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.
代码片段
const none = (arr, fn = Boolean) => !arr.some(fn);
使用样例
none([0, 1, 3, 0], x => x == 2); // true
none([0, 0, 0]); // true