what’s The Right Way™©® to loop over (thread-receive) and break out of the loop on a special exit value returned fro (thread-receive)? I was doing: (thread (λ () (for ( [i (in-naturals)] [params (thread-receive)]) (define query (first params)) (define records (second params)) (apply query-exec (CONN) query (flatten records)))))) But since (thread-receive) receives a list, params only binds to the first item. I’m also not convinced that this will call (thread-receive) with every iteration

@khepin Use in-producer with a stop value. http://docs.racket-lang.org/reference/sequences.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._in-producer%29%29

That …. looks perfect!

thanks

If (thread-recieve) then produces a list, and you want to iterate over the list as well, do something like this using for*: (for* ([params (in-producer thread-receieve my-stop-value)] [param (in-list params)]) ....)

Thanks!