Top "Logical-or" questions

Why is "||" the symbol for or?

I know that || represents the logical operation "or", but I'm curious if anyone knows the history of choosing that symbol. …

syntax operators history bitwise-or logical-or

When should I use ?? (nullish coalescing) vs || (logical OR)?

Related to Is there a "null coalescing" operator in JavaScript? - JavaScript now has a ?? operator which I see is …

javascript logical-or

Does logical or ignores second statement if first is true

In Java (Eclipse), when having a statement such as if (true || false), it will end up true but the question …

java eclipse logical-or

Typescripts type 'string | string[]' is not assignable to type 'string', what is the 'string | string[]' type? how to cast them to string?

When I do TypeScript: let token = req.headers['x-access-token'] || req.headers['authorization'] as string; I have fellow error: Argument of …

string typescript logical-or