What is <> meaning...? when we use map <> always is found

Question

What is <>meaning? if-state and functions uses {}

I can't understand following code... Anyone make it simple so please tell me about that. Is <> possible to be used as an argument?

const AAA = <K,V> => ( keyMapper: (i: KI) => KO, ...inputs: Map<KI, V>[] ): Map<Key, V[]> => {}

Generics: https://www.typescriptlang.org/docs/handbook/generics.html — Willem Van Onsem, Dec 15 '19 at 13:08
Type parameters for generics. See https://www.typescriptlang.org/docs/handbook/generics.html — CertainPerformance, Dec 15 '19 at 13:08

score 1 · Answer 1 · answered Dec 15 '19 at 13:09

Map is a generic, therefore you specify the types it will use in the angle brackets. Map<number, string> for example, means a map with numeric keys and string values.
You can read more about generics here: https://www.typescriptlang.org/docs/handbook/generics.html

What is <> meaning...? when we use map <> always is found

1 Answers1