none method

bool none(
  1. bool test(
    1. E element
    )
)

Returns true if no element of this satisfies test.

Example:

[1, 2, 3].none((e) => e > 4); // true
[1, 2, 3].none((e) => e > 2); // false

Implementation

bool none(bool Function(E element) test) => !any(test);