Checking for string contents? string Length Vs Empty String

Question

Which is more efficient for the compiler and the best practice for checking whether a string is blank?

1. Checking whether the length of the string == 0

Answer 1

Again, without knowing the language, it's impossible to tell.

However, I recommend that you choose the technique that makes the most sense to the maintenance programmer that follows and will have to maintain your work.

I'd recommend writing a function that explicitly does what you want, such as

#define IS_EMPTY(s) ((s)[0]==0)

or comparable. Now there's no doubt at is you're checking.