How to get all objects in a script

Question

I am trying to determine all the objects in a script. ( specifically to get all the dataframes but I'll settle for all the assigned objects ie vectors lists etc.) Is there a way of doing this. Should I make the script run in its own session and then somehow get the objects from that session rather than rely on the global environment.

You could scrape up all the objects and check their class? Note also that you can source a script into its own environment, storing all the values hidden from plain sight. — Roman Luštrik, Apr 27 '19 at 07:52
Thanks @RomanLustrik. I can check classes but how do you scrape up all the objects? — Sebastian Zeki, Apr 27 '19 at 08:46
Check out these answers: https://stackoverflow.com/questions/5796508/loop-through-ls-or-objects — Roman Luštrik, Apr 27 '19 at 10:32

score 1 · Accepted Answer · answered Apr 27 '19 at 12:50

Use the second argument to source() when you execute the script. For example, here's a script:

x <- y + 1
z <- 2

which I can put in script.R. Then I will execute it in its own environment using the following code:

x <- 1   # This value will *not* change
y <- 2   # This value will be visible to the script
env <- new.env()
source("script.R", local = env)

Now I can print the values, and see that the comments are correct

x        # the original one
# [1] 1
ls(env)  # what was created?
# [1] "x" "z"
env$x    # this is the one from the script
# [1] 3

This answer along with dfs – Sebastian Zeki Apr 27 '19 at 13:34 — Sebastian Zeki, Apr 27 '19 at 13:34

How to get all objects in a script

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