any

any(Expr, ..., Expr)

Any produces an event every time any of it's arguments produce an event.

any(42, load("/foo/bar"), load("/foo/baz"))

Will produce 42, and then all the updates to /foo/bar and /foo/baz in whatever order they arrive.

mean(any(load("/bench/0/0"), load("/bench/0/1")))

Will produce the average of the values of /bench/0/0 and /bench/0/1.