go ahead... be a heretic | |
PerlMonks |
Re^2: Maintenance vs. Programming styleby BrowserUk (Patriarch) |
on Jan 29, 2008 at 12:41 UTC ( [id://664892]=note: print w/replies, xml ) | Need Help?? |
Bravo. I concur with every word. The only addition I would make is that if I have to fix or modify a piece of shared ownership/corporate code that is in a style radically different from my own preferred, then I will often go through the same "re-write and rename to my style" process in order to get to know that piece of code--on a private copy. Only once I am convinced that I understand what the code really does and it still passes any existing tests, will I attempt to fix or modify it. And once I have made and verified the changes, I'll go back to the original and attempt to re-make them, in the original style, minimizing the changed lines commensurate with doing the job right before check in. 80% (figure varies) of the life cost of a piece of code may be in the maintenance phase, but I've seen studies that put up to 50% of that 80% as backing out incorrectly fixed bugs; fixing introducd bugs; or the backing out of features added that broke existing code. Hit & run maintenance costs. And the two primary causes are: 1) 'simple' changes made to 'simple' code that turns out not to be; 2) changes made on the basis of out-of-date comments. I suspect, but have never seen proof, that a third cause is attempting to minimise changes for the sake of VCS change history stats. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
In Section
Meditations
|
|