Top "Not-operator" questions

A unary Boolean operator that negates its operand.

What does "!--" do in JavaScript?

I have this piece of code (taken from this question): var walk = function(dir, done) { var results = []; fs.readdir(dir, …

javascript decrement prefix-operator not-operator
Which is clearer form: if(!value) or if(flag == value)?

I understand this is a subjective question, so I apologize if it needs to be closed, but I feel like …

c# not-operator
!flag has two meanings in java?

boolean flag = false; if(!flag) System.out.println(!flag); // prints true I wonder why !flag being considered as false when …

java if-statement not-operator
Python not equal operator

I come from a c style languages, so I am natural in using != as not equal, but when I came …

python deprecated not-operator
MySQL - NOT IN LIKE

How can I, in mysql, check if a value is inside a number of fields in another table? Something like …

mysql sql-like in-operator not-operator