Despite the spirited arguments of various R-core folks who feel that mle() doesn't need a "data" argument, and that users would be better off learning to deal with function closures, I am *still* trying to make such things work in a reasonably smooth fashion ...
Is there a standard idiom for "merging" environments?
i.e., suppose a function has an environment that I want
to preserve, but _add_ the contents of a data list --
would something like this do it? Is there a less ugly
way?
x <- 0
y <- 1
z <- 2
f <- function() {
x+y+z
}
f2 <- function(fun,data) {
L <- ls(pos=environment(fun))
mapply(assign,names(data),data,
MoreArgs=list(envir=environment(fun)))
print(ls(pos=environment(fun)))
}
f2(f,list(a=1))
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