Added DT[i, c("LHS1","LHS2") := list(RHS1, RHS2), by=...] usage to top of ?":=", thanks to comment by Ross Donaldson (@Gastove).
Added DT[i, c("LHS1","LHS2") := list(RHS1, RHS2), by=...] usage to top of ?":=", thanks to comment by Ross Donaldson (@Gastove).

Rdatatable/data.table,jangorecki/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table,jangorecki/data.table,Rdatatable/data.table,vlulla/data.table,vlulla/data.table,jangorecki/data.table,vlulla/data.table,Rdatatable/data.table