Where to check for null in a call method or function?

Question

If you need to check null before calling the function or inside the function itself?

Answer 1

I would say in the call itself. Thus, you only check for zero in one place, not 5 places, if you call this function from 5 different points.

But this is not the right answer. It really depends on the function and what consequences it causes with a null argument.

Answer 2

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Answer 3

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Answer 4

null , null . DRY, null ( ryeguy).

null , ( ) ( - NullPointerException ).

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