INTENSITY²
Start here => Free For ALL => Topic started by: garmonbozia on March 17, 2009, 05:27:42 PM
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I've been programming in Perl for years, but for a project I've got going now, I really need to write it in object-oriented form. Anyone here know any websites that have information on the proper syntax, etc. for object-oriented Perl? There's a book I could get that's about $13 used on Amazon (and $40 new in stores), but I'd prefer to save the money.
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Not any sites that I can recall, right now, but get Damian Conway's book on object-oriented Perl. It's brilliant.
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:thumbup: That's the exact book I was thinking about getting.
On the web, I can find bits and pieces at best, so I guess I'll have to buy the book.
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Like I said, it's brilliant. There is the O'Reilly book on object-oriented Perl, too, but I like Conway a lot better.
How long have you been coding in Perl?
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I've been using it on-and-off since 1996.
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I ordered a used copy of the Conway book. Should have it in a couple of weeks.
Hopefully, I'll be able to re-organize the project I've been working on just for fun. The code is currently written procedurally and looks like shit. Too many variables to keep track of.
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Good luck with it. It's been a while since I used Perl, at all. My only programming has been with XSLT.
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That's the thing about I.T. Turn your attention elsewhere for even a short time, and when you look again, there's a whole new bumper-crop of acronyms you've never heard of. That's how it feels whenever I visit the computer books section in Borders. Maybe I need to subscibe to some journals.
The project I keep mentioning is a just-for-fun project on one of my home computers. If I ever want to get to where the real money is in I.T., I need to keep up with all the latest shit. (I currently work in a small niche field in I.T.)
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Me, I'm sort of backwards cos I want to master C programming. Who cares about object orientation? :zoinks:
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I think I got ripped-off on Amazon. I ordered a used copy from one of those third-party sellers who sell through Amazon. There was a window of time for the delivery estimate. That ended yesterday. Still no book. I left a message for the seller and haven't heard back yet. I'll probably be filing a claim for a refund as per Amazon's policies.
That was a first-time seller. (Never buying from one of those again.) Let's see how they like a shitty review from their first customer if I don't get either the book or my fuckin' money back real soon.
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This is all I think of when I see this post :laugh:
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I'm learning C++ at the moment. I've used Python on and off for about 4 years, but I've gotten frustrated at how slow it is for the things I want to do. I'm learning by reading and reverse-engineering code snippets I find online, and by going through online tutorials and things. The learning curve is pretty steep, but I'm starting to get the hang of the basics, and it's satisfying being able to control things at the level of individual bytes after having had all the low level details hidden from me with Python.
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I studied C++ for a couple of years, can't remember much though, haven't used it since. Something about Orange Oriental Pro-growing. ???
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I think I got ripped-off on Amazon. I ordered a used copy from one of those third-party sellers who sell through Amazon. There was a window of time for the delivery estimate. That ended yesterday. Still no book. I left a message for the seller and haven't heard back yet. I'll probably be filing a claim for a refund as per Amazon's policies.
That was a first-time seller. (Never buying from one of those again.) Let's see how they like a shitty review from their first customer if I don't get either the book or my fuckin' money back real soon.
The thing to remember is that these are only estimates. A couple of days more is certainly not unheard of. :-\
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The book arrived today. So, I cancelled my rip-off claim. It was advertised as "used - like new", but I'd estimate its condition as "fair" because it has some water damage with a few pages sticking together but easily separated. (I hope that was just water, anyway.) It was FedEx'ed with the date on the form being five days after the time estimate ended (in an addressed kraft envelope inside a FedEx envelope). I guess Amazon got on their ass or otherwise reminded them they were sitting on paid-for merchandise. They better hope I'm in a good mood when prompted for a review.
Now that that shit's over with, I can get on to re-coding my project and turning it into something truly useful.
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I hope you can enjoy that book, after all the trouble it has caused you. :)
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http://www.youtube.com/watch?v=v5Gsc89TUXg
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I've been reading the recently-acquired book and also a few that I've had for years, and last night I did some practice coding. I wanted to make sure I have the Perl modules available to put a GUI on this project. I thought I'd be using Tk, which I have a whole book about. I couldn't figure out how to install it, but saw that I already have a similar module called Tkx. Only thing is, Tkx has a syntax that is rather different from Tk. I'll need to find some good reference material on it. I did manage to stumble around and make a "Hello, world" program (a tradition for when you're working with a new language or making sure a language works on your computer) and then add onto it. This one has a text field and two buttons. When you click one of the buttons, whatever you've got in the text field gets spit out onto the MS-DOS console. The other button closes the program. No real purpose, except for practice.
