title: negate tags: function,beginner

Negates a predicate function.

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

export const negate = (func: Function) => (...args: any[]) => !func(...args);

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