I've heard it said that the inclusion of null references in programming languages is the "billion dollar mistake". But why? Sure, they can cause NullReferenceExceptions, but so what? Any element of ...
Attribution: This grew out of a related P.SE question My background is in C / C++, but I have worked a fair amount in Java and am currently coding C#. Because of my C background, checking passed and ...
Last week, we had a heated argument about handling nulls in our application's service layer. The question is in the .NET context, but it will be the same in Java and many other technologies. The ...
Summary: Should a function in C always check to make sure it is not dereferencing a NULL pointer? If not when is it appropriate to skip these checks? Details: I've been reading some books about ...
I'm sure designers of languages like Java or C# knew issues related to existence of null references (see Are null references really a bad thing?). Also implementing an option type isn't really much ...
Working on a problem that uses the percent change formula: percent change = 100 * [(new value - old value) / old value] How would I explain the difference if new value or old value = NULL, rather ...
I have been learning C++ and I am having a hard time understanding null. In particular, the tutorials I have read mention doing a "null check", but I am not sure what that means or why it's necessary. ...
I have some code that is failing because of NullPointerException. A method is being called on the object where the object does not exist. However, this led me to think about the best way to fix ...
I have been having a little bit of a debate with a coworker lately. We are specifically using C#, but this could apply to any language with nullable types. Say for example you have a value that ...
I don't quite understand the consistent bashing of null references by some programming language folks. What's so bad about them? If I request read access to a file that doesn't exist then I'm ...
So I'm working on a software product where we have a number of fields that the customer can leave blank, some of which are numeric. To persist these in the database we use nullable columns. Easy ...