If in-effect were a macro, you'd avoid the ugly lambda (). 

On Aug 3, 2012, at 9:58 AM, Jens Axel Søgaard wrote:

> 2012/8/3 Matthew Flatt <mfl...@cs.utah.edu>:
>> More precisely, evaluation of the `in-value' call is evaluated once,
>> printing a dot and returning a sequence that contains #<void>.
> 
> Would it make sense to include an in-effect ?
> 
> https://github.com/soegaard/this-and-that/blob/master/heart-beat/in-effect.rkt
> 
> -- 
> Jens Axel Søgaard
> 
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