Let’s assume there is a object definition:

Let’s assume there is a object definition:

I’m currently using Typescript to strongly-type names and values for feature flags in our application. eg:

so i’m trying to write a component that renders all the fields in an object, however the object can be various types.

With reference to my code below, I am trying to create a Map<string, Function> (eventHandlerMap in the code below) such that each of its keys is a string from (PortalEvent in the code below) Union type. The value of each property should be a function that must return an object of specific type (in this example one of UserComment or Author).

I have a number of classes that I’ll need to create instances of based on a string. Each class has a model that needs to be passed in their constructor and they are all different (some similar properties, but we’ll keep it simple).

I have the following KeyMapper type that I need to fix:

I have a function that takes as parameters a method name as a string and the object that contains that method. I can easily check that the class of the object contains the method name. But I also want to make sure that it is callable and the return type is of a certain type. How can I do that?

I have a sanitizer that may or may not receive a set of possible values. If it receives, it should enforce those to be the only possible values, if not, it should just check if it is string type, and if any of the checks failed, I want to return defaultValue. My code so far is the following:

I am trying to create a version of Array.groupBy() that handles more cases.
Specifically, I want to be able to store a single object for a given key (instead of an array of objects with Array.groupBy()) or pluck a single property from each object.