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Object Oriented Programming

  • #1
  • First Post: Apr 26, 2010 10:30am Apr 26, 2010 10:30am
There aren't too many useful guides for MQL5 out just yet, and I was wondering if anyone could recommend a good object oriented programming book.

I'm familiar with the power of object oriented programming, but I have no idea how to wield it.
  • #2
  • Apr 26, 2010 1:44pm Apr 26, 2010 1:44pm
You can checkout some suggestions here: http://stackoverflow.com/questions/1...op-programmers

Another tip I have for you: ditch PHP for your other projects (tick database, ...) and replace it with Python. Python is much more object-oriented that PHP, and it has a proper object-oriented paradigm, unlike PHP.

Yes, I'm a big Python fan, but I'm not trying to push Python here. Working with Python will make you work with objects, while working in PHP you mostly use global functions.

PHP:
f = fopen(filename, ...)
data = fread(f, ....)

Python:
f = open(filename, ...)
data = f.read(...)

And the obvious advice: practice, practice, practice. It will take a while to wrap your head around objects. Don't be intimidated by stuff like polymorphism. You can ignore that at first.
  • #3
  • Apr 26, 2010 1:55pm Apr 26, 2010 1:55pm
Sorry, but your knowledge about PHP is very outdated. It's object-oriented for many years.


Quoting Adal
You can checkout some suggestions here: http://stackoverflow.com/questions/1...op-programmers

Another tip I have for you: ditch PHP for your other projects (tick database, ...) and replace it with Python. Python is much more object-oriented that PHP, and it has a proper object-oriented paradigm, unlike PHP.

Yes, I'm a big Python fan, but I'm not trying to push Python here. Working with Python will make you work with objects, while working in PHP you mostly use global functions.

PHP:
f =...
  • #4
  • Apr 26, 2010 2:44pm Apr 26, 2010 2:44pm
Quoting Orest
Sorry, but your knowledge about PHP is very outdated. It's object-oriented for many years.
That's highly debatable: http://michaelkimsal.com/blog/php-is...ject-oriented/

What would be the file object which has the read method as in the Python example I posted?

Anyway, we're getting off-topic.
  • #5
  • Apr 26, 2010 3:06pm Apr 26, 2010 3:06pm
We probably are talking about different paradigms here. It's perfectly possible PHP doesn't have a File object (last time i checked it did have Directory object though). What I meant was you could design and implement object oriented model in PHP, so it allows you to create your base and extended classes, implement inheritance, polymorphism, encapsulation, all properties of object-oriented language are there. I hope you agree that using some parts of the language like files it doesn't really matter to call a method on the object or procedure.


Quoting Adal
That's highly debatable: http://michaelkimsal.com/blog/php-is...ject-oriented/

What would be the file object which has the read method as in the Python example I posted?

Anyway, we're getting off-topic.
  • #6
  • Apr 26, 2010 3:06pm Apr 26, 2010 3:06pm
I don't know why I'm talking about real programming on FF but... being both a Python and PHP developer for my own company I can say that the most important thing is to GET THE JOB DONE.

PHP came a long way, it is OO enough to structure your code in a very clean way, and although I like Python better the real question is which one gets the job done faster and for me it is PHP. So before learning/using a new language really ask yourself if you trully need it.

I'm out. Goodluck.
Trading = a mirror to your human flaws. Fix them or be fixed.
  • #7
  • Apr 26, 2010 3:18pm Apr 26, 2010 3:18pm
I think to redefine the goal...

I'm trying to learn how to program for MQL5. Problem is there is relatively minimal documentation regarding object oriented programming. So, the next best thing is to find some resource that explains OOP.

As for my usage of PHP, my tick database is indeed running on php scripts which I found elsewhere online and have modified for use with the tick database. The code is by no means efficient. The current version is capable of taking 2,000 ticks/second. That's far more capacity than what I currently need (300 Ticks/second). Once users of the tick database increase, I'll probably move to a flat-file based input system with a cron job running at the end of the week merging those files into the database.

I'm also exploring the possibility of a P2P-style tick database.
  • #8
  • Apr 26, 2010 3:34pm Apr 26, 2010 3:34pm
subscribed.

