make colapply inherit from PipeOpTaskPrepreocSimple

mlr-org / mlr3pipelines

Dataflow Programming for Machine Learning in R

https://mlr3pipelines.mlr-org.com/

GNU Lesser General Public License v3.0

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Closed sumny closed 3 years ago

sumny commented 3 years ago

closes #539 apparently the issue did no longer persist?

mb706 commented 3 years ago

I think this was because empty datasets were making trouble, but that was fixed upstream at some point.