; # hash of hashes
foreach my $key (keys %$href){
print "Z::$$href{$key}\n"
}
When I am trying to print elements of hash of hashes,
it prints HASH... (1 Reply)
Hi Everyone,
Can anyone help me how do i call hash variable in to sql query in perl. Please see the script below
i have defined two Hash %lc and %tab as below
$lc{'REFF'}='V_RES_CLASS';
$lc{'CALE'}='V_CAP_CLASS';
$lc{'XRPD'}='V_XFMR_CLASS';
$tab{'V_RES_CLASS'}='V_MFR_SERS';... (6 Replies)
Guys,
May i know how can we de reference the code reference variable.?
my $a = sub{$a=shift;$b=shift;print "SUM:",($a+$b),"\n";};
print $a->(4,5);
How can we print the whole function ?
Please suggest me regarding this.
Thanks for your time :)
Cheers,
Ranga :) (0 Replies)
Hi,
Is it possible in perl to have a hash defined with variables as theirs key values, like:
%account = ('username' => 'boy', 'password' => $password);
Thanks (1 Reply)
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 Perl users,
Could somebody help me to find the solution of my problem below.
Here is my data:
__DATA__
===================================================
NameOfipaddress ippair_1
propertiesx y
propertiesy x... (1 Reply)
Dear Perl users/experts,
Could somebody help me how to solve my problem, I have a hash variable that I want to convert into dot file (graphviz).
I know how to convert it to dot file but I need some modification on the output of the hash variable before convert it to dot file.
Eeach key of... (1 Reply)
Discussion started by: askari
1 Replies
LEARN ABOUT OSX
padwalker5.16
PadWalker(3) User Contributed Perl Documentation PadWalker(3)NAME
PadWalker - play with other peoples' lexical variables
SYNOPSIS
use PadWalker qw(peek_my peek_our peek_sub closed_over);
...
DESCRIPTION
PadWalker is a module which allows you to inspect (and even change!) lexical variables in any subroutine which called you. It will only
show those variables which are in scope at the point of the call.
PadWalker is particularly useful for debugging. It's even used by Perl's built-in debugger. (It can also be used for evil, of course.)
I wouldn't recommend using PadWalker directly in production code, but it's your call. Some of the modules that use PadWalker internally are
certainly safe for and useful in production.
peek_my LEVEL
peek_our LEVEL
The LEVEL argument is interpreted just like the argument to "caller". So peek_my(0) returns a reference to a hash of all the "my"
variables that are currently in scope; peek_my(1) returns a reference to a hash of all the "my" variables that are in scope at the
point where the current sub was called, and so on.
"peek_our" works in the same way, except that it lists the "our" variables rather than the "my" variables.
The hash associates each variable name with a reference to its value. The variable names include the sigil, so the variable $x is
represented by the string '$x'.
For example:
my $x = 12;
my $h = peek_my (0);
${$h->{'$x'}}++;
print $x; # prints 13
Or a more complex example:
sub increment_my_x {
my $h = peek_my (1);
${$h->{'$x'}}++;
}
my $x=5;
increment_my_x;
print $x; # prints 6
peek_sub SUB
The "peek_sub" routine takes a coderef as its argument, and returns a hash of the "my" variables used in that sub. The values will
usually be undefined unless the sub is in use (i.e. in the call-chain) at the time. On the other hand:
my $x = "Hello!";
my $r = peek_sub(sub {$x})->{'$x'};
print "$$r
"; # prints 'Hello!'
If the sub defines several "my" variables with the same name, you'll get the last one. I don't know of any use for "peek_sub" that
isn't broken as a result of this, and it will probably be deprecated in a future version in favour of some alternative interface.
closed_over SUB
"closed_over" is similar to "peek_sub", except that it only lists the "my" variables which are used in the subroutine but defined
outside: in other words, the variables which it closes over. This does have reasonable uses: see Data::Dump::Streamer, for example (a
future version of which may in fact use "closed_over").
set_closed_over SUB, HASH_REF
"set_closed_over" reassigns the pad variables that are closed over by the subroutine.
The second argument is a hash of references, much like the one returned from "closed_over".
var_name LEVEL, VAR_REF
var_name SUB, VAR_REF
"var_name(sub, var_ref)" returns the name of the variable referred to by "var_ref", provided it is a "my" variable used in the sub. The
"sub" parameter can be either a CODE reference or a number. If it's a number, it's treated the same way as the argument to "peek_my".
For example,
my $foo;
print var_name(0, $foo); # prints '$foo'
sub my_name {
return var_name(1, shift);
}
print my_name($foo); # ditto
AUTHOR
Robin Houston <robin@cpan.org>
With contributions from Richard Soberberg, Jesse Luehrs and Yuval Kogman, bug-spotting from Peter Scott, Dave Mitchell and Goro Fuji, and
suggestions from demerphq.
SEE ALSO
Devel::LexAlias, Devel::Caller, Sub::Parameters
COPYRIGHT
Copyright (c) 2000-2009, Robin Houston. All Rights Reserved. This module is free software. It may be used, redistributed and/or modified
under the same terms as Perl itself.
perl v5.16.2 2012-08-24 PadWalker(3)