PERL Programming

TMTOWTDI || paradox of choice || paradox of TAFTMWTDI (there are far too many ways to do it)

Perl 6

Perl user communities

Perl Distributions

Perl cmdline switches

Perl cmdline handling || ARGV

CPAN Notes

Then when you are inside the shell type:


This will automatically download, unpack, and install the app.  It will also grab any deps. that are needed when installing!  Very nice indeed. :)
For more information about it, search for: CPAN on the CPAN search.

Here's a single liner to install a module from the CLI.

Also, if you for some reason need to reconfigure your CPAN options:


useful.things » Blog Archive » Perl CPAN reconfiguration - o conf init

you might as well follow prerequisites and permanently install things, don't u think?
 
CPAN automatically install all of the dependencies without prompting

o conf prerequisites_policy follow
o conf build_requires_install_policy yes
o conf commit



and if all else fails; throw away the prior config.

cd && mv .cpan .cpan-bak
upgrade all installed cpan modules
get yourself a drink, it might be a while. ppl are shipping code,doing work while you sleep.
you can try running cpan -u and/or doing a upgrade on everything. 




Life with CPAN

App::cpanminus - search.cpan.org - App::cpanminus - get, unpack, build and install modules from CPAN

CPAN dependencies and test results checker - using META.yml and META.json to work out deps, looking up modules, their deps and test results.  Reverse lookup of modules using a dep is also possible.



Some really great PERL tutorials live here:

Perl Maven's - Perl tutorial - Gabor Szabo

Alex Batko :: Programming :: Perl

Sam Graham's website > Perlblog

Introduction to References

Arrays vs. Lists in Perl: What's the Difference? - in scalar context

How do I print a hash that has a hash within it?

Alister West - Perl ++Code Alister West - Web Dev Pipeline



CPAN wrong directory
I have had issues in the past when uninstalling and installing perl on machines with cpan using the wrong directory.  If you find yourself with the same issue, try checking for a MyConfig.pm in your local directory.  In windows, I found it in "Local Settings\Application Data\.cpan\CPAN\MyConfig.pm"



CPAN self hosting / DarkPAN / local CPAN module repo
Perl Node Interface: Install your own Perl with your own CPAN
 - install CPAN::Mini,CPAN::Mini::Inject,CPAN::Mirror::Server::HTTP,CPAN::Mini::Webserver, minicpan,cpanmirrorhttpd --root $CPAN_ROOT

Pinto - search.cpan.org

melezhik/jam smart pinto glue, a tool which enables automatic creation of perl applications distribution archives from source code using pinto. CLI and web api.





CPANci || continuous integration for CPAN


 
  CPANci: Continuous Integration for CPAN  from Mike Friedman 






Nice way to start your perl file
#!/usr/bin/perl -Tw         # force taint checks, and print warnings
use strict;                 # install all three strictures
use warnings;               # print warnings
$|++;                       # force auto flush of output buffer




perl one liners
The top 10 tricks of Perl one-liners (Ksplice Blog)

dos2unix/unix2dos in perl
perl -pi -e 's/\r\n/\n/;' *.ext #dos2unix
perl -pi -e 's/\n/\r\n/;' *.ext #unix2dos





teideal glic deisbhéalach » Blog Archive » Peruse popular Perl packages





Perl version 5.10.0 documentation - perldoc.perl.org - where to go for docs on perl.

Examples in Perl

Data::Dumper::Concise - search.cpan.org

Data::Printer - colored pretty-print of Perl data structures and objects - metacpan.org - Perl programming language - colored output, better than Data::Dumper.




create a hash from comma delimited list of name value pairs.
my %set_hash = map { split /=/ } split /,/, $setlist;





should PERL be considered a functional language?
Yes, Perl should be considered a functional language.

Higher-Order Perl - Higher-Order Perl is about functional programming techniques in Perl. It's about how to write functions that can modify and manufacture other functions.

Derivative Function as a Closure in Perl - Derivative Function From Calculus as a Closure in Perl





Perl and C++ || Perl and XS || Perl and C
Don't forget SWIG.

