Object oriented Is it better to return NULL or empty values from
If it was designed to return a collection e g findAllOldPeople then an empty collection is best A corollary of this is that a function which returns a collection should never return null In addition make sure that you document the fact that the function can return null If you follow these rules nulls are mostly harmless
Is it better to return undefined or null from a javascript function , If the answer is yes then use null else use undefined More generally any function returning an object should return null when the intended object does not exist Because it could exist given another input state context null represents the absence of value for a given input state context
3 Clever Ways to Return Empty Value Instead of Null From a Method
When you deal with the scenario of not being able to return a specific value you will have to return either an empty or null value based on the functionality of your method For example refer to the following simple method var product db Products GetData k k ProductId id return product
A quick and thorough guide to null what it is and how you should , When to Use null And When Not to Use It The basic rule is simple null should only be allowed when it makes sense for an object reference to have no value associated with it Note an object reference can be a variable constant property class field input output argument and so on
Return null or Throw Exception Best Practice Chris Shennan
Return null or Throw Exception Best Practice Chris Shennan, We could return null if either value is empty but if we re not careful with the next bit of code that null could be interpreted as a 0 which could result in completely incorrect values in further calculations The following is an overly simplistic example where I am attempting to get a LineItem total value I ve stripped out the logic that
Solved Return New EmptyResult VS Return NULL 9to5Answer
Just Don t Return null Medium
Just Don t Return null Medium The method uses the Item return type this means something needs to be returned even if the item is not available It s very tempting to just return a null reference but this could cause
Return YouTube
Note This is a follow up article to a previous article with the title Why We Should Love null While the previous article focused on the general case of returning null from a function this article is about the more special case of functions that return a list In this article I am going to refer sometimes to the Why We Should Love null article so you might want to read that article Is it Really Better to Return an Empty List Instead of null Part 1. Returning null from non async Task returning methods returns a null Task which is almost never what a caller wants and invites NREs Instead ensure that all Task returning methods return a Task you can use Task FromResult null in place of null We don t have to worry about manually creating a Task when we mark a method as async The compiler transforms async methods into a state machine Return NULL returns the value NULL and the return type of the function it s found in must be compatible with NULL I understand that in C return NULL is the same as return 0 in the context of pointers Sort of NULL may not be equivalent to 0 but it will at least convert to something that is Obviously for integers this is not the case
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