! vs == nil in objective-c
68676
Testing for nil in Objective-C -- if(x != nil) vs if(x)
43413
Ruby: String Comparison Issues
126009
Why is `a = a` `nil` in Ruby?
30170
Difference between _ and self. in Objective-C
81141
What does @"some string" mean in objective-c?
69595
Comparing NSNumbers in Objective C
1469
Is there a difference between "==" and "is"?
17078
if(false==condition). Why?
126994
Does an int in Objective-C have a default value of 1?
133619
In Objective-C why should I check if self = [super init] is not nil?
46477
How to understand nil vs. empty vs. blank in Ruby
103299
What's "<?=" operator in C++?
33398
C# difference between == and Equals()
147409
String.equals versus ==
105179
Do you prefer "if (var)" or "if (var != 0)"?
154567
difference between null != something and something != null
12323
iPhone : Difference between nil vs Nil and true vs TRUE