After examining the Typescript code below, I'm curious to understand the rationale behind assigning myArray with (await asyncRPCCall())[0] instead of simply using await asyncRPCCall(). Why is the result placed inside () and why return only the first element? I'm interested in what sets this approach apart.
export class myClass {
static async myFunction(): Promise<void> {
const myArray: Array<Array<string>> = (await asyncRPCCall())[0]
console.log(myArray) // returns [['a','b','c','d'],['e','f','g','h']]
}
}