Converting a JS object to an array using jQuery

Converting a JS object to an array using jQuery

My application creates a JavaScript object, like the following:
myObj= {1:[Array-Data], 2:[Array-Data]}

But I need this object as an array.
array[1]:[Array-Data]
array[2]:[Array-Data]

So I tried to convert this object to an array by iterating with $.each through the object and adding the element to an array:
x=[]
$.each(myObj, function(i,n) {
x.push(n);});

Is there an better way to convert an object to an array or maybe a function?

Solutions/Answers:

Solution 1:

var myObj = {
    1: [1, 2, 3],
    2: [4, 5, 6]
};

var array = $.map(myObj, function(value, index) {
    return [value];
});


console.log(array);

Output:

[[1, 2, 3], [4, 5, 6]]

Solution 2:

If you are looking for a functional approach:

var obj = {1: 11, 2: 22};
var arr = Object.keys(obj).map(function (key) { return obj[key]; });

Results in:

[11, 22]

The same with an ES6 arrow function:

Object.keys(obj).map(key => obj[key])

With