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

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Argument coalescing	snippet	type	flower-portrait-1	2020-09-15T16:28:04+03:00

Returns the first defined, non-null argument.

• Use Array.prototype.find() and Array.prototype.includes() to find the first value that is not equal to undefined or null.

const coalesce = (...args) => args.find(v => ![undefined, null].includes(v));

coalesce(null, undefined, '', NaN, 'Waldo'); // ''