I recently acquired some knowledge about TypeScript through a university course I took this month.
Is it possible for this to represent an empty set?
type emptySet=0&1;
Whenever I attempt to assign this to any value (for example: boolean, number, string), I encounter a type error.
I am uncertain about the meaning of 0&1 in TypeScript. In other programming languages, it typically indicates "false" or a bitwise operation.
It appears that you may be aiming for the concept of an "empty set," which is represented by an array with no elements.
type EmptySet = void[];
const empty: EmptySet = []; // This is considered valid
const notEmpty: EmptySet = [1,2,3]; // However, this would not be considered valid
The void type represents a function that does not return a value.
type emptyFunction = void;
let ef: emptyFunction = undefined;
There is another type called never which signifies a value that never occurs.
type nothingness = never;
let n: nothingness = undefined; // Compilation error
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