Iterates over the elements of a sequence.
var seq = Enumerable.create("grape", "passionfruit", "banana",
"apple", "blueberry")
seq.each(function(x) {
// x[0] = "grape"
// x[1] = "passionfruit"
// x[2] = "banana"
// x[3] = "apple"
// x[4] = "blueberry"
});