Description Usage Arguments Value
Scheduled parallel processing
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| inext | A function (without argument) returning an object to process; NULL if none left; this function is run in the main thread | 
| fun | Function to process the object returned by inext; this function is run in children thread | 
| max.parallel.jobs | Number of jobs to start in parallel | 
| ... | Further arguments passed to fun | 
| stop.onfail | Throw error if one | 
| tracefun | Callback function that will be executed in a separate thread | 
| tracefun.period | Time intervall between calls to tracefun | 
Return value of applied function
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