Re: System vs. User module version of List::Util

G'day Lady Aleena,

What you have installed locally ("from the command line") indicates Perl 5.24.1; however, whatever your ISP, or equivalent, has installed ("from the browser") indicates Perl 5.8.8.

As far as I know, the core List::Util module has never had the uniq function. Here's the online perldoc for the nearest versions I could find: List::Util (Perl 5.8.8 core) and List::Util (Perl 5.24.0 core) — note the absence of the uniq function in both of those.

When you install List::Util from CPAN, you're actually getting a bundle of modules. At the top of List::Util (CPAN) you'll see the link to the Scalar-List-Utils-1.47 distribution. Follow that to see the modules and other files; one of those is README which contains:

This distribution is a replacement for the builtin distribution.

This package contains a selection of subroutines that people have expressed would be nice to have in the perl core, but the usage would not really be high enough to warrant the use of a keyword, and the size so small such that being individual extensions would be wasteful.

The module which originally had (as best as I remember) the uniq function is List::MoreUtils. Rather than trying to manipulate @INC, you might be better off changing

use List::Util qw{uniq};
[download]

use List::MoreUtils qw{uniq};
[download]

Of course, that would require your ISP (or equivalent) to have List::MoreUtils installed.

"So I installed it in my user directory, and it is version 1.47. However, I am getting an error that uniq is not exported by List::Util."

It's possible I've missed the point there somewhere; in case I haven't, I'll just point out that modules added to the 5.24.1 installation will not make them available to the 5.8.8 installation.

— Ken

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Re^2: System vs. User module version of List::Util by Lady_Aleena (Priest) on Jun 18, 2017 at 06:15 UTC
When I said "from the command line", I sshed into my account, and read the perldoc there. I was not talking about from my system's command line. And darn it! My local List::Util has `uniq`. And this is just great, for my stuff for the browser, I am stuck with 5.8.8; but on the command line of my web host, I have 5.24.2. That's so not fair! (And not a PM problem.) And yes, my web host has List::MoreUtils installed, and I used it instead. Thanks! *No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!* Lady Aleena	[reply] [d/l]
Re^3: System vs. User module version of List::Util by dsheroh (Monsignor) on Jun 18, 2017 at 08:40 UTC
And this is just great, for my stuff for the browser, I am stuck with 5.8.8; but on the command line of my web host, I have 5.24.2. That's so not fair! (And not a PM problem.) This is actually something that you can probably fix. On the command line, run `which perl` to get the path to the `perl` binary that you're using there. Now modify the shebang line at the top of your web script to match (e.g., if `which perl` says `/home/aleena/perlbin/perl`, then, in your web script, change `#!/usr/bin/perl` to `#!/home/aleena/perlbin/perl`) and your web script should now run in the same version of Perl as you get on the command line, and with the same compile-time settings, including the default value of `@INC`.	[reply] [d/l] [select]
Re^4: System vs. User module version of List::Util by Lady_Aleena (Priest) on Jun 18, 2017 at 09:09 UTC
Modifying the shebang won't work, since I do not have the same set up as my webhost. So a custom shebang for my webhost would make my scripts (286 of them) fail locally. That is why I have to code for 5.8.8 (web) even though I have 5.22.2 locally and my web host have 5.24.2 at the command line. I am so screwed up. *No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!* Lady Aleena	[reply]
Re^5: System vs. User module version of List::Util by karlgoethebier (Abbot) on Jun 19, 2017 at 07:39 UTC
Re^6: System vs. User module version of List::Util by afoken (Chancellor) on Jun 19, 2017 at 08:34 UTC
Re^4: System vs. User module version of List::Util by Lady_Aleena (Priest) on Jun 20, 2017 at 11:12 UTC
Addendum: `which perl` returns `/usr/local/cpanel/3rdparty/bin/perl`. I don't have cpanel on my computer, so again, changing the shebang to match that would still make my local copies fail, I think. *No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!* Lady Aleena	[reply] [d/l] [select]
Re^5: System vs. User module version of List::Util by Anonymous Monk on Jun 21, 2017 at 06:58 UTC
Re^3: System vs. User module version of List::Util by karlgoethebier (Abbot) on Jun 18, 2017 at 08:28 UTC
BTW, you use Debian, right? You should consider to use Perlbrew. Regards, Karl �The Crux of the Biscuit is the Apostrophe� Furthermore I consider that Donald Trump must be impeached as soon as possible	[reply]
Re^4: System vs. User module version of List::Util by Lady_Aleena (Priest) on Jun 18, 2017 at 09:12 UTC
I just went to the link. I don't see what Perlbrew can do for me. I only have 1 version of perl on my PC. I already install cpan modules without ~~cpan~~ sudo (into my $HOME directory). So what else can it do that isn't obvious? *No matter how hysterical I get, my problems are not time sensitive. So, relax, have a cookie, and a very nice day!* Lady Aleena	[reply]
Re^5: System vs. User module version of List::Util by karlgoethebier (Abbot) on Jun 18, 2017 at 09:28 UTC
Re^5: System vs. User module version of List::Util by ikegami (Patriarch) on Jun 20, 2017 at 01:41 UTC
Re^4: System vs. User module version of List::Util by karlgoethebier (Abbot) on Jun 20, 2017 at 15:20 UTC
Some meditative retreats might be helpful now. Best regards, Karl �The Crux of the Biscuit is the Apostrophe� Furthermore I consider that Donald Trump must be impeached as soon as possible	[reply]