IOS Swift, difference between someString! vs someString?
62586
Swift variable decorations with "?" (question mark) and "!" (exclamation mark)
155983
What do the plus and minus signs mean in Objective-C next to a method?
32293
What's the difference between if(!$variable) and if(isset($variable))?
111006
Is this ternary conditional ?: correct (Objective) C syntax?
33772
Is there any difference in equals and == for String variables?
79050
Python ( or general programming ). Why use  instead of != and are there risks?
138518
Why is one string greater than the other when comparing strings in JavaScript?
32886
What is the difference between != and =! in Java?
23756
Why does one often see "null != variable" instead of "variable != null" in C#?
40710
Asterisk in parenthesis in Objective-C... What does it mean?
133619
In Objective-C why should I check if self = [super init] is not nil?
41101
Difference between properties and variables in iOS header file?
140931
What is the difference between if(!!condition) and if(condition)
46395
Is it 100% correct to replace !!someVar with Boolean(someVar)?
30632
When should I use Strong vs Weak for IBOutlets (further clarification)
107457
Difference between viewDidAppear, viewDidLoad in iPhone/iOS?
56535
In C#, should I use string.Empty or String.Empty or "" to intitialize a string?