When to return NULL or an empty object?
Returning null is usually the best idea if you intend to indicate that no data is available. An empty object implies data has been returned, whereas returning null clearly indicates that nothing has been returned.
What’s the difference between getbytecount and getbytes?
Remarks. The GetByteCount method determines how many bytes result in encoding a set of Unicode characters, and the GetBytes method performs the actual encoding. The GetBytes method expects discrete conversions, in contrast to the Encoder.GetBytes method, which handles multiple conversions on a single input stream.
Is it possible for a variable to be null?
However, since a variable can contain null, you may run into a runtime error by invoking a message on null, which will get you a nice, friendly stack trace. If it’s possible for a variable to be null, you have to remember to surround it with null test code so you’ll do the right thing if a null is present.
Is it possible to run a stack trace on null?
With a strongly typed language you can even have the compiler check that the call is correct. However, since a variable can contain null, you may run into a runtime error by invoking a message on null, which will get you a nice, friendly stack trace.
How to return an empty list in Stack Overflow?
It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 3 years ago. I am trying to call a function that will empty two lists that i send as arguments.
Why does Python not check if a list is empty?
Other methods that work fine for lists or other standard containers fail for numpy arrays. This way fails with numpy arrays because numpy tries to cast the array to an array of bools and if this tries to evaluate all of those bools at once for some kind of aggregate truth value, it fails so we get a ValueError.
Is it bad to return a list as a refernce?
Passing a list as a refernce, and returning a boolean value from the function, it is a bad idea. Your method called getEmailAttachments, it’s load attachments, and it should return attachments. If you want to check the result of loading attachments, i can suggest you return null and check the returned value. If someone still looking… try this..