Could someone provide an instance of an object that matches the TypeScript type below? I'm a bit confused because I've only worked with interfaces before and have only seen square brackets.
type Hash = {
(data: Uint8Array): Uint8Array
blockLen: number
outputLen: number
create: any
}
Appreciate it!
This represents a call signature. Essentially, it signifies that a Hash not only possesses properties like blockLen, outputLen, and create, but it can also be invoked as a function taking a parameter of type Uint8Array and returning a value of type Uint8Array:
const hash: Hash = function (x) { return x };
hash.blockLen = 1;
hash.outputLen = 2;
hash.create = "who knows";
const hashed = hash(new Uint8Array([1,2,3]));
// const hashed: Uint8Array
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