d = data.table(a=1, b=1) dropcols = character() set(d, NULL, dropcols, NULL) #Warning message: #In set(d, NULL, dropcols, NULL) : # length(LHS)==0; no columns to delete or assign RHS to.
I don't think we really need a warning here, it could work without the need for if (length(dropcols)) set(...).
I don't think we really need a warning here, it could work without the need for if (length(dropcols)) set(...).