30-seconds-of-code/javascript/snippets/ary.md

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Function arity	snippet	function	trippy-chemicals	2020-10-18T20:24:28+03:00

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.prototype.slice() and the spread operator (...).

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

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