(cell == nil) vs (!cell)
68676
Testing for nil in Objective-C -- if(x != nil) vs if(x)
154049
why does if("string") evaluate "string" as true but if ("string"==true) does not?
98704
Is There a Better Way of Checking Nil or Length == 0 of a String in Ruby?
128255
Empty Strings: Why or when is '' equal to ' '?
91433
Is there a difference between :: and . when calling class methods in Ruby?
144910
Inadvertent use of = instead of ==
12323
iPhone : Difference between nil vs Nil and true vs TRUE
158810
Why does >= return false when == returns true for null values?
147409
String.equals versus ==
113354
Ruby |= assignment operator
150558
Lua operators, why isn't +=, -= and so on defined?
71607
What's this =! operator?
50187
Which "if" construct is faster - statement or ternary operator?
50416
What does the >?= operator mean?
151825
Is there any difference between "foo is None" and "foo == None"?
1469
Is there a difference between "==" and "is"?
102641
ObjectiveC: if (obj) {...} AND if (obj != nil) {...}, which is better?