BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Re: Collection of thoughts about "Collections" ... follow up          BorlandTalk.com Forum Index -> Delphi OO design View previous topic :: View next topic   Author Message Joanna Carter [TeamB] Guest Posted: Tue Dec 20, 2005 9:53 am    Post subject: Re: Collection of thoughts about "Collections" ... follow up "BobW" <Testing (AT) Please (DOT) Ignore> a écrit dans le message de news: 43a76f81$1 (AT) newsgroups (DOT) borland.com... Hi Bob, could I suggest that this is much too technical for the non-tech group ) I will set follow-up to the oodesign group where you will find enough OO skills to cause your brain to start overheating ! Quote: Now to "collections" ... in a real-life problem ... or my real-life problems, I am not sure collections would be sufficient in most instances. Being a civil/environmental engineer, I need to describe "connected systems" such as storm drainage systems and water distribution systems. For all you non-civil engineers, in a storm drainage system, each node (manhole, inlet, etc) has one and only one "immediate downstream node" except the very most downstream node which has a NIL downstream node ... by contrast each node has several (zero to infinite) "immediate upstream nodes". I can describe that topology with with linked-list but I cannot even imagine how to describe that connectivity using "collections". Am I missing something? Simply put, you would have something like this : TNodeList = class; // forward declaration TNode = class private ... public property DownstreamNode: TNode ... // read/write property UpstreamNodes: TNodeList ... // readonly ... end; TNodeList = class private fitems: TObjectList; public constructor Create; procedure Add(node: TNode); procedure Remove(node: TNode); property Item[Index: Integer]: TNode; ... end; I would also agree with Bob Dawson in that you ought to consider the possibility of more than one downstream nodes; just in case it happens in the future, then it will not break your code :-) Quote: I know this (a non-technical NG) might be the wrong place for this, but y'all are so pleasant and bright I thought I would bounce it off of you. I have set follow-up to the oodesign group, please continue the conversation there. Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top BobW Guest Posted: Tue Dec 20, 2005 11:46 am    Post subject: Re: Collection of thoughts about "Collections" ... follow up Quote: ... to cause your brain to start overheating ! Yeah, that is what I was afraid of. It never feels good when it is hot. Bob "Joanna Carter [TeamB]" <joanna (AT) not (DOT) for.spam> wrote Quote: "BobW" <Testing (AT) Please (DOT) Ignore> a écrit dans le message de news: 43a76f81$1 (AT) newsgroups (DOT) borland.com... Hi Bob, could I suggest that this is much too technical for the non-tech group ) I will set follow-up to the oodesign group where you will find enough OO skills to cause your brain to start overheating ! | Now to "collections" ... in a real-life problem ... | or my real-life problems, I am not sure collections | would be sufficient in most instances. Being a civil/environmental | engineer, I need to describe "connected systems" such | as storm drainage systems and water distribution | systems. For all you non-civil engineers, in a storm drainage | system, each node (manhole, inlet, etc) has one and only one | "immediate downstream node" except the very most downstream node | which has a NIL downstream node ... by contrast each node | has several (zero to infinite) "immediate upstream nodes". | I can describe that topology with with linked-list | but I cannot even imagine how to describe that connectivity | using "collections". Am I missing something? Simply put, you would have something like this : TNodeList = class; // forward declaration TNode = class private ... public property DownstreamNode: TNode ... // read/write property UpstreamNodes: TNodeList ... // readonly ... end; TNodeList = class private fitems: TObjectList; public constructor Create; procedure Add(node: TNode); procedure Remove(node: TNode); property Item[Index: Integer]: TNode; ... end; I would also agree with Bob Dawson in that you ought to consider the possibility of more than one downstream nodes; just in case it happens in the future, then it will not break your code :-) | I know this (a non-technical NG) might be the wrong place | for this, but y'all are so pleasant and bright I thought | I would bounce it off of you. I have set follow-up to the oodesign group, please continue the conversation there. Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top Jim Cooper Guest Posted: Tue Dec 20, 2005 5:31 pm    Post subject: Re: Collection of thoughts about "Collections" ... follow up Quote: ... to cause your brain to start overheating ! Yeah, that is what I was afraid of. It never feels good when it is hot. The main thing is to remember *not* to apply the marshmallows directly to your head. You'll never get them out of your hair. Cheers, Jim Cooper __________________________________________ Jim Cooper [email]jcooper (AT) tabdee (DOT) ltd.uk[/email] Skype : jim.cooper Tabdee Ltd http://www.tabdee.ltd.uk TurboSync - Connecting Delphi to your Palm __________________________________________ Back to top Joanna Carter [TeamB] Guest Posted: Tue Dec 20, 2005 6:16 pm    Post subject: Re: Collection of thoughts about "Collections" ... follow up "Brent S." <brentatatmosoftdotcom> a écrit dans le message de news: 43a84018$1 (AT) newsgroups (DOT) borland.com... Brent, could I ask you to join the discussion in oodesign, this stuff is way over the heads of the average non-tech reader ) I have set follow-up there Thanks Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top Bob Guest Posted: Tue Dec 20, 2005 7:31 pm    Post subject: Re: Collection of thoughts about "Collections" ... follow up Quote: The main thing is to remember *not* to apply the marshmallows directly to your head. You'll never get them out of your hair. Maybe follow up should now be set back to Non-Tech? <g> "Jim Cooper" <jcooper (AT) tabdee (DOT) ltd.uk> wrote Quote: ... to cause your brain to start overheating ! Yeah, that is what I was afraid of. It never feels good when it is hot. The main thing is to remember *not* to apply the marshmallows directly to your head. You'll never get them out of your hair. Cheers, Jim Cooper __________________________________________ Jim Cooper [email]jcooper (AT) tabdee (DOT) ltd.uk[/email] Skype : jim.cooper Tabdee Ltd http://www.tabdee.ltd.uk TurboSync - Connecting Delphi to your Palm __________________________________________ Back to top Joanna Carter [TeamB] Guest Posted: Tue Dec 20, 2005 7:58 pm    Post subject: Re: Collection of thoughts about "Collections" ... follow up "Bob" <Bob (AT) bob (DOT) com> a écrit dans le message de news: [email]43a85b68 (AT) newsgroups (DOT) borland.com[/email]... Quote: Maybe follow up should now be set back to Non-Tech? Naah, stick around long enough and Jim will buy the beers; that's right isn't it Jim ? :-) Joanna -- Joanna Carter [TeamB] Consultant Software Engineer Back to top Jim Cooper Guest Posted: Wed Dec 21, 2005 12:42 am    Post subject: Re: Collection of thoughts about "Collections" ... follow up Quote: Naah, stick around long enough and Jim will buy the beers; that's right isn't it Jim ? That's right :-) Cheers, Jim Cooper __________________________________________ Jim Cooper [email]jcooper (AT) tabdee (DOT) ltd.uk[/email] Skype : jim.cooper Tabdee Ltd http://www.tabdee.ltd.uk TurboSync - Connecting Delphi to your Palm __________________________________________ Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> Delphi OO design All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.