Sometimes it makes code harder to read so I say never use it unless it's a perlish function like map where it is obvious what it refers to. :) I thought the $_ thing would be a bit controversial. You miss the point of programming in Perl.īe sure to read my standard disclaimer if this is a reply. Don't constrain Perl to just the parts that are C-like or Shell-like.
Yes, this even goes for the Schwartzian Transform, since that's not in a tutorial doc or Learning Perl, only a FAQ item.īut the biggest point I hope you're seeing is that you should write native Perl when you are writing Perl.
#Perl coding how to#
#Perl coding series#
Has read all the applicable tutorial series in the core docs.How will you do a grep or map? Or are you proposing coding everything in babybaby Perl?Ī reasonable standard for presumption of the skill level of your maintenance programmer is: I also have problems with some of your specific rules. Is this one of the times that you avoid use strict, or not?
On one of our slides, I bring up the example "you should generally 'use strict'" as a sample bad rule. A checklist item is useful if everyone could agree that you are following it, but otherwise it simply becomes a way to butt heads in a code review session. The biggest problem with your list is that you have very little that can be objectively tested. I've been researching this problem in upgrading our code review course and code review services recently. Where code returns a result it should do so or die with a meaningful error and $! Error handling done using Begin blocks at CGI level. Use verbs for subroutines, use nouns for variables, be descriptive and consistent.ģ1. All Perl filehandles should be in all uppercaseĢ7. Program flow control to be places in 'main' methodĢ5. Meaningful Subroutine and Variable names to be usedĢ1. Always retrieve database rows into hash reference not arraysĢ0. Any reused code block above 5 lines must become a sub routineġ5. Do not reinvent wheel always check CPANġ4. Config files or config scripts to be usedĩ. No hardcoding of values especially file paths, script names etcĨ. all files must be documented with POD (Author, Date created, synopsis, description)ħ. (As can the solutions in other languages.) Problem Sets and Competitive Programming Sitesâ List on GitHubĪ comprehensive list of sites with problem sets and/or for competitive programming - many of which can be solved in Perl.4. Note: the Perl solutions presented there can vary in quality. International Olympiad in Informaticsâ Previous Contest TasksĬontains a series of tasks, with solutions presented in as many programming languages as possible. Martyr2âs Mega Project Ideas ListĪ concentrated list of Project Ideas - on the Dream in Code forums. P-99: Ninety Nine Prolog ProblemsĪ list of 99 challenges with a focus on the Prolog programming language, but which can be solved using Perl. One can go over the archives of the mailing lists for some interesting problems to solve and their solutions. Perl Quiz of the WeekĪ now inactive series of challenges for solving using Perl that was started by Mark Jason Dominus. Solutions to the Euler Problems in the Haskell programming language - on the Haskell Wiki.Ī web search for a "euler" and a particular question number may also provide some insights.īut remember to always try to solve the challenges on your own first. Shlomi Fish's Solutions to Project Euler - mostly in Perl. In case you're having a difficulty, then you can find solutions to some of these problems here: One can learn a lot from solving these challenges. Project Eulerįrom the page: "Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve". The first edition of the book is available online. The book "Beginning Perl" by Simon Cozens and later on James Lee also contains some exercises. This page contains links to programming exercises and challenges that can be solved using Perl. In order to learn Perl well (or any other language), one eventually needs to write actual code with it. Learn Perl Now! And get a job doing Perl.
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