Flow-coffee

Started with few little pull requests for https://github.com/willconant/flow-js. Then got tired of compiling coffee to js, posting it and started this repo.

For now original flow-js is rewritten with using of prototypes. It improved performance & memory usage. Just a little. Benchmarks are inside (you'll need node-benchmark package, run it with nbm bench/flow.coffee).

Other differences:

Helpers

flow.anyError = (results) ->
  for result in results
    return result[0] if result?[0]
  null

flow.returnIfAnyError = (results, callback) ->
  return false unless err = @anyError results
  callback? err
  true

Removed upcase

REWIND, MULTI, TIMEOUT are now rewind, multi & setTitmeout. Old names are left for compatibility.

prototype's aftermath

For now works only with engines that support __proto__ (v8 & rhino do).

Now it does mater what context you call multi, setTimeout and other methods.

flow.exec(
  ->
    multi = @multi
    ... ->
      func multi() # wrong
    
  ->
    state = @
    ... ->
      func state.func() # ok
)

Support for not async functions (not working with @multi)

flow.exec(
  ->
    console.log 1
    @()
    console.log 2
  ->
    console.log 3
)
# original flow: 1 3 2
# flow-coffee: 1 2 3

Multiple results are stored in the order the @multi() is called, not callbacks.