Re: [pure-lang-users] list comprehensions

[Jiri S. <jir...@bl...>]

Eddie Rucker wrote:
> Is there a way to create a new value from separate values inside a list comprehension?
> 
> ranked is a list of lists. I want to addelement 2 and 4 and record the result if 
> it is positive. Yes, it is trival to do without a list comprehension but I want
> to do it with one.
> 
> [v; v > 0; v = rw!2 + rw!4; rw = ranked];
> 
> I know this doesn't work;
> 
> [v; rw = ranked; v > 0] when v = rw!2 + rw!4 end;
> 
E. g. this way:

[v; v = map (\rw -> rw!2 + rw!4) ranked; v > 0];


Jiri