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

title, type, tags, cover, dateModified

title	type	tags	cover	dateModified
Negate predicate	snippet	function	blue-bird	2020-09-15T16:28:04+03:00

Negates a predicate function.

• Take a predicate function and apply the not operator (!) to it with its arguments.

const negate = func => (...args) => !func(...args);

[1, 2, 3, 4, 5, 6].filter(negate(n => n % 2 === 0)); // [ 1, 3, 5 ]