gistfile1.txt

class WrapFunc

    constructor: ->
        for key of @
            do (key) =>
                old_fn = @[key]
                @[key] = =>
                    console.log('wrapping call to ' + key)
                    old_fn.apply(@, arguments)

    f: ->
        console.log('calling f')

    g: ->
        console.log('calling g')

    h: ->
        console.log('calling h')

w = new WrapFunc()
w.f()
w.h()
w.g()
w.f()