Creates a function that accepts up to?n?arguments, ignoring any additional arguments.
Call the provided function,?fn, with up to?n?arguments, using?Array.slice(0,n)?and the spread operator (...).

constary = (fn, n) => (...args) => fn(...args.slice(0, n));

Usage:

constfirstTwoMax = ary(Math.max,2);
[[2,6,'a'], [8,4,6], [10]].map(x => firstTwoMax(...x));????????// [6, 8, 10]

From:

https://github.com/Chalarangelo/30-seconds-of-code
https://30secondsofcode.org/