Just as a follow up for anyone else - in the end I used two simple stacks 
for available and active lists of workers and simply popped a worker of the 
available stack when a url came in, assigned it to the worker and then 
pushed it to the active stack. Job done!

On Thursday, December 1, 2016 at 9:07:42 AM UTC, omarsharif...@gmail.com 
wrote:
>
> Yeah I kinda figured I was coming to this wrong way - my tired brain had 
> an unterminated loop. Thanks for the pointers! (all puns intended)
>
> On Wednesday, November 30, 2016 at 5:08:06 PM UTC, omarsharif...@gmail.com 
> wrote:
>>
>> Hi, I'm having a bit of a slow day... I'm trying to synchronise two reads 
>> from two channels and can't get my fuzzy head round the problem.
>>
>> I have a channel containing urls (which will be feed periodically by a 
>> named pipe by another program) and I have a cannel which consists of a pool 
>> of available workers. I'd like to synchronise these and put a worker into a 
>> third channel for active workers if there is a url in the channel and if 
>> there is an available worker.
>>
>> Ideally I'd be able to do something like:
>>
>> go func(urlChan <-chan *url.URL, availableWorkerChan <-chan *worker, 
>> activeWorkerChan chan<- *worker){
>> for {
>> select{
>> case w := <-availableWorkerChan && w.Url = <-urlChan:
>>     activeWorkersChan <- w
>> }
>> }
>> }(a, b, c)
>>
>> But obviously thats not right!
>>
>> Can anyone offer my tired brain a clue?
>>
>> Cheers!
>> Ben
>>
>

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