closure-serializer.coffee

serialize = (fn) -> JSON.stringify body: ''+fn, context: fn._context?() or {}

unserialize = (str) ->
  { body, context } = JSON.parse str
  args = (Object.keys context).join(', ')
  vals = (v for k, v of context).map(JSON.stringify).join(', ')
  eval "(function(#{args}) { return #{body}; })(#{vals})"

ctx = (ctx_fn, fn) -> fn._context = ctx_fn; fn

sum = (a, b) -> ctx (->{a,b}), (c) -> a+b+c

alert (unserialize serialize (sum 2, 4)) 5 # 11