List.all
all($callbackFunction) -> boolean
Description
Apply $callbackFunction to every item in the list.
Return true only if all items result in true.
$nums = [10, 15, 20]
$nums.all(fun ($n) { return $n >= 10 })
//= true
// or using expression notation
$nums.all(x{ $a >= 10 })
//= true