[Swift-user] How can one force ordering into swift operations

Glen Hocky hockyg at gmail.com
Thu Jan 24 10:08:01 CST 2013


Lorenzo,
This may not work for your purposes, but a simple solution similar to what
I do, is to actually do step 1 in the wrapper before the mapping is done.
This guarantees that all files are in place.

Best,
Glen


On Thu, Jan 24, 2013 at 10:43 AM, Lorenzo Pesce <lpesce at uchicago.edu> wrote:

> I have a simple problem:
> step 1: I run an app that splits a file in a group of files and we don't
> know how many they are.
> step2: I want to map those files using a mapper after the fact
>
> Problem is that the mapper doesn't know that it can't run till step 1 is
> done because it has no input files. How can I tell the mapper (and what
> follows it by consequence since those files will not be there) that it has
> to wait for step 1 to b finished?
>
> Thanks,
>
>  Lorenzo
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