XS is a specialized templating language for C. -- friedo

Perl and C++ - Perl XS (the Perl native glue) and C++

XS Mechanics XS Mechanics - Introduction XS Mechanics - Architecture

Mike Friedman (?friedo?) - The Perl API for the Mortally Terrified - YouTube The Perl API for the Mortally Terrified(slides)

Inline::C - search.cpan.org

Leont/libperl-- - LibPerl++ is a C++ library that provides a more friendly interface for the the perl API. It makes use of advanced features of C++ to make both embedding and extending perl as easy as possible. This repository also contains to helper libraries that may be split out at a later stage: libtap++ and Library::Build.

ExtUtils::XSpp - metacpan.org - XS++ is just a thin layer over plain XS, hence to use it you are supposed to know, at the very least, C++ and XS.

How to get started writing Perl bindings for a C++ library? - Stack Overflow







PERL IDE in Eclipse
EPIC - Eclipse Perl Integration - EPIC is an open source Perl IDE (including editor and debugger) based on the Eclipse platform, compatible with Windows, Linux and Mac OS X. (http://e-p-i-c.sf.net/updates/testing)





PERL for file renaming
Recipe 9.9. Renaming Files

How to Bulk Rename Files in Linux (Terminal or GUI) | Webmaster Tips







array returned as undef
This made me take a double take.  Try out the following:

my @array = undef;

if(@array) {
 print "defined\n";
} else { 
 print "undefined\n";
}

You will find that you get a defined value back!  So when you return an array, returning undef does not make the returning @array undef.  Instead, use the empty array ().




subroutine arguments with default values (@_)
sub bar{
    my %args = (
        # Set your defaults/doc your accepted args here
        aNiceandLongName => 'default'
        @_ # Passed-in args replace your defaults
    );
}
bar( aNiceandLongName => 'woodchuck');

Perl named, self-documenting subroutine arguments with default values



Logging in perl
8 Useful Log::Log4perl Recipes

Log::Log4perl::FAQ - Frequently Asked Questions on Log::Log4perl

Smart Logging With Log4per (PPT) or google quickview - really great set of slides.

Debugging Perl DBI - gives quite a good intro on DBIx::log4perl.

MooseX::Log::Log4perl - search.cpan.org





Email in perl
Sending Email with Perl Best Practice - I'll agree using MIME::Lite::TT::HTML is pretty awesome.





Random CPAN modules
Padre, the Perl IDE - install Padre::Perl, uses wxWidgets, as such it is Scintilla and SciTE based.

http_this - export the current directory over HTTP - metacpan.org

FindBin - perldoc.perl.org - module figures out where the script was invoked.  useful for relative paths...

IO-All README - metacpan.org

The home of asterisk-perl - A PERL module for Asterisk:

local::lib - search.cpan.org -  - create and use a local lib/ for perl modules with PERL5LIB

App::local::lib::helper::rationale - search.cpan.org

Perlbrew - perlbrew is a admin-free perl installation management tool. Manage perl installations in your $HOME.

App::FatPacker - pack your dependencies onto your script file - metacpan.org -Perl Advent Calendar 2012 - Self-contained applications





Plack || PSGI
# from PSGI.pod
my $app = sub {
      my $env = shift;
      return [
          '200',
          [ 'Content-Type' => 'text/plain' ],
          [ "Hello World" ], # or IO::Handle-like object
      ];
  };

perl code ref, accepts hash returns array ['statuscode',[content-type:hash],[handle or content]]

PSGI/Plack - Perl Superglue for Web Frameworks and Web Servers

Catalyst Advent Calendar - Day 23 - Plack - A Fantastic Layer To Make Your App Deployment Easier

PSGI - metacpan.org - Perl programming language - PSGI - Perl Web Server Gateway Interface Specification

Plack Advent Calendar





Perl Web Frameworks
Meteor - perl web 2.0 http server

Web-Simple - A quick and easy way to build simple web applications - metacpan.org

jjn1056/Shutterstock-Guestbook-Web - GitHub - example web application using Web::Simple, Moo and HTML::Zoom.

mfontani/Brocco · GitHub - Blog engine written in Perl using Dancer DBIx::Class Text::MultiMarkdown DBIx::Class::Schema::Loader

HTML-Zoom - selector based streaming template engine - HTML::Zoom is the cure for JQuery envy.





