0

If I have a struct with many customer accounts:

bytes32[] public customerID;
mapping(bytes32 => CustomerAccounts) public customerAccounts;

struct CustomerAccounts{
   address customer;
   uint balance;
}

To delete a customer account in the struct, is it better to assign to a set of default values, like this:

CustomerAccounts memory blank;
customerAccounts[customerID] = blank;

or to use delete, as in this:

delete customerAccounts[customerID];

Or does not not really matter?

While the difference in gas is small, < 1000, I suspect in the former case, it may be still there in some ghostly form that could cause problems.

1

Better the second option, it's cleaner and more efficient. It sets all bytes of the struct to zero, and makes the code easier to maintain.

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