30-seconds-of-code/snippets/js/s/all-array-elements-are-truthy.md

title, type, language, tags, cover, dateModified

title	type	language	tags	cover	dateModified
Test if all array elements are truthy	snippet	javascript	array	touch-flower	2020-10-18T20:24:28+03:00

Checks if the provided predicate function returns true for all elements in a collection.

• Use Array.prototype.every() to test if all elements in the collection return true based on fn.
• Omit the second argument, fn, to use Boolean as a default.

const all = (arr, fn = Boolean) => arr.every(fn);

all([4, 2, 3], x => x > 1); // true
all([1, 2, 3]); // true