Dancer
Dancer - Perl Web Framework for easy and fun webapp development

Dancer::Cookbook - a quick-start guide to the Dancer web framework - metacpan.org - Perl programming language

Dancer::Deployment - common ways to put your Dancer app into use - metacpan.org - Perl programming language

Dancer::Plugin::Database - easy database connections for Dancer applications - metacpan.org - Perl programming language

berekuk/questhub - Questhub.io








Catalyst
Catalyst | Perl MVC web application framework - PERL MVC install Task::Catalyst

Catalyst::Wiki

yanick/Galuga - GitHub - Galuga - Yet another blog engine (Catalyst)

Catalyst Advent Calendar

Catalyst::Plugin::AutoCRUD - Instant AJAX web front-end for DBIx::Class - metacpan.org

CatalystX::CRUD - search.cpan.org

Using jqGrid with Catalyst: Tutorial with Examples for Newbies | j0e [blogs.perl.org]

Using Catalyst::Controller::REST with jqGrid: Tutorial with Examples for Newbies | j0e [blogs.perl.org]

catable/App-Catable at master · shlomif/catable - Catable is a blog engine based on Catalyst, DBIx::Class and other technologies.


Mojolicious
Mojolicious - Perl real-time web framework

Writing websocket chat using Mojolicious::Lite · kraih/mojo Wiki · GitHub

Example applications · kraih/mojo Wiki · GitHub

Mojolicious::Guides::Cookbook - Cookbook

kraih/mojo · GitHub Home · kraih/mojo Wiki · GitHub


plu/github-meets-cpan · GitHub - The app is deployed to dotCloud and uses MongoDB for storing the data. The software is written in Perl using the Mojolicious framework.

tempire/MojoExample · GitHub - Mojolicious example with DBIx::Class schema load, deploy, fixtures, and tests.

Joel Berger [blogs.perl.org]

jberger/Galileo · GitHub - Galileo is a Perl CMS written using Mojolicious, DBIx::Class, PageDown,Bootstrap,jQuery,HumaneJS,DBIx::Class::DeploymentHandler,Module::Build,jberger/Mojolicious-Plugin-InstallablePaths

Welcome to Contenticious - build web sites from markdown files - Contenticious

memowe/contenticious · GitHub  - build web sites from markdown files

Mojolicious::Plugin::Mount - search.cpan.org - a plugin that allows you to mount whole Mojolicious applications.

catz - The world's most advanced cat show photo engine - see what happens behind the scene! @ catza.net - the meowing revolution of cat show photos



issues I've found with Mojo,hypno,and mango
if you install EV on windows, morbo will crash telling you that "EV does not work with ithreads."

morbo startup failure on Windows 7 with Perl v5.14.2 built for MSWin32-x86-multi-thread · Issue #391 · kraih/mojo · GitHub - the solution is to "set MOJO_REACTOR=Mojo::IOLoop::Poll" which makes mojo not use EV for the event loop and instead uses a pure-Perl event loop that always works.



Looking at old code from github it looks like at one point mojo allowed the use of b() within templates.  The code imports the Mojo::ByteStream module as 'b', but that doesn't flow through to the templates as it did?

Running example code I would get something like: Undefined subroutine &Mojo::Template::SandBox::b called at template

anyways, one solution as specified in the Mojo::Template docs, is to create a new Mojo::ByteSteam inline.

Replace b() with Mojo::ByteStream->new().



Sometimes I recieve a "Non-blocking operations in progress at Mango/Cursor.pm" when hosting out of hypnotoad.

Non-blocking operations in progress at Mango/Cursor.pm - Google Search - show some others experiencing the trouble too..





Steve.org.uk: The templer static-site generator - skx/templer - A static-site-generator, written in perl with per-page variables and layouts. Textile, Markdown, or plain HTML

skx/static-site-generators - A mini-review of static site generators from Templer's author.





Devel::Declare - Adding keywords to perl, in perl - metacpan.org

Dependency Injection || Inversion of Control in Perl || IoC in Perl
containers, and containers of containers providing services so your doesn't have to worry about it.

Bread::Board - search.cpan.org

Bread::Board::Declare - create Bread::Board containers as normal Moose objects - metacpan.org - services declared as attributes.





Object Systems in Perl
package namespaces and subroutines, and you could bless anything to an object.

perlobj - perldoc.perl.org

cpan> m /^M(?:o(?:o|[ou]se)?)?$/

Module  < M
Module  < Mo
Module  < Moo
Module  < Moose
Module  = Mouse

Moose,Mouse (uses XS,faster),Any::Moose (uses Mouse unless Moose already loaded)

stevan/p5-mop - GitHub - Meta Object Protocol, or MOP, to be perhaps included in a future version of Perl 5.

