kdmadej

type Callback<T> = (newValue: T, oldValue: T) => void;

type SetDeleteResult<T> = ReturnType<Set<T>['delete']>

type CleanUp<T> = () => SetDeleteResult<T>;

export type UnwrappedObservable<T> = T extends Observable<infer R> ? R : never;

export interface Observable<T> {
  get(): T;

kdmadej

type DefaultSeparator = '_' | '-';

type CamelCase<S extends string, Separator extends string = DefaultSeparator, Beginning extends boolean = true>
  = S extends `${infer Character}${infer Rest}`
  ? Character extends Separator
    ? `${CamelCase<Capitalize<Rest>, Separator, Beginning>}`
    : `${Beginning extends true ? Lowercase<Character> : Character}${CamelCase<Rest, Separator, false>}`
  : '';

// Example: type T = "awaBbbCcc"