How do I merge JSON objects into 1 JSON object

Question

Given:

var result1 = [{'p1':'v1'}];  
var result2 = [{'p2':'v2'}];  
var array1 = [{'p3':'v3'},{'p4':'v4'}];

Rules:
If array has one property, add property to main array to return.
If array has multiple properties, add a label and keep array as is.

https://jsfiddle.net/3unx0hsa/5/

function mergeJson(data) {  
    let newarray1 = [];

    for (let index = 0; index < resultsArray.length; index++) {
        let element = resultsArray[index][0];

        if (element.length === 1) {            
            newarray1.push(element);
        }

        if (element.length > 1) {
            var x = `{data${index}: ${element}`;
            newarray1.push(x);
        }
    }
}

Illustration:

You asked about merging json objects, but this seems to be more about a question of merging arrays that happen to contain objects. Is that right? — Geuis
– Geuis, Commented Jul 16, 2018 at 21:25
Also, its not clear what this means If array has multiple properties, add a label and keep array as is. What do you mean by adding a label, and where in the data structure does this label expect to be? — Geuis
– Geuis, Commented Jul 16, 2018 at 21:28

Yury Tarabanko · Accepted Answer · 2018-07-16 21:27:21Z

3

Template string literal creates a string. You need an object literal instead

var x = {[`data${index}`]: element};

var result1 = [{'p1': 'v1'}];
var result2 = [{'p2': 'v2'}];
var array1 = [{'p3': 'v3'}, {'p4': 'v4'}];

let x = mergeJson([result1, result2, array1]);
console.log(x);

function mergeJson(resultsArray) {
  let newarray1 = [];

  for (let index = 0; index < resultsArray.length; index++) {
    let element = resultsArray[index];

    if (element.length === 1) {
      newarray1.push(element[0]);
    }

    if (element.length > 1) {
      var x = {[`data${index}`]: element};
      newarray1.push(x);
    }

  }

  return newarray1;
}

answered Jul 16, 2018 at 21:27

Yury Tarabanko

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Comments

PVDM · Accepted Answer · 2018-07-16 21:41:41Z

1

After this line: var x = `{data${index}: ${element}`;, the value for x is a string. That is what you are seeing in you output. Change that line to something like this:

var x = {`{data${index}`: element};

That should give you the result you're expecting.

answered Jul 16, 2018 at 21:41

PVDM

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1 Comment

Barmar Over a year ago

That's invalid syntax. If you try to use an expression as the key in an object literal it needs to be inside [].

Piotr Mirosz · Accepted Answer · 2018-07-16 21:47:25Z

1

Using that type of function you will be able to display Json values

//JSON = objects and you have to call them for examle:

var result1 = [{'p1':'v1'}];  
var result2 = [{'p2':'v2'}];  
var array1 = result1.concat(result2);
for (i in array1){
 array1[i];
for(x in array1[i]){
document.getElementById("test").innerHTML += x+" - "+array1[i][x] +" <br>";
}
}

<div id="test"></div>

answered Jul 16, 2018 at 21:47

Piotr Mirosz

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