passing parameters to Node.js async waterfall

Question

I need to pass some parameters to the initial function of async waterfall(). The proposed method https://github.com/caolan/async/issues/14 does not work for me as I need to pass it the response from an ExpressJS function

exports.categories = (req, res) ->
    async.waterfall [           
       (callback) ->
         # need req here...

"*need req here*." You should already [have it in scope](https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Closures#Practical_closures) there. — Jonathan Lonowski, Oct 27 '12 at 07:08

score 4 · Answer 1 · answered Jan 20 '15 at 09:34

4

async.waterfall([
  async.apply(function(req, callback) {}, req);
]);

answered Jan 20 '15 at 09:34

mathieug

This answer is also one of the way to achieve it. async.apply(fnName, req); Thanks – abhy Sep 18 '17 at 08:56

score 1 · Accepted Answer · answered Oct 27 '12 at 13:53

1

async.waterfall [
  ( (req, callback) ->

  ).bind(null, req)
]

answered Oct 27 '12 at 13:53

Pickels

2 Answers2