Maybe people should become familiar with Grug: https://grugbrain.dev/

I'll take the t-rex.

> apex predator of grug is complexity. complexity bad. say again: complexity very bad. you say now: complexity very, very bad. given choice between complexity or one on one against t-rex, grug take t-rex: at least grug see t-rex

    // in some util.ts or helpers.ts
    export function keysOf<T extends string>(obj: { [k in T]: unknown }): readonly T[] {
       return Object.keys(obj) as unknown[] as T[];
    }

    //---

    const kOperationsFunctions = {
       add(a: number, b: number) { return a + b; },
       subtract(a: number, b: number) { return a - b; },
       multiply(a: number, b: number) { return a * b; },
       divide(a: number, b: number) { return a / b; },
    };
    const kOperations = keysOf(kOperationsFunctions);
    type Operation = (typeof kOperations)[number];