# Checks if at least one element respects a predicate
        #
        # ~~~~nitish
        # fun eq10(x: Int): Bool do return x == 10
        #
        # var pred = &eq10
        # var xs = [1,2,5,7,9,10,44]
        # assert xs.iterator.any(pred)
        # var ys = []
        # assert not ys.iterator.any(pred)
        # assert not [1,2,44].iterator.any(pred)
        # ~~~~
        fun any(pred: Fun1[E,Bool]): Bool
        do
                for x in self do
                        if pred.call(x) then
                                return true
                        end
                end
                return false
        end