ackvf

/* Type guards */

export function assertType<T>(obj: any, assertion: (obj: T) => boolean): asserts obj is T {
  if (!assertion(obj)) throw new Error('Invalid type')
}

export function is<T>(obj: any, assertion: (obj: T) => boolean): obj is T {
  return assertion(obj);
}

ackvf

// Class-based Tree Shaking - HTTP203 @ Google Chrome Developers
// https://www.youtube.com/watch?v=lsd2-TCgHEs&t=599

class Store {
  /**
   * Do the given action with the given parameters.
   *
   * @param {A => R} action Action to be taken.
   * @param {A} args Arguments to be passed to the action.
   * @returns {R} Returns the result of original action call.