Looks like C# does not support Global Variables
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Luc Pattyn [My Articles] Nil Volentibus Arduum
Thanks Luc. Brian
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Hi Griff. I have come from a background of programming in Basic then Visual Basic, so I tend to slip into this type of programming. I understand that the class method is a more modern way to program. It's just getting my head around classes even when reading about them. Brian
And it shows! Instead of trying to get your head round how C# and OOPs design works, you're trying to force the code into your older methodology - and that doesn't produce good code! Modern software thinks in terms of objects and instances, just the same as you do in the "real world". You wouldn't create an array of all Cars and try to move them all relative to each other in the real world, you would create a CarPark with a collection of Levels, each of which would have a collection of ParkingSpaces - your Car instances would then park in a free ParkingSpace without any reference to where the other cars are parked because it's irrelevant - all you want to know is "is this space free", you don't care if it's Car[0], or Car[1], or Car[n] that is in the space, do you? And that is exactly what you do in the real world: you enter the car park then drive through it looking for the first empty space. When you leave, you go to the level you parked on, then to the space (and hope your car is still there). You drive out of the car park, and you are in a different area: the high street, which connects to Millers Lane at one end and the Bypass at the other. So why would you care about Sesame Street, which is half way across town? The High St "knows" what it's connected to: CarPark, Millers Lane, Bypass. And so on. So the the whole topology of the town is arranged as a series of connected places: Sesame St, Bypass, Millers Lane, High Street, etc. - they only need to know what they are connected to because that "lays out" how the town is arranged. Think about it, read the books - and this time don't skip stuff because "I know this from Basic" but try and get your head around how Object Oriented Programming helps you to reflect the real world more easily!
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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Yes I admit that I have always had problems in understanding classes and now and then I come across some code that makes it a bit easier to understand. I had considered using Lists but I think there was no direct access to the data in a list except using the foreach command. Brian
Member 14154627 wrote:
I had considered using Lists but I think there was no direct access to the data in a list except using the foreach command.
No, a List<T> is a "self expanding array" and can be accessed in the same way as an array:
List<string> items = new List<string>();
items.Add("Hello");
items.Add("World");
Console.Writeline(items[0] + " " + items[1]);For reference there is this: List<T> - Is it really as efficient as you probably think?[^] - don't look at it too hard now, it may be a little more advanced than you need at the moment.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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Member 14154627 wrote:
I had considered using Lists but I think there was no direct access to the data in a list except using the foreach command.
No, a List<T> is a "self expanding array" and can be accessed in the same way as an array:
List<string> items = new List<string>();
items.Add("Hello");
items.Add("World");
Console.Writeline(items[0] + " " + items[1]);For reference there is this: List<T> - Is it really as efficient as you probably think?[^] - don't look at it too hard now, it may be a little more advanced than you need at the moment.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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The idea is that you don't need global variables in C#, and by and large it's true. You can simulate them using
static:public static class Globals
{
public static int GlobalInteger = 666;
}
...
Console.WriteLine(Globals.GlobalInteger);but I've only done it with a handful of variables in all the C# code I've ever written. If you need lots of globals, it's normally a BIG sign that your whole design is wildly wrong. I'd seriously think about the whole structure of your app if I were you - it's sounding very much like you didn't read any of the books after all.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
Well, a lot of guys that come from the C/C++ world into C# really struggle with the memory management aspects of .Net. Like me. I have a static Globals class in pretty much every project I develop. Most of the stuff in my Globals classes are methods that don't really make sense to put into any other non-static class. Along with those methods, I have properties that only need to be set once in the program (many times, it's a complex object or list of objects), or that simplify access to system methods/vars (to ease typing elsewhere in the app).
".45 ACP - because shooting twice is just silly" - JSOP, 2010
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You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010
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When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013 -
Thanks Griff. I haven't used List before so I hope to try it out by typing some example code. Brian
:sigh: Stop doing that. Stop "trying it out" and "study it first" - then learn to use it effectively.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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:sigh: Stop doing that. Stop "trying it out" and "study it first" - then learn to use it effectively.
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
I did manage to come across a very good site that has a step by step guide of putting together a C# program. This should show me the whole picture of how things work together. [DELETED] Brian
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I did manage to come across a very good site that has a step by step guide of putting together a C# program. This should show me the whole picture of how things work together. [DELETED] Brian
Your other message with the same site came up in moderation - rightly - and has been closed as spam. I edited this one to remove the very similar link. PLease don't post links to "tutorial sites" again, as you will get flagged as a spammer and thrown off the site. I haven't started the process this time as I think it's innocent, or at least probably innocent, but if you post more then someone will. We don't like spammers, or people who look like spammers - understandable as this site it entirely paid for by advertising and letting people advertise for free would kill that revenue stream and the siet would close. So when you post a message like "I found this wonderful site ... url ..." you are going to be closed down pretty rapidly. Be told!
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
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Your other message with the same site came up in moderation - rightly - and has been closed as spam. I edited this one to remove the very similar link. PLease don't post links to "tutorial sites" again, as you will get flagged as a spammer and thrown off the site. I haven't started the process this time as I think it's innocent, or at least probably innocent, but if you post more then someone will. We don't like spammers, or people who look like spammers - understandable as this site it entirely paid for by advertising and letting people advertise for free would kill that revenue stream and the siet would close. So when you post a message like "I found this wonderful site ... url ..." you are going to be closed down pretty rapidly. Be told!
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
Looks like I should have read the rules to this site before posting. I'm used to seeing links in other sites. Thanks for pointing this out to me. Brian
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Your other message with the same site came up in moderation - rightly - and has been closed as spam. I edited this one to remove the very similar link. PLease don't post links to "tutorial sites" again, as you will get flagged as a spammer and thrown off the site. I haven't started the process this time as I think it's innocent, or at least probably innocent, but if you post more then someone will. We don't like spammers, or people who look like spammers - understandable as this site it entirely paid for by advertising and letting people advertise for free would kill that revenue stream and the siet would close. So when you post a message like "I found this wonderful site ... url ..." you are going to be closed down pretty rapidly. Be told!
Sent from my Amstrad PC 1640 Never throw anything away, Griff Bad command or file name. Bad, bad command! Sit! Stay! Staaaay... AntiTwitter: @DalekDave is now a follower!
One thing I don't understand Griff, I was given a link on this site to download a free book on C# (DotNetBookZero), how is that different from what I did by providing a link to a free pdf file that can be downloaded. Also some on this site have given me direct links to books I can buy on C#. Brian
