helper function for building a watch function

(watch/process-options {:supress true :diff true :mode :async :args 2} (fn _ _ 1))

Adds a watch function through the IWatch protocol

Clears all watches form the object

Copies watches from one object to another

Lists watch functions through the IWatch protocol

Removes watch function through the IWatch protocol

Sets a watch in the form of a map

only functions when the inputs are different

((watch/wrap-diff (fn _ _ p n (+ p n))) nil nil 2 2) => 2

((watch/wrap-diff (fn _ _ p n (+ p n))) nil nil 2 3) => 5

changes how the function is run, :sync (same thread) and :async (new thread)

enables operating on a given key

((watch/wrap-select (fn _ _ p n (+ p n)) :a) nil nil {:a 2} {:a 1}) => 3

runs the function but if errors, does not throw exception