thanks for your contribution,I get it! but actually if you try to understand my description well I am not saying one should use it to keep a codes for so long. but sometimes you might not really satisfied with the codes you have written and not sure if the other way you think will work or not then you can comment out the unsatisfied codes and start a new one. if new one worked then you can totally remove the old codes otherwise remove the new code and don't comment out the old code again.
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thanks for your contribution,I get it! but actually if you try to understand my description well I am not saying one should use it to keep a codes for so long. but sometimes you might not really satisfied with the codes you have written and not sure if the other way you think will work or not then you can comment out the unsatisfied codes and start a new one. if new one worked then you can totally remove the old codes otherwise remove the new code and don't comment out the old code again.