In JavaFX 1.3 it used to be something like that:

var z : bind for (x : col) [x + 5];

Some factories to create ObservableLists from ObservableLists and Intervals (not clear yet, if they should end up in Bindings or FXCollections), again generics are just guessed:

public static <D, S> ObservableList<D> forEach(ObservableList<S> list, Runnable1<D, S> map) // dest = bind for (e in source) foo(e)
public static <D, S> ObservableList<D> forEach(ObservableList<S> list, Runnable2<D, S, Integer> map) // dest = bind for (e in source) foo(e, index of e)
public static <D, S> ObservableList<D> forEach(ObservableList<S> list, Map<S, D> map) // dest = bind for (e in source) foo(e, index of e)

public static <D> ObservableList<D> forEach(int start, int end, Runnable1<D, Integer> map) // dest = bind for (i in [start, <end]) foo(i), interval constant
public static <D> ObservableList<D> forEach(int start, int end, int step, Runnable1<D, Integer> map) // dest = bind for (i in [start, <end, step]) foo(i), interval constant

public static <D> ObservableList<D> forEach(ObservableNumberValue start, ObservableNumberValue end, Runnable1<D, Integer> map) // dest = bind for (i in [start, <end]) foo(i), interval can change
public static <D> ObservableList<D> forEach(ObservableNumberValue start, ObservableNumberValue end, ObservableNumberValue step, Runnable1<D, Integer> map) // dest = bind for (i in [start, <end, step]) foo(i), interval can change