done

Ah I navigated away too quickly. Please check now.

i dont think you did - it is still not shown as pending / approvable

Sorry, new here - just published it!

it looks like this fork is not published

Note for anyone looking at this, I should have used a strongly-typed comparator:

export const friend = (friends: string[]): string[] => friends.filter((friend: string): boolean => friend.length === 4);

This is nitpicky, but for TypeScript, a function signature of the following would make more sense:

public static gap = (g: number, m: number, n: number): [number, number] | null => {

This appropriately enforces the tuple being returned, as opposed to a number[] type that won't have element count enforced.

Edit: Here's a fork.