query: Which has better performance: test != null or null != test
positive_passages.docid: 2146
positive_passages.text: object==null or null==object?
negative_passages.docid: 50081
negative_passages.text: When should I use nil and NULL in Objective-C?
negative_passages.docid: 38716
negative_passages.text: Is there a difference between “?!” and “!?”?
negative_passages.docid: 56572
negative_passages.text: Which method performs better: .Any() vs .Count() > 0?
negative_passages.docid: 79050
negative_passages.text: Python ( or general programming ). Why use  instead of != and are there risks?
negative_passages.docid: 76808
negative_passages.text: Meaning of ! in Java syntax
negative_passages.docid: 158391
negative_passages.text: Most efficient way to check for DBNull and then assign to a variable?
negative_passages.docid: 97398
negative_passages.text: Is < faster than <=?
negative_passages.docid: 31537
negative_passages.text: Checking for null before event dispatching... thread safe?
negative_passages.docid: 64884
negative_passages.text: Why `null >= 0 && null <= 0` but not `null == 0`?
negative_passages.docid: 104880
negative_passages.text: Is the ternary operator faster than an "if" condition in Java
negative_passages.docid: 56535
negative_passages.text: In C#, should I use string.Empty or String.Empty or "" to intitialize a string?
negative_passages.docid: 144361
negative_passages.text: string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
negative_passages.docid: 105179
negative_passages.text: Do you prefer "if (var)" or "if (var != 0)"?
negative_passages.docid: 97291
negative_passages.text: if(!x) vs if(x==false) in ruby
negative_passages.docid: 15469
negative_passages.text: Difference between ! vs !! vs * in /etc/shadow
negative_passages.docid: 641
negative_passages.text: Which overload will get selected for null in Java?