>  maybe  j=:[: < 3 , <  . 

This should've had a  ;  in place of the  ,  .

I guess I should point out explicitly that  I'm using a rightmost  <  instead 
of a  ]  because  < x ; y  doesn't quite do what you
want in this case, if  y  were boxed (it's quite possible to have  (< 3 ; < 
something else) {  a  ).

-Dan

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