[m-dev.] Suggestion for a new "where" operator

[Ralph Becket]

Peter Schachte, Tuesday,  5 August 2003:
> 
> BTW, just to be clear on this, I'm assuming in in (E where G), E is an
> expression, not a variable.  So eg, I could write
> 
> 	Avg = (Sum/Count where sum_count(List, Sum, Count))

Yes, but a variable is also an expression!
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