I also plan to practice using "hash" data structures and then see if I've got the Perl DBI module. DBI is what lets your program keep its information in a real database (e.g. PostgreSQL or MySQL) and not just a bunch of text files.
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Let me know how it goes. :)
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Certainly.
I did check the Perl Package Manager console yesterday and saw that it's already got DBI. So, hopefully, I'll be able to try the exercises in my DBI book (Programming the Perl DBI by Alligator Descartes and Tim Bruce; O'Reilly and Associates; ISBN 1-56592-699-4) with no trouble.
The real fun will begin when I start writing stuff that uses Tkx, DBI, and ImageMagick all in one program with carefully-constructed data structures.
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You'll be using ImageMagick? Very cool.
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I've been using ImageMagick for a decade, in the Linux shell, the DOS prompt, and as the PerlMagick module... both at home and at work. Very useful when you need to do the same thing to hundreds of images all at once.
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Yes, it's a very useful library. We use it for our document management system, to generate previews.
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Interesting. I work in document management.
The project I'm working on at home, I guess I could accurately describe as my own spin on digital asset management. It will be a piecing-together of various small imaging-related programs I've written for my own use over the past ten years.
As for O-O Perl, since getting the book and also consulting some other books in my collection, I've written a couple of little test programs. So far, I've succeeded at using O-O Perl with the modules for graphics (ImageMagick) and user interfaces (Tkx). The past few days, I've been studying the use of DBI, the module for databases. I've got several years experience with ImageMagick, so I need no further practice with that. Once I've got the hang of Tkx and DBI, I'll be ready to do the serious work on my project.
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Been practicing with the DBI. I was originally trying to decide between MySQL and PostgreSQL. I decided on another one called SQLite because the others require you to have a server process running in the background at all times, even when you're not using the database. With SQLite, the database is just another type of data file, but still "speaks" SQL. Besides, it's already included with ActiveState Perl if you've got the DBI.
Last night I practiced by adding some database usage to a program I had originally written to practice with text fields in Tkx. Every time you process the information in the text boxes, it saves it to a SQLite database. The goal is to get the program to remember what was in the text boxes the last time it ran. Currently, it's adding a newline character ( '\n' ) to the end of every string in the text boxes after recalling it from the database. I need to figure out where along the way it's picking up the newline character and stop it from doing that.
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Figured out the newline issue. I needed to be using the "chop" command when adding data to the database. Today, I gave the test program the ability to remember its past settings in an SQLite database and allow the user to scroll through the database records and retrieve them. The program doesn't do anything important. It's just to practice my programming skills for later use in writing a planned program with a practical purpose.
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Chop is very useful for other stuff as well. Try writing a simple XML parser without it.
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Now that I've figured out the use of a database and some basics on GUI, I've started practicing with the Tkx canvas. Been trying to figure out how to read an image from a JPEG and put it into the canvas.
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Never did much of that, me.
But today, for the first time in years, really, I did some Perl hacking. Me and a mate at work did some stuff to a couple of hundred XML files. They needed fixing after a bug in the CMS caused some trouble.
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I've never done much with XML. I assume it can be used in a similar manner to a database? From what I've seen, it looks like you need to decide your data layouts very carefully at the very start. I decided to stick with SQLite and its .dbl files, because I'm more comfortable using a data format that speaks SQL.
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Well, XML is actually more about document structuring, not data management, even though it's been used for practically everything. XML is my bread and butter, and it's plain text, basically, making Perl suitable for manipulating it.
Well, unless you want to do stuff with an XML-aware library but that's a whole different game.
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*lurks, hoping at some point to have something useful to contribute*
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*lurks, hoping at some point to have something useful to contribute*
Lmao i'm too dumb for this shit. :zoinks:
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*lurks, hoping at some point to have something useful to contribute*
Do you program in Perl? And if so, what do you use it for?
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I used to, at one of the other studios I worked for. I used it with Glade to make a tool for easily mass-editing render settings in RIB files. Simple search-and-replace text stuff, but with an interface that a non-tech could understand.
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Perl is very well suited for that kind of thing. I've done lots of that in the past.
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I recently ordered a book on SQLite. (Info on the web is spotty and it's hard to zero in on just the info you need.) My recent apartment move has all but drained my energy, but eventually I plan to get back to my project. Then I can try to figure out the best way to structure data, both in-memory and stored on-disk in databases.
I'll probably eventually get a book on ImageMagick. I've been using that for over a decade, and it does have a good knowledge base on its website, but it may still pay to go through a tutorial or otherwise have a quick reference on paper.