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by nine_k
989 days ago
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Yes, composing self-contained parts is mere multiplication: if you have two sequentially connected components with m and n states, the composition has no more than m × n states (in practice much fewer). But if you have two tightly coupled components which can arbitrarily jump into each other's code, you have (m + n)^2 states. A four-stage Unix pipe is easy to split and thus analyze and understand, step by step, because each step is reasonably small, and has only one input and one output (presumably). Spaghetti code may be impenetrable, and only work by coincidence. |
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