interop_apply.clj

=> (defmacro apply.
     [method-name & object+args]
     `(~method-name ~@(flatten object+args)))
#'user/apply.
=> (apply. .substring "foobar" [0 4])
"foob"


; above works only at compile time, so won't work with seqs of undetermined length at runtime.  A sane place to use eval:

=> (def k [0 4])
#'user/k
=> (def string "foobar")
#'user/string
=> (eval `(.substring ~string ~@k))
"foob"