Principles of good Object oriented design
1 comments 2010-03-20

Recently I was reading books about Object Oriented design and analysis to refresh my designing skills. While doing that I came across few interesting design principles, I hope these will be helpful to new developers/designers
  1. Identify the aspects of your application that vary and separate them from whats stays the same.
  2. Program to an Interface, not an implementation.
  3. Favor composition over inheritance.
  4. Strive for loosely coupled designs between objects that interact.
  5. Classes should be open for extension, but closed for modification.
  6. Depend on abstractions. Do not depend on concrete class.
  7. Talk only to your Immediate friends - Principle of least knowledge.

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Posted byThinkFloyd
at12:39 PM

1 comments
 
Creating centered div layout in IE
0 comments 2010-03-04

These days many websites prefer to have fixed width body which is horizontally centered, and if you also want to create website like that, you would probably use "margin:auto;" style in your main container div inside body. This will work fine in most of the CSS2 and CSS3 compliant browsers(Firefox, Chrome) but in IE this page would not be centered!
Click here to see the Demo in IE.
You might be thinking "WTF is wrong with IE??".
Well there are many things which are wrong with IE, and this is just one of those.
Here is a workaround to fix this issue, use "text-align:center;" in BODY to align 'block' elements like "DIV". YUI also does the same in their reset css.
Click here to see the Demo with IE fix.
By now you must have noticed that we have to fix side effect of text-align when we use this approach, if you haven't noticed that in Demo, then again have a look at it.

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Posted byThinkFloyd
at3:38 PM

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