Question

I would like to ask how function h can see variable v1 defined in function g. Both h and g are defined in f. The solution I thought is to define the environment e1 and to put there v1.
But this is not working, I get character(0) when I run ls(e1), and I do not know why.

e1 <- new.env()
f <- function(){
    g <- function(){
        e1$v1 <- 5
    }
    h <- function(){
        print(e1$v1)
    }
    h()
}
f()

Thank you in advance

Answer 1

You never actually run the function g(). Try adding g() just before h().

(Although, I feel compelled to add, for the benefit of folks finding this question in the future, that this sort thing, which works agains the natural scoping behavior of R is a dangerous things to play around with. So be careful!)