09 dezembro 2007

Triste Realidade

Infelizmente é comum encontrarmos projetos em que não houve a menor preocupação com qualidade... seja qualidade na resolução do problema que um código se propõe, seja na qualidade do código produzido.
Lendo um texto clássico, How to Write Unmaintainable Code, percebe-se o quanto é importante a preocupação com a forma que produzimos software.
"Any fool can write a code that a machine understands. Good programmers can write code that a human can understand"

Pense nisso... em desenvolvimento de software, código legal está entre os principais motivos para atrasos no desenvolvimento.

Continue a leitura do artigo, e caso encontre similaridades na forma com que seu código fonte está organizado repense sua forma de trabalho. Coloquei apenas a introdução do texto, mas vale a pena checar o artigo completo.


Never ascribe to malice, that which can be explained by incompetence.


Because of the Slashdot plug, hits peaked at 250 a second on this page, and the hit counters stopped kicking over. I received a slew of email with suggestions for ever more subtle techniques of writing unmaintainable code. It took me quite while for me to incorporate all your suggestions. The essay has been like rock candy, seed the string with sugar, soak in sugar water, soon it grew out of control.

In the interests of creating employment opportunities in the Java programming field, I am passing on these tips from the masters on how to write code that is so difficult to maintain, that the people who come after you will take years to make even the simplest changes. Further, if you follow all these rules religiously, you will even guarantee yourself a lifetime of employment, since no one but you has a hope in hell of maintaining the code. Then again, if you followed all these rules religiously, even you wouldn't be able to maintain the code!
General Principles

Quidquid latine dictum sit, altum viditur.
Whatever is said in Latin sounds profound.

To foil the maintenance programmer, you have to understand how he thinks. He has your giant program. He has no time to read it all, much less understand it. He wants to rapidly find the place to make his change, make it and get out and have no unexpected side effects from the change.

He views your code through a tube taken from the centre of a roll of toilet paper. He can only see a tiny piece of your program at a time. You want to make sure he can never get at the big picture from doing that. You want to make it as hard as possible for him to find the code he is looking for. But even more important, you want to make it as awkward as possible for him to safely ignore anything.

Programmers are lulled into complacency by conventions. By every once in a while subtly violating convention you force him to read every line of your code with a magnifying glass.

You might get the idea that every language feature makes code unmaintainable -- not so, only if properly misused.

Um comentário:

  1. Errata: "código Legado" na frase:

    Pense nisso... em desenvolvimento de software, código legado está entre os principais motivos para atrasos no desenvolvimento.