Qore Programming Language - embeddable multi-threaded programming language.

Moose - A postmodern object system for Perl

perlcast.com » Stevan Little on Moose

Jesse Luehrs / Moose - search.cpan.org

Dave Rolsky / Moose - search.cpan.org -Moose is a complete object system for Perl 5.

Call of the Moose - Moose blog

perl5i - Fix as much of Perl 5 as possible in one pragma - metacpan.org

Matt S Trout / Moo - search.cpan.org - Moo - Minimalist Object Orientation (with Moose compatiblity)

Object::InsideOut - search.cpan.org - support for implementing classes using the inside-out object model.

Object::InsideOut
Quick Reference - Yani





DBIx || DBIx::Class || DBIC
Testing DBIx::Class Models without the Database - Modern Perl Books, a Modern Perl Blog

DBIx::Class — An ORM for Perl that is extensible and flexible

Hacking Thy Fearful Symmetry - DBIx::Class::DeploymentHandler is Awesome

Arthur Axel "fREW" Schmidt / DBIx-Class-DeploymentHandler - search.cpan.org

DBIx::Class::Manual::DocMap - search.cpan.org

DBIx::Class::Manual::Intro - search.cpan.org

DBIx::Class::Manual::Cookbook - search.cpan.org

DBIx::Custom - search.cpan.org

DBIx::QueryLog - search.cpan.org - Logging queries for DBI I want to full view the SQL that is run by DBI in DBIx :: QueryLog! - Perl Advent Calendar Japan 2011 Dbix Track

SQL::Interp - search.cpan.org - Interpolate Perl variables into SQL statements SQL :: Interp - Yet Another Hackadelic

Introduction to DBIx::Lite - Kyoto.pm tech talk #2

Catalyst::Model::DBIC::Schema - search.cpan.org

Catalyst Advent Calendar - Day 16 - Advanced Search in web DBIx::Class based applications (with tags, full text search and searching by location)

DBSchema::Sample - search.cpan.org

DBIx::Recordset::Playground - search.cpan.org





Unicode in Perl
Unicode: Good, Bad, & Ugly

Tom Christiansen’s Materials for OSCON 2011

Unicode::Tussle - search.cpan.org

Unicode Perl Best Practices | ADAM JC TAYLOR





Perl v6
Perl 5 to Perl 6 - Arrays

perl5i - Fix as much of Perl 5 as possible in one pragma - metacpan.org

Perl 6 / Perl 6





packaging modules, dists, tasks, etc.
Building Perl projects with MakeMaker





perldoc
  Internals and C Language Interface

        perlembed           Perl ways to embed perl in your C or C++ application

        perldebguts         Perl debugging guts and tips

        perlxstut           Perl XS tutorial

        perlxs              Perl XS application programming interface

        perlxstypemap       Perl XS C/Perl type conversion tools

        perlclib            Internal replacements for standard C library functions

        perlguts            Perl internal functions for those doing extensions

        perlcall            Perl calling conventions from C

        perlmroapi          Perl method resolution plugin interface

        perlreapi           Perl regular expression plugin interface

        perlreguts          Perl regular expression engine internals


        perlapi             Perl API listing (autogenerated)

        perlintern          Perl internal functions (autogenerated)

        perliol             C API for Perl's implementation of IO in Layers

        perlapio            Perl internal IO abstraction interface


        perlhack            Perl hackers guide

        perlsource          Guide to the Perl source tree

        perlinterp          Overview of the Perl interpreter source and how it works

        perlhacktut         Walk through the creation of a simple C code patch

        perlhacktips        Tips for Perl core C code hacking

        perlpolicy Perl development policies

        perlrepository           Using git with the Perl repository

perlobj -  Perl object reference

perlfaq1 – General Questions About Perl

perlfaq2 – Obtaining and Learning about Perl

perlfaq3 – Programming Tools

perlfaq4 – Data Manipulation

perlfaq5 – Files and Formats

perlfaq6 – Regexes

perlfaq7 – General Language Issues

perlfaq8 – System Interaction

perlfaq9 – Networking





HTTP in perl
Simple http server one-liner for some static files?

