Need callback returns multiple values in nodejs

Question

I want muliple values in my callback function

myfunction(i,function(err,result){
  console.log(JSON.parse(JSON.strigify(result)));   
 ****//i need value here..****


});

function myfunction(i,callback) {
/* my some stuff */
var callBackString= new Array();
                        callBackString['value1']=value1;
                        callBackString['value2']= value2;
                        callBackString['value3']= value3;
                        callback(null,callBackString);

};

I am returting callBackString as an array..,

Can anybody tell me how to do that

Thanks

Try to use var callBackString = {}. You are using your array like an object, so make it one. When you serialize the array with JSON.stringify() those non-array properties get lost. — Sirko
– Sirko, Commented Nov 3, 2014 at 9:35

majidarif · Accepted Answer · 2014-11-03 09:35:21Z

7

You should use an object instead:

function myfunction(i, callback) {
  var callBackString = {};
  callBackString.value1 = value1;
  callBackString.value2 = value2;
  callBackString.value3 = value3;
  callback(null, callBackString);
}

Then the receiving end:

myfunction(i, function(err, result) {
  var value1 = result.value1;
  var value2 = result.value2;
  var value3 = result.value3;

  console.log(JSON.parse(JSON.strigify(result)));   
});

answered Nov 3, 2014 at 9:35

majidarif

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1 Comment

Sirko Over a year ago

The last line in the callback is unnecessary. If you want to make a copy of the data, it should be the first there.

Florent · Accepted Answer · 2014-11-03 09:35:51Z

2

The following should work:

function myfunction(i, callback) {
  // ...
  // Returns an Array
  return callback(null, [value1, value2, value3])
}

function myfunction2(i, callback) {
  // ...
  // Returns an Object
  return callback(null, {value1: value1, value2: value2, value3: value3})
}

answered Nov 3, 2014 at 9:35

Florent

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Comments

Hitu Bansal · Accepted Answer · 2014-11-03 09:31:41Z

-1

Try this

Hope it works

myfunction(i,function(err,value1,value2,value3){
  console.log(JSON.parse(JSON.strigify(result)));   
 ****//i need value here..****


});


function myfunction(i,callback) {
/* my some stuff */
var callBackString= new Array();
                        callBackString['value1']=value1;
                        callBackString['value2']= value2;
                        callBackString['value3']= value3;
                        callback(null,value1,value2,value3);

};

answered Nov 3, 2014 at 9:31

Hitu Bansal

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