none

Returns true if the provided predicate function returns false for all elements in a collection, false otherwise.

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

typescript

const none = (arr: any[], fn: Predicate<any> = Boolean) => !arr.some(fn);

typescript

none([0, 1, 3, 0], (x) => x == 2); // true
none([0, 0, 0]); // true