Typescript not happy with the advice from README

[ccoffey]

Trying to take this advice in the README: https://github.com/mourner/flatqueue#using-typed-arrays

But Typescript is not happy:

I am using flatqueue v2.0.3.

What am I doing wrong here?

[JannikGM]

You'll probably have to // @ts-ignore it, because those 2 fields are implementation details which don't show in the TypeScript typings.

They are initialized here:

flatqueue/index.js

Lines 4 to 8 in a373847

	constructor() {
	this.ids = [];
	this.values = [];
	this.length = 0;
	}

But they don't exist in the typings:

flatqueue/index.d.ts

Lines 1 to 7 in a373847

	export default class FlatQueue<T> {
	/**
	* Number of items in the queue.
	*/
	readonly length: number;
	constructor();

---

I think flatqueue should potentially have a constructor where you can optionally pass those arrays (with documented requirements for the implementation), or it should expose these fields in the typings (however, that violates the black-box principle and might lead to stupid bugs).
There might be other good design alternatives too.

Until that works, it's probably easiest to use ts-ignore and / or wrap the flatqueue constructor/class in a utility function/class.

[ccoffey]

Thank you for the reply, this makes a lot of sense.