how to run a fuction in series NODEJS

Question

I am using the async waterfall model to execute functions in sequence. However, within each function it does not execute statement in series. For instance below

var serviceconfig = loadCsv();
callback(null, serviceconfig);

I want the callback to only execute when the loadCsv() function returns the value but looks like it would continue the execution

apiRoutes.get('/api/:service/:subject', function(req, res) {

async.waterfall([
  function(callback){
    var serviceconfig = loadCsv();
    callback(null, serviceconfig);

  },
  function(serviceconfig, callback){
    console.log("serviceconfig final: " + serviceconfig);
    callback(null, 'd');
  },
  function(argd, callback){     

  }], function (err, result) {

  }
)


});

Nicolai S · Accepted Answer · 2015-07-08 03:04:29Z

1

You could, if it is possible for you, send the callback to the loadCsv, and let it handle it.

var serviceconfig = loadCsv(callback);

And then in loadCsv:

function loadCsv(callback) {
    // code
    callback(null, result);
}

answered Jul 8, 2015 at 3:04

Nicolai S

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