"Determines if every one of the given boolean values (usually a comprehension) is `true`. Boolean allPositive = every { for (x in xs) x>0.0 }; If there are no boolean values, return `true`." see (`function any`, `function Iterable.every`) tagged("Streams") shared Boolean every({Boolean*} values) { for (val in values) { if (!val) { return false; } } return true; }