I have this function:
const randomFromArray = (array: unknown[]) => {
return array[randomNumberFromRange(0, array.length - 1)];
};
My question is how can I dynamically type this input instead of using unknown or any. When I call this function, it understandably returns a type of unknown but I'd like for it to return the type that it was called with.
i.e. The returned type from randomFromArray(['red', 'blue']), would be string and the returned type from randomFromArray([1, 2]), would be number
CodePudding user response：
Use a generic parameter:
const randomFromArray = <T>(array: T[]): T => {
return array[randomNumberFromRange(0, array.length - 1)];
};