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Bottom-up code design is not better than top-down code design. Scrum, Agile, and Extreme Programming cultivate and promote bottom-up code design. When there is lack of big picture design documentation, the tendency is to implement one thing at a time, and then modify and tweak according to customer's feedback.
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A good out of the box library or class I could use as a singleton to manage database interactions in one of my PHP projects.
links for 2009-01-14
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