8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
400 B
400 B
nthArg
Creates a function that gets the argument at index n. If n is negative, the nth argument from the end is returned.
Use Array.prototype.slice() to get the desired argument at index n.
const nthArg = n => (...args) => args.slice(n)[0];
const third = nthArg(2);
third(1, 2, 3); // 3
third(1, 2); // undefined
const last = nthArg(-1);
last(1, 2, 3, 4, 5); // 5