Step.js ported to coffeescript, with fewer features

step.coffee

# Step(
#   () -> redis.select 15, @
#   () -> redis.flushdb @
#   () -> redis.rpush 'fakelist', '1', @
#   () -> redis.rpush 'fakelist', '2', @
#   () -> redis.rpush 'fakelist', '3', @
#   () -> redis.lrange 'fakelist', 0, 1, @
#   (err, arr) ->
#     console.log arr.length
#     console.log arr[0].toString()
#     console.log arr[1].toString()
#     @()
#   () -> redis.close()
# )
Step = (queue...) ->
  context = (args...) ->
    if fn = queue.shift()
      try
        run fn, args
      catch err
        run fn, [err]

  run = (fn, args) ->
    fn.apply context, args

  context()

# If the first arg exists, log it to the console, and then pass the 
# rest of the args to the next step.
Step.errCheck = (err, args...) ->
  console.log err.stack if err
  @(args...)

module.exports = Step