Node.js + Bluebird + csv: extra item [object Object] -

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i have following code downloading csv files:

function download_csv(symbol) {     var req_url = url + '&s=' + symbol     var filename = '/prices/' + symbol + '.csv'      return request.getasync(req_url)     .then(function(resp) {         fs.writefileasync(filename, resp)     }) }  promise.map(symbols, download_csv, {concurrency: 128}) .error(function(e) {console.error('error ocurred: ', e.message)}) .done(function() {console.log('done')})

when open csv file, first row shifted right 1 column:

[object object] date    open    high    low close   volume  adj close

the first column should date, not [object object]. error in code?

the value array of [response, body] can .spread:

function download_csv(symbol) {     var req_url = url + '&s=' + symbol     var filename = '/prices/' + symbol + '.csv'      return request.getasync(req_url).spread(function(response, body) {         // add return statement here, important         return fs.writefileasync(filename, body)     }) }

this because callback signature is:

callback(err, response, body)

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