For example, I wrote a function for others to use
But when he used it, he forgot to pass it on
This is not what I expected.
So what should I do?
1. Document agreement. The contract must pass the correct parameters.
I am here
scanInside threw it wrong.
3. Fault tolerant, even if he didn’t pass the entry, I will try my best to keep the program from making mistakes.
It’s very complicated. Which is the best plan?
The following details will be described again:
reqThat is, http request, if this parameter is not passed, then
scanIt doesn’t make any sense, so how should it be handled properly?
It depends on the requirements of this function.
-If this function can set default parameters, such as the default current time of creation time, this is of course the best.
-If you must pass in parameters, such as opening a file, if you set a default value to open an address that the client does not know, serious errors will occur instead. At this time, there are two methods: if there is only one error and the function has a return value, null； can be returned; If the function is void or the client needs to distinguish between different types, then different types of exceptions should be thrown.