NULL macro or NULL const
69607
Do you use NULL or 0 (zero) for pointers in C++?
35796
Difference between 2>&-, 2>/dev/null, |&, &>/dev/null and >/dev/null 2>&1
71139
What is the difference between if(CONST==variable) or if(variable==CONST)?
22361
String concatenation with Null
124080
How does the assignment of the null literal to a System.Nullable type get handled by .Net (C#)?
48456
Explanation of C++ FAQ's unsafe macro?
18128
"static const" vs "#define" vs "enum"
138823
Why cast null to Object?
114816
Is null reference possible?
27219
Is there any difference between type? and Nullable?
127005
' ... != null' or 'null != ....' best performance?
38241
How do I check for nulls in an '==' operator overload without infinite recursion?
151469
What is the difference between null and System.DBNull.Value?
48235
Setting Objects to Null/Nothing after use in .NET
29684
How to check if an object is nullable?
62074
Which is more effective: if (null == variable) or if (variable == null)?
153624
What's the difference between is_null($var) and ($var === null)?