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OODP Review. Monday, July 31, 2006 I took a three hour mini-course on OO Design Principles. Now, go brush up on your OODP and more of its acronyms. 1) Polymorphism: behavior that varies depending on the function's class being invoked. 2) Hierarchy: a) Inheritance - allow a subclass to access members of the parent class. b) Aggregation - objects can contain one or more objects of another object. 3) Encapsulation: hide/reaveal particular details of a class. 4) Abstraction: hide the details of an subclass. 5) Objects/Classes: collection of characteristics that describe something whether it is abstract or tangible; object is an instance of a class. SRP (Single Responsibility Principle): a class should be responsible for only one thing. DRY (Don't Repeat Yourself): self explanatory, don't copy/paste. LSP (Liskov Substitution Principle): "Functions that use pointers or references to base classes must be able to use objects of derived classes without knowing it." DIP (Dependency Inversion Principle): "High level modules should not depend upon low level modules. Both should depend on abastractions. Abstractions should not depend of details. Details should depend on abstractions." OCP (Open Closed Principle): Classes, methods, functions "should be open for extension, but closed for modification." ISP (Interface Segregation Principle): "Clients should not be forced to depend upon interfaces that they do not use." CCP (Common Closed Principle): "Classes within a released component should share common closure. If one need to be changed, they all are likely to need to be changed. What affects one, affects all." ADP (Acyclic Dependency Principle): The dependency structure for released component must be a Directed Acyclic Graph. There can be no cycles." SDP (Stable Dependency Principle): "Dependencies between released components must run in the direction of stability. The dependee must be more stable than the depender." SAP (Stable Abstraction Principle): "The more stable a component is, the more it must consist of abstract classes. A completely stable category should consist of nothing but abstract classes." RREP (Reuse/Release Equivalency Principle):"The granularity of reuse is the same as the granularity of release. Only components that are released through a tracking system can be effectively reused." If you want to read more about any of these, go check out ObjectMontor. They have a lot more documents and articles there to read. I hope I'm not missing any important ones, if so add some to the list. 1 comments 
I When, You Lose. Thursday, July 27, 2006 (9:46:28 AM) Joseph: dang you for not bringing your tie fighter so spidey could fight it (9:48:30 AM) Thomas: lasers > web. (9:50:33 AM) Joseph: they're toys (9:50:43 AM) Joseph: we're not going into real reality (9:50:59 AM) Joseph: i'm not saying the REAL spiderman vs. a REAL tie fighter (9:51:05 AM) Joseph: i'm saying my toy vs yours (9:51:06 AM) Thomas: yeah, b/c real reality...there is such a thing of spiderman and tie fighters. (9:51:09 AM) Joseph: mine would SO when (9:51:14 AM) Thomas: SO WHEN? (9:51:15 AM) Thomas: haahaha (9:51:19 AM) Joseph: hahahaha (9:51:22 AM) Joseph: exactly 2 comments
Encoding Help Needed. Wednesday, July 19, 2006 Here's the plan: There's an XML file that contains plain text data. [Attempt 1]: Use PHP and some simple parsing to convert the data to look pretty. [Results]: Crazy characters like "Joan Miró" and "peoples’" [Attempt 2]: Use C# to parse the XML and output the file. [Results]: Crazy characters like "Joan Miró" and "peoples’" After a bunch of research, I found that the TextWriter class can encode the file: TextWriter tw = new StreamWriter("fileName" + ".txt"); TextWriter tw = new StreamWriter("fileName" + ".txt", false, Encoding.Default); TextWriter tw = new StreamWriter("fileName" + ".txt", false, Encoding.ASCII); TextWriter tw = new StreamWriter("fileName" + ".txt", false, Encoding.UTF8); All of them didn't work. I've been using Ultra Edit for a while and it can do multiple file conversions. So I give it a try...ASCII to Unicode, UTF-8 to Unicode, UTF-8 to ASCII, Unicode to ASCII, DOS to UNIX, UNIX/MAC to DOS. It all comes down to set the C# encoding to Encoding.Default and then converting the file from UTF-8 to ASCII. There's no other way. It sucks. Any suggestions? UPDATE This was what I originally had at the top of the XML file. <?xml version="1.0" encoding="utf-8"?> This was what I now have at the top of the XML file. <?xml version="1.0" encoding="utf-16"?> I also had to change the TextWriter initialization from: TextWriter tw = new StreamWriter("fileName" + ".txt"); to: TextWriter tw = new StreamWriter("fileName" + ".txt", false, Encoding.Default); Thanks, Abhi and kashif for the input. BTW: "PHP assumes your XML is in ISO-8859-1!" Even if you have it set as UTF-8. This is also why PHP isn't going to work for these files, BOO. If there is a real PHP solution, let me know. We're also trying another approach using a third party PHP DB interface. 4 comments
Hidden Fields Really Hidden? Thursday, July 13, 2006 I guess the developer didn't really understand how hidden fields really behaved. 1. Right click, View Source. 2. Awesome. I saw all the values in raw text. <INPUT TYPE="HIDDEN" NAME="s_id" VALUE="[usernName]"> <INPUT TYPE="HIDDEN" NAME="ControlSessionID" VALUE="[actualSID]"> <INPUT TYPE="HIDDEN" NAME="url" VALUE="http://[serverLocation]"> <INPUT TYPE="HIDDEN" NAME="RootName" VALUE="/"> <INPUT TYPE="HIDDEN" NAME="DataConn_ConnectionString" VALUE="Provider=[providerName];Data Source=[sourceName]"> <INPUT TYPE="HIDDEN" NAME="Library" VALUE="[libraryName]"> <INPUT TYPE="HIDDEN" NAME="DataConn_RuntimeUserName" VALUE="[userName]"> <INPUT TYPE="HIDDEN" NAME="DataConn_RuntimePassword" VALUE="[password]"> <INPUT TYPE="HIDDEN" NAME="Development_Mode" VALUE="N"> <INPUT TYPE="HIDDEN" NAME="ViewableLocations" VALUE="All"> <INPUT TYPE="HIDDEN" NAME="ViewableRegions" VALUE="All"> 1 comments
Project BBOM, Part 3? Wednesday, July 12, 2006 After the migration of my first project, I have become the owner of the mess, awesome. I'm trying to convince the manager to let me scrap it and rewrite it. I'm currently fixing a bug that has been there for...ever. Here's what I run into trying to find the source of the bug. [ASP Page] 805 lines; last updated in 2003! lol. [lines 105-112] If (isempty(postavailable)) then postavailable = "true" End if If (postavailable = "true") then postavailable = true Else postavailable = false End If [randomly spread through the code, more than 50 times] If (postavailable) then //set variable to a value, each time a different variable... Else //set a variable to " " End If 0 comments
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