Script for backward-compatibility: https://github.com/douglascrockford/JSON-js/blob/master/json2.js

And call:

var myJsonString = JSON.stringify(yourArray);

Note: The JSON object is now part of most modern web browsers (IE 8 & above). See caniuse for full listing. Credit goes to: @Spudley for his comment below

You can try Javascript's inbuilt functions like this:

var fs = require('fs');
var results = JSON.parse(fs.readFileSync('games.json', 'utf8'));

function grabDataFromAGame(elem, index, array) {
    // Grab the data from the game object you need
    var gameObj = {};
    gameObj.challengerScore = elem.challengerScore;
    gameObj.defenderScore = elem.defenderScore;
    gameObj.id = elem.objectId;
    saveGameObjToFile(gameObj);
}

function saveGameObjToFile(gameObj){
    var gameFile = fs.openSync('./gameObj-' + gameObj.id + '.json', 'w');
    fs.writeSync(gameFile, JSON.stringify(gameObj));
}
results.results.forEach(grabDataFromAGame);

This code generated the following files:

~/salesman 542-> node so.js 
~/salesman 543-> 
~/salesman 543-> 
~/salesman 543-> ll gameObj-*
-rw-r--r--  1 neerajsharma  staff    59B Jun 11 18:56 gameObj-pmiACGwe45.json
-rw-r--r--  1 neerajsharma  staff    59B Jun 11 18:56 gameObj-HqptXdYmQL.json
~/salesman 544-> cat gameObj-pmiACGwe45.json | python -m json.tool
{
    "challengerScore": 18,
    "defenderScore": 21,
    "id": "pmiACGwe45"
}
~/salesman 545-> 

Note that it is not recommended to use sync calls with Node, because node is single-threaded and your application is blocked till the sync calls are complete.

An example of using forEach can be found here

In modern browsers you can simply use JSON.stringify(someJSObject) to convert any JavaScript object (that includes arrays) to a JSON string.

To ensure it also works in less modern browsers, include https://github.com/douglascrockford/JSON-js/blob/master/json2.js on your page.

Your data is insode Photos object, and then you push in an empty array. So when you find from the array, you need to get it from the correct position.

Correct code:

(function test(id) {
let PhotoData = "{\"Photos\":[{\"id\":\"Photo1\", \"Type\": \"Color\", \"Shade\": \"Grey\"}, {\"id\": \"Photo2\", \"Type\": \"Color\", \"Shade\": \"Red\"}]}"
let photoArray = []; //photoArray
let getPhoto = JSON.parse(PhotoData);  //Converting to JSON object
console.log(getPhoto);
photoArray.push(getPhoto); //Pushing to arrayv so that search can be done
console.log(photoArray);
const foundPhoto = photoArray[0].Photos.find((photo) => photo.id == id);

console.log(foundPhoto );
})("Photo1");

Result:

{id: "Photo1", Type: "Color", Shade: "Grey"}

NodeJS has ES5 JSON class which has stringify() method in it

function(error, response, data){
    if(error) {
      console.log(error);
    } else {
      console.log(JSON.stringify(data));
}

JSON.stringify

Build up a JavaScript data structure with the required information, then turn it into the json string at the end.

Based on what I think you're doing, try something like this:

var result = [];
for (var name in goals) {
  if (goals.hasOwnProperty(name)) {
    result.push({name: name, goals: goals[name]});
  }
}

res.contentType('application/json');
res.send(JSON.stringify(result));

or something along those lines.

Edit: Try this:

var query = {"theArray":"[[],\"d\",\"B\",{},\"b\",12,\"A\",\"c\"]"};
var par = JSON.parse(query.theArray);
var stringArray = [];
for ( var i = 0; i < par.length; i++ ) {
    if ( typeof par[i] == "string" ) {
        stringArray.push(par[i]);
    }
}
var jsonString = JSON.stringify( stringArray );
console.log(jsonString);

P.S. I didnt't pay attention. Your array was actually a string. Andrey, thanks for the tip.