I noticed this difference between the sortBy and uniqBy (and maybe other functions)
where the sortBy takes an array and either a list op properties or a list of mapper functions
But uniqBy only takes a mapper function

Is there a reason for this?

Or could we extend the uniqBy api to:

uniqBy(T[], keyof T | (item: T) => U)

• items: same as before
• second argument:
  • either a property name string
  • or a mapper function that returns the value to check for uniqueness

In my code this would quite often make it easier to read since i wouldn't always need a mapper arrow function.