every method

bool every(
  1. bool test(
    1. E element

Checks whether every element of this iterable satisfies test.

Checks every element in iteration order, and returns false if any of them make test return false, otherwise returns true. Returns true if the iterable is empty.


final planetsByMass = <double, String>{0.06: 'Mercury', 0.81: 'Venus',
  0.11: 'Mars'};
// Checks whether all keys are smaller than 1.
final every = planetsByMass.keys.every((key) => key < 1.0); // true


bool every(bool test(E element)) {
  for (E element in this) {
    if (!test(element)) return false;
  return true;