infinite streams

[Brian Goetz]

>    fibs.forEachUntil(n -> {

This usage reflects a widespread misunderstanding about what 
forEachUntil is for.  (This misunderstanding is sadly so widespread I 
might consider just removing it.)  To be fair, the docs aren't fully 
written yet, so the warnings aren't all there, but forEachUntil has 
absolutely nothing to do with content-based control.  Trying to distort 
it into doing so will only bring pain.  (Yes, I know you want 
content-based control.  Yes, I've heard all the arguments about why it 
is useful, and I don't disagree, but we don't have that yet, and won't 
for 8.)  Bottom line: this is not the droid you are looking for.