Top "Negation" questions

Negation is the logic operation that inverses a value, also seen as a NOT operation.

Negation in Python

I'm trying to create a directory if the path doesn't exist, but the ! (not) operator doesn't work. I'm not sure …

python negation
How to filter an array of objects based on values in an inner array with jq?

Given this input: [ { "Id": "cb94e7a42732b598ad18a8f27454a886c1aa8bbba6167646d8f064cd86191e2b", "…

arrays json select jq negation
String negation using regular expressions

Is it possible to do string negation in regular expressions? I need to match all strings that do not contain …

regex lookahead negative-lookahead negation
Including bean definition when a profile is NOT active

In my application I use several profiles to make certain beans eligible for autowiring. What I'm missing is the possibility …

java spring spring-profiles negation
Negative form of isinstance() in Python

How would I use a negative form of Python's isinstance()? Normally negation would work something like x != 1 if x not …

python negate negation isinstance
Can I use the not operator in C++ on int values?

Strange question, but someone showed me this, I was wondering can you use the not ! operator for int in C++? (…

c++ int logical-operators negation
Negation of %in% in R

Is there a short negation of %in% in R like !%in% or %!in%? Of course I can negate c("A", "…

r match negation
Exclamation mark in front of variable - clarification needed

I've been working with PHP for quite a while now, but this was always a mystery to me, the correct …

php variables if-statement boolean-expression negation
how to pass a not like operator in a sqlalchemy ORM query

I've got a query: MyModel.query.filter(Mymodel.name.contains('a_string')) I need to do the same query but …

orm sqlalchemy negation
Prolog implying a negative predicate

How can I write the following rule in PROLOG: if P then not Q I understand that you can easily …

prolog negation