Not sure if this question is trivial, but I'd like to know, is there some culture/convention saying one is better than the other? Or is there some hazard using one of them?
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`if a not in b`, it improves readability :) – thefourtheye Mar 03 '14 at 04:43
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@BrenBarn wow thx~ just don't know how to search it – zhangxaochen Mar 03 '14 at 04:46