CSC/ECE 517 Fall 2009/wiki3 4 br: Difference between revisions

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Topic: DRY principle for data
Topic: DRY principle for data
Most of the literature on the DRY principle relates to code. But the principle also applies to data. Survey the issues related to copying the same data, and give reasons (e.g., caching) why it might sometimes be desirable, and how one should decide where it is helpful not to follow this general rule.
Most of the literature on the DRY principle relates to code. But the principle also applies to data. Survey the issues related to copying the same data, and give reasons (e.g., caching) why it might sometimes be desirable, and how one should decide where it is helpful not to follow this general rule.
[http://en.wikipedia.org/wiki/DRY ''DRY'' 3] (or Don't Repeat Yourself) describes ...
== '''DRY principle for data''' ==
__TOC__
=='''An overview of the concepts'''==
==='''Don't Repeat Yourself'''===
[[Image:DRY.jpg]]
==='''DRY principle - related to code'''===
:*'''''Example''': DRY
  class Person
    attr_accessor :name
  end
==='''DRY principle - related to data'''===
===='''DRY principle - bad when used with data'''====
===='''DRY principle - good when used with data'''====
=='''Conclusion'''==
=='''References'''==
'''
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Revision as of 01:26, 9 November 2009

Topic: DRY principle for data Most of the literature on the DRY principle relates to code. But the principle also applies to data. Survey the issues related to copying the same data, and give reasons (e.g., caching) why it might sometimes be desirable, and how one should decide where it is helpful not to follow this general rule.


DRY 3 (or Don't Repeat Yourself) describes ...

DRY principle for data

An overview of the concepts

Don't Repeat Yourself

File:DRY.jpg


DRY principle - related to code

  • Example: DRY 
 class Person
   attr_accessor :name
 end

DRY principle - related to data

DRY principle - bad when used with data

DRY principle - good when used with data

Conclusion

References

1.

2.

3.

4.

5.

6.

7.

8.

9.

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