how can I return an array back in nodejs

Question

I called a function to count, and I would like to return the data as an array and use it then, how can I do the same . where this returned arr is been stored, so I can use t in main code

var newArr =[]
    countData(jsonData).then(function (res) {
        console.log(arr)
        console.log('end')
    })

    function countData(jsonData){
        var five=0, two =0
        for(var i in jsonData){
            console.log(jsonData)
            if(jsonData.num == '5'){
                five++;
            }
            else{
                two++;
            }
        }//for
        var arr =[]
        arr[0]=five
        arr[1]=two
        return arr
    }//function

benalman.com/news/2010/03/theres-no-such-thing-as-a-json

Quentin
– Quentin

2020-05-21 11:30:23 +00:00
Commented May 21, 2020 at 11:30 — Quentin
– Quentin, Commented May 21, 2020 at 11:30

Quentin · Accepted Answer · 2020-05-21 11:35:26Z

2

The return value of countData is an array.

It isn't a Promise. The doesn't have a then method. Just use the return value directly.

const data = {
  "num": "2",
  "num": "5",
  "num": "5",
  "num": "2",
  "num": "2",
  "num": "2"
}
const result = countData(data);
console.log(result);

function countData(jsonData) {
  var five = 0,
    two = 0
  for (var i in jsonData) {
    console.log(jsonData)
    if (jsonData.num == '5') {
      five++;
    } else {
      two++;
    }
  } //for
  var arr = []
  arr[0] = five
  arr[1] = two
  return arr
} //function

answered May 21, 2020 at 11:35

Quentin

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