Edmund Kirwan

About Edmund Kirwan

Edmund is a programmer with a telecoms company in Stockholm where he is currently working on a large-scale network simulator. In his spare time he thinks far too much about program-structure.

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What’s the opposite of duplication?

“If you see the same code structure in more than one place,” writes Martin Fowler in his wonderful, Refactoring book, “You can be sure that your program will be better ...
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Dependency inversion: the structure logarithm

Re-examining benefits. Through the corroded dripping pipes of transitive dependencies, ripple effects gush. Programmers sometimes spend arduous days clambering down into the darkened ...
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How many classes and packages should you have?

Real world experience. Once upon a time there lived a family of programming bears. Each morning mammy bear, daddy bear and baby bear would rise and eat breakfast together in their secluded ...
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Going Dawkins on god objects

Meet the enemy. Steaming stinking jungle crushing all about you, insects infesting the air, strange grunts shuddering in the foliage, you pause deep in uncharted refactoring, far from ...
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How deep is your code?

Dependency tuples. Picture your code. Picture all those functions on which there are no source-code dependencies. That might sound odd: if there are no source-code dependencies on a ...
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The three greatest paragraphs ever written on encapsulation

Definition. Encapsulation isn’t sexy. It’s the chartered accounting of software design. Functional Java programming? Formula freakin’ one. Hybrid cloud computing? ...
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