Returns true
if the provided predicate function returns true
for all elements in a collection, false
otherwise.
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.
代码片段
const all = (arr, fn = Boolean) => arr.every(fn);
使用样例
all([4, 2, 3], x => x > 1); // true
all([1, 2, 3]); // true