All I found on mql5 so far is at http://www.mql5.com/en/docs
  • #9
  • Apr 26, 2010 6:08pm Apr 26, 2010 6:08pm
Quoting soso
I don't know why I'm talking about real programming....
Nobody can call themselves a real programmer unless they've written assembly language on an IBM S/360.
  • #10
  • Apr 26, 2010 6:30pm Apr 26, 2010 6:30pm
Quoting hanover
Nobody can call themselves a real programmer unless they've written assembly language on an IBM S/360.
Obligatory: http://foldoc.org/The+Story+of+Mel

But soso does have a point
  • #11
  • Apr 26, 2010 11:13pm Apr 26, 2010 11:13pm
Quoting soso
I don't know why I'm talking about real programming on FF but... being both a Python and PHP developer for my own company I can say that the most important thing is to GET THE JOB DONE.

PHP came a long way, it is OO enough to structure your code in a very clean way, and although I like Python better the real question is which one gets the job done faster and for me it is PHP. So before learning/using a new language really ask yourself if you trully need it.

I'm out. Goodluck.
I agree
  • #12
  • Apr 27, 2010 2:06am Apr 27, 2010 2:06am
Wohohoho...
an OO approach to code indicator/experts or anything else..
so much power for such a task, i wonder..
-1128 Pips since 6 August 2007
  • #13
  • Apr 27, 2010 3:34am Apr 27, 2010 3:34am
Quoting Ronald Raygun
There aren't too many useful guides for MQL5 out just yet, and I was wondering if anyone could recommend a good object oriented programming book.

I'm familiar with the power of object oriented programming, but I have no idea how to wield it.
The original.
http://www.amazon.com/Design-Pattern...2357222&sr=8-1
The breaking of a wave cannot explain the whole sea.
  • #14
  • Apr 27, 2010 6:41am Apr 27, 2010 6:41am
Quoting soso
So before learning/using a new language really ask yourself if you trully need it.
If you stop learning new languages and new paradigms all the time until the day your fingers cannot use the keyboard anymore then you have stopped being a programmer because you have lost all interest in the whole matter.
  • #15
  • Apr 27, 2010 6:52am Apr 27, 2010 6:52am
Quoting Orest
Sorry, but your knowledge about PHP is very outdated. It's object-oriented for many years.
The fact that it is possible to write clean and proper OO code in php for someone who knows how to apply these concepts does not imply that php is a good language to learn OO concepts. In fact the exact opposite is the case: People who "learned" programming with php as a first language will have to learn programming again from scratch if they want to become programmers (and not only call themselves "programmers").
  • #16
  • Apr 27, 2010 7:00am Apr 27, 2010 7:00am
Quoting Ronald Raygun
There aren't too many useful guides for MQL5 out just yet, and I was wondering if anyone could recommend a good object oriented programming book.

I'm familiar with the power of object oriented programming, but I have no idea how to wield it.
One language I knew was C when I decided to take on OOP around 15 years ago, so I went the C++ route with this book and it got my head around the concept pretty painlessly...

Sams Teach Yourself C++ in 21 Days - by Jesse Liberty

C++ is still used a lot, and to top it off, MQL5 is aligned very closely to it.
Bundy's status today: "Waiting..."
  • #17
  • Apr 27, 2010 7:05am Apr 27, 2010 7:05am
Quoting bundyraider
C++ is still used a lot, and to top it off, MQL5 is aligned very closely to it.
IMHO it should be considered a crime recommending C++ to a newbie.
  • #18
  • Apr 27, 2010 7:11am Apr 27, 2010 7:11am
Quoting 7bit
If you stop learning new languages and new paradigms all the time until the day your fingers cannot use the keyboard anymore then you have stopped being a programmer because you have lost all interest in the whole matter.
Agree with you and that's the whole point, that's why I said if you trully need it. For you the important thing the excitement factor that comes with a new language and all the side learning - nothing wrong with that -, for me it is more important to get the job done and focus on other things too.
Trading = a mirror to your human flaws. Fix them or be fixed.
  • #19
  • Apr 27, 2010 7:13am Apr 27, 2010 7:13am
Quoting 7bit
IMHO it should be considered a crime recommending C++ to a newbie.
I second that! Better to stay away from that beast!

And on top of that the MT guys would have been better if they improved on top of MT4 rather than creating something new. Imo.
Trading = a mirror to your human flaws. Fix them or be fixed.
  • #20
  • Apr 27, 2010 7:18am Apr 27, 2010 7:18am
Quoting soso
And on top of that the MT guys would have been better if they improved on top of MT4 rather than creating something new. Imo.
They should have made an API to make it possible to write EAs in any language instead of creating yet another incompatible half-baked programming language.
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