Amazing text first of all, a ++ to it and all other good suggestions around it
now my part of contribution
If you want to do some changes in order make your (huge in number of lines of code)script working(on which you recently faced some problems during extending code or adding new functionality), before incorporating the new change in the original script try to write a small script(probably a perl one liner) and check whether your that small logic will work in the small script, they try applying in the original script
I use this method if I want to include a regular expressions in to my existing scripts(huge in size), and it is assured that it works correctly provide I check it simple program or one liner.
Vivek
-- In accordance with the prarabdha of each, the One whose function it is to ordain makes each to act. What will not happen will never happen, whatever effort one may put forth. And what will happen will not fail to happen, however much one may seek to prevent it. This is certain. The part of wisdom therefore is to stay quiet.
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