Quick note on missing series features

I tried to use elang.control.makeSeries in a demonstration program. I  
found it lacking:

1. There is asList and asMap, but no asSet.

2. There is no facility to produce a series with specified keys. That  
is, it is impossible to do this using series:

   accum [].asMap() for [k, v] in foo { _.with(f(k), f(v)) }

-- 
Kevin Reid                            <http://homepage.mac.com/kpreid/>