Returns true
if the provided predicate function returns false
for all elements in a collection, false
otherwise.
Use Iterable.some()
to test if any elements in the collection return true
based on fn
.
代码实现
bool none<T>(Iterable<T> itr, bool Function(T) fn) {
return !itr.any(fn);
}
使用样例
none([0, 1, 3, 0], (x) => x == 2); // true