Difference between Nil and nil and Null in Objective-C
50081
When should I use nil and NULL in Objective-C?
120934
What is the difference between null=True and blank=True in Django?
122578
__NSArrayM insertObject:atIndex:]; object cannot be nil
24249
When is the Killing form null?
152780
what is the difference between null != object and object!=null
28291
What is the difference between these (bCondition == NULL) and (NULL==bCondition)?
71388
Use of * in Objective C Syntax
68676
Testing for nil in Objective-C -- if(x != nil) vs if(x)
5377
Is there a standard function to check for null, undefined, or blank variables in JavaScript?
64884
Why `null >= 0 && null <= 0` but not `null == 0`?
110721
Nullable types and the ternary operator: why is `? 10 : null` forbidden?
140738
Does setting Java objects to null do anything anymore?
15097
Is there any difference between IS NULL and =NULL
32059
What is \null and when do we need to use it?
38241
How do I check for nulls in an '==' operator overload without infinite recursion?
101146
Why can't I write Nullable>?
138823
Why cast null to Object?