Parse Json Object into an two dimensional array in JavaScript

I want to parse a JSON Object into an two dimensional array. But my code don't work.
Here my example:
```

{
"test":[
{
"id": 1,
"first_name": "Robert",
"last_name": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first_name": "Lucy",
"last_name": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first_name": "Anna",
"last_name": "Smith",
"email": "[email protected]"
}
]
};
var as = JSON.parse(test);
console.log(as)
```

I thought an normalized array I can parse with the parse function. But it don't work.

The result array should be like that:

```
[[1,"Robert","Schwartz","[email protected]"],[2,"Lucy","Ballmer","[email protected]"],[3,"Anna","Smith", "[email protected]"]]
```
Thank you for all solutions.

You can simply do this, it will map over tests and return the array contain the values of each object :


const twoDimArr= test.map(obj => Object.values(obj))

You can't parse a JavaScript object. JSON is a text format. You can only parse text. The array is in the property `text` in your object. You can access it with either `.test` or `['test']`. Then you have to convert each object to an array of values. The simplest way to achieve this is with `map` and `Object.values`.

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const test = {
"test":[
{
"id": 1,
"first_name": "Robert",
"last_name": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first_name": "Lucy",
"last_name": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first_name": "Anna",
"last_name": "Smith",
"email": "[email protected]"
}
]
};
const as = test.test.map(el => Object.values(el));
console.log(as)

<!-- end snippet -->

If you're receiving a string you have to parse it:

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const test = `{
"test":[
{
"id": 1,
"first_name": "Robert",
"last_name": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first_name": "Lucy",
"last_name": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first_name": "Anna",
"last_name": "Smith",
"email": "[email protected]"
}
]
}`;
const as = JSON.parse(test).test.map(el => Object.values(el));
console.log(as)

<!-- end snippet -->

Array of Object Values
======================
Run the array through with [`.map()`][1] method and have each object within the array be converted into an array of values with [`Object.values()`][2]. BTW parsing the array of objects is unnecessary, it's already formatted as an array of plain JavaScript objects correctly.

`.map()` and `Object.values()` Methods
----------------------------------
<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const data = [
{
"id": 1,
"first": "Robert",
"last": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first": "Lucy",
"last": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first": "Anna",
"last": "Smith",
"email": "[email protected]"
}
];

const objToArrVal = arrOfObj => {
return arrOfObj.map(obj => Object.values(obj));
}

console.log(objToArrVal(data));



<!-- end snippet -->

An alternative way to the same result that may be JScript compatible is to:

1. Run the first object in the array of objects (ex. `arrayOfObjects[0]`) in a [`for...in` loop][3] to get an array of object keys (ex. `keyArray = ['id', 'first', 'last', 'email']`) -- (we are assuming that all objects have the same set of keys).

2. Once the array of keys has been made, we run each object of the `arrayOfObjects` in a [`for` loop][4].

3. On each iteration of the `for` loop we run the object in another `for` loop that will extract each of the object's values (`arrayOfObject[outerLoopCount][keyArray[innerLoopCount]]`) into a sub-array.

4. Once inner and outer loops have completed extracting the object's values into a sub-array (ex. `valueArray`) it is added to the final array of arrays (ex. `resultArray`).

`for` Loop and `for...in` Loop
-------

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->

const data = [{
"id": 1,
"first": "Robert",
"last": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first": "Lucy",
"last": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first": "Anna",
"last": "Smith",
"email": "[email protected]"
}
];

function forLoopAO(arrOfObj) {
var keyArr = [];
var result = [];

for (var key in arrOfObj[0]) {
keyArr.push(key);
}

for (var o = 0; o < arrOfObj.length; o++) {
var obj = arrOfObj[o];
var valArr = [];

for (var k = 0; k < keyArr.length; k++) {
valArr.push(obj[keyArr[k]]);
}
result.push(valArr);
}
return result;
}

console.log(forLoopAO(data));

<!-- end snippet -->


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A simple `for loop` should do it

let results = [];
for (let i=0; i<test.length; i++) {
results.push(Object.values(test[i]));
}

[![enter image description here][1]][1]

**EDIT:**

If you don't have access to the `Object.values` function you can use another loop to iterate over the object keys and use them to access it's properties

let results = [];
for (let i=0; i<test.length; i++) {
for (let key in test[i]) {
results.push(test[i][key]);
}
}

[1]:

Implementing @zer00ne answer with ES 6

<!-- begin snippet: js hide: false console: true babel: false -->

<!-- language: lang-js -->


const data = [{
"id": 1,
"first": "Robert",
"last": "Schwartz",
"email": "[email protected]"
},
{
"id": 2,
"first": "Lucy",
"last": "Ballmer",
"email": "[email protected]"
},
{
"id": 3,
"first": "Anna",
"last": "Smith",
"email": "[email protected]"
}
];

const convert = arrOfObj => {
const keyArr = Object.keys(arrOfObj[0]);
return arrOfObj.map(obj => keyArr.map(key => obj[key]));
};

console.log(convert(data));

<!-- end snippet -->