ggvis use of " := " in combination with data.table
data.table, ggvis, r
Solution
Both `ggvis` and `data.table` have that function defined to prevent that operator from being used outside of the correct syntax (within correct syntax the packages don't let `R` handle the parsing and that function doesn't get called). You can check what exactly each one does by typing `ggvis::":="` and `data.table::":="` (they both just call `stop` unconditionally).
So the only consequence is going to be a somewhat weird error message if you screw up the syntax (e.g. getting the `data.table` error message in `ggvis` or vice versa, depending on which package you load first).
Problem
When starting up ggvis I get the message : ``` The following object is masked from ‘package:data.table’: := ``` That := is essential for running data.table, which happens to be the alternative for dplyr. My code still runs correctly, but the startup message worries me, since I use data.table in all my scripts. What are the consequences of using := in both data.table and ggvis, given the startup message of ggvis?