Combine two qenv objects by simple concatenate their environments and the code.
Details
We recommend to use the join method to have a stricter control
in case x and y contain duplicated bindings and code.
RHS argument content has priority over the LHS one.
Examples
q <- qenv()
q1 <- eval_code(q, expression(iris1 <- iris, mtcars1 <- mtcars))
q2 <- q1
q1 <- eval_code(q1, "iris2 <- iris")
q2 <- eval_code(q2, "mtcars2 <- mtcars")
qq <- concat(q1, q2)
get_code(qq)
#> [1] "iris1 <- iris\nmtcars1 <- mtcars\niris2 <- iris\niris1 <- iris\nmtcars1 <- mtcars\nmtcars2 <- mtcars"