null Archives - Page 4 of 6

What is the difference between NULL, ‘\0’ and 0?

In C, there appear to be differences between various values of zero — NULL, NUL and 0. I know that the ASCII character ...

May 11, 2022
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In C#, what happens when you call an extension method on a null object?

Does the method get called with a null value or does it give a null reference exception? MyObject myObject = null; myObject.MyExtensionMethod(); // ...

May 10, 2022
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What is the difference between “x is null” and “x == null”?

In C# 7, we can use if (x is null) return; instead of if (x == null) return; Are there any advantages to ...

May 5, 2022
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What is the difference between Nullable.HasValue or Nullable != null?

I always used Nullable<>.HasValue because I liked the semantics. However, recently I was working on someone else’s existing codebase where they used Nullable<> ...

May 4, 2022
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return, return None, and no return at all?

Consider three functions: def my_func1(): print "Hello World" return None def my_func2(): print "Hello World" return def my_func3(): print "Hello World" They all ...

May 3, 2022
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How can I check if a string is null or empty in PowerShell?

Is there a built-in IsNullOrEmpty-like function in order to check if a string is null or empty, in PowerShell? I could not find ...

May 3, 2022
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Should a retrieval method return ‘null’ or throw an exception when it can’t produce the return value? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 2, 2022
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How to filter empty or NULL names in a QuerySet?

I have first_name, last_name & alias (optional) which I need to search for. So, I need a query to give me all the ...

May 1, 2022
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Representing null in JSON

What is the preferred method for returning null values in JSON? Is there a different preference for primitives? For example, if my object ...

May 1, 2022
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IllegalArgumentException or NullPointerException for a null parameter? [closed]

Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be ...

May 1, 2022
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