Removing partial duplicates from an array

Question

-bit of a noobie question, but I have an array that looks like this:

[["john",13],
["jack",12],
["judy",14],
["john",18]]

In the event there is a duplicate name, I would like to remove the element with the highest score, such that it looks like this:

[["john",13],
["jack",12],
["judy",14]]

Standard method of removing duplicates don't work in this case and I am just wondering if anyone knows how this could be done?

Thanks in advance,

Answer 1

You could use reduce method and Map to get unique values and then you can use spread syntax to get array of arrays.

const data = [["john",13], ["jack",12], ["judy",14], ["john",18]]

const result = data.reduce((r, [k, v]) => {
  if(!r.get(k) || v < r.get(k)) r.set(k, v)
  return r;
}, new Map)

console.log([...result])