web-dev-ts-useful-snippets

How to define params of callback function?

export class OurClass {
    onClickCallback: (array: SuperArray[][], columnIndex: number, index: number) => OptionClickResult | null;

    constructor(public first: string) {
    }
}

TS types

private dictinary: { [key: number]: MyModel } = {};

const dictinary = {
    1: "First",
    2: "Second"
};