ES2020 introduced the nullish coalescing operator (??) which returns the right operand if the left operand is null or undefined. This functionality is similar to the logical OR operator (||). For e...

Is it possible to make a search by querySelectorAll() using multiple unrelated conditions? If yes, how? And, how to specify whether those are AND or OR criteria? For example: How to find all forms,...

It seems that Django's object model filter method automatically uses the AND SQL keyword. For example: >>> Publisher.objects.filter(name__contains="press", country__contains=&quo...

Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see in use more frequently. Previously most JavaScript code used ||. let userAge...

When I do TypeScript: let token = req.headers['x-access-token'] || req.headers['authorization'] as string; I have the following error: Argument of type 'string | string[]' is not assignable to par...

In pure Python, None or True returns True. However with pandas when I'm doing a | between two Series containing None values, results are not as I expected: >>> df.to_dict() {'buybox': {0: ...

I ran into a case where I have run both functions in a JavaScript or expression: function first(){ console.log("First function"); return true; }; function second(){ console.log("Second f...

Consider the following: (EDIT: I've amended the function slightly to remove the use or braces with the ternary operator) function someFunction(start,end,step){ var start = start || 1, end = end ...

I can't understand output of this program: #include<iostream> using namespace std; int main() { int x = 1 , y = 1, z = 1; cout << ( ++x || ++y && ++z ) << endl; /...

Look at this tiny snippet. y<v|!v?:y=v; (y is minimum value, and v is current compared value. This way would make you think easier.) This snippet’s meaning is simple. If current value v is ...

In Java (Eclipse), when having a statement such as if (true || false), it will end up true but the question is will the compiler evaluate the second statement if the first is true? This is of...

As the title describes, what's the proper way to do an or-assignment (eg a= b || c) in shell scripting, specifically csh vs bash? I cannot test this, so perhaps the example above works. I thought...

I know that || represents the logical operation "or", but I'm curious if anyone knows the history of choosing that symbol. Was it just because it happened to be an unused symbol on the keyboa...