30-seconds-of-code/snippets/js/s/compact-join-array.md

title, type, language, tags, author, cover, dateModified

title	type	language	tags	author	cover	dateModified
Compact and join array	snippet	javascript	array	chalarangelo	racoon	2022-04-08T05:00:00-04:00

Removes falsy values from an array and combines the remaining values into a string.

• Use Array.prototype.filter() to filter out falsy values (false, null, 0, "", undefined, and NaN).
• Use Array.prototype.join() to join the remaining values into a string.

const compactJoin = (arr, delim = ',') => arr.filter(Boolean).join(delim);

compactJoin(['a', '', 'b', 'c']); // 'a,b,c'