One of the key things I think is that documentation is an opportunity for design. This is why I personally like to do documentation, then coding, then unit testing. But my unit tests are written to the docs, not the code.

If a module doesn't document well, it may not be very useful in a general use case. It may be full of hidden or oblique assumptions, and the author might not have a clear idea why the module is designed the way it is in the first place.

In reply to Re^4: The problem of documenting complex modules.(Summation.) by einhverfr
in thread The problem of documenting complex modules. by BrowserUk

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