App::HTTPThis - App::HTTPThis - Export the current directory over HTTP (using plack)

HTTP::Server::Brick - HTTP::Server::Brick - Simple pure perl http server for prototyping "in the style of" Ruby's WEBrick. using LWP.

miyagawa/Twiggy - AnyEvent based non-blocking PSGI web server (like Thin) 

Mechanize and Bypassing SSL Certificate Check - export PERL_LWP_SSL_VERIFY_HOSTNAME=0, or constructor option WWW::Mechanize->new(ssl_opts => {verify_hostname => 0, },);





slaughter
Steve.org.uk - The Slaughter System Administration & Automation Tool - skx/slaughter

The Definitive Slaughter Guide - skx/slaughter-book - The definitive slaughter guide

skx/slaughter-policies - slaughter policies skx uses on his hosts.





App::cmd
App::Cmd - write command line apps with less suffering - metacpan.org

Reverse CPAN dependencies: App-Cmd - list of cmdline apps using App::Cmd depended-on-by.pl





Debug perl || step through perl code
Devel::hdb - Perl debugger as a web page and REST service - metacpan.org

How to use the debugger with Moose | Ovid [blogs.perl.org] - use DB::Skip - make the perl debugger skip statements in given packages or subs





Managing multiple perls
Acme Envy - oylenshpeegul's blog - the latest versions of Perl, Python, and Ruby at your disposal. 

plenv, alternative for perlbrew - Tatsuhiko Miyagawa's blog

tokuhirom/plenv - plenv - perl binary manager





Perl module packaging tips and stuff
Adopt a CPAN module - The good, the bad, and the beautiful

How to make CPAN-like module

Git-CPAN-Patch-1.3.1 - Patch CPAN modules using Git - metacpan.org - Perl programming language

Distribution::Cooker - Create a module directory from your own templates - metacpan.org - Perl programming language

module-starter - creates a skeleton module distribution - metacpan.org - Perl programming language

Dist::Milla - Distribution builder, Opinionated but Unobtrusive - metacpan.org - Perl programming language - milla new Dist-Name;cd Dist-Name;milla build;milla release





App::Ack
ack, an awesome grep replacement.

Beyond grep: ack 2.08, a source code search tool for programmers - ack is simple to install, via CPAN.

Colorize log output with ack | powdahound.com

How To Install and Use Ack, a Grep Replacement for Developers, on Ubuntu 14.04 | DigitalOcean

echo '--pager=less -RFX' >> ~/.ackrc






Testing in perl
Test::Tutorial - A tutorial about writing really basic tests - metacpan.org

Test::BDD::Cucumber::Manual::Tutorial - Quick Start Guide - metacpan.org





Perl::Critic
Perl::Critic - Some Ways Are Better Than Others (LOVE tag line)

Params::Validate - metacpan.org - Perl programming language - Validate method/function parameters





Performance in Perl
Dumbbench - More reliable benchmarking with the least amount of thinking - metacpan.org - Perl programming language

Coro - search.cpan.org

Perl: Coro asynchronous

Introduction to Coro





Mason
Mason - Mason - Powerful, high-performance templating for the web and beyond

Poet - search.cpan.org - Poet -- a modern Perl web framework for Mason developers

Poet::Manual::Tutorial - search.cpan.org





PerlPowerTools || ppi || cool things to do with perl
There seems to be quite a few power tools for perl.  A Unix Reconstruction idea, implementing things that might not normally come out of the box... banner and all.

ppt-0.14 - - metacpan.org by Casey West (CWEST) - metacpan.org

PerlPowerTools - BSD utilities written in pure Perl - metacpan.org by brian d foy (BDFOY) - metacpan.org

TMTOWTDI - you can name things however you like. Perl Power Tools hoelzro/perl-power-tools - Rob Hoelz from booking.com talk on cpanm,local::lib, and other favorites;




Schwartzian transform - Wikipedia - Schwartzian transform is a version of a Lisp idiom known as decorate-sort-undecorate, which avoids recomputing the sort keys by temporarily associating them with the input items. first implemented in perl...






Dare I say? Perl itself is a power tool.  Stop; You're all right.
    

    Created: 2005-05-04 23:20:10
    Modified: 2017-04-13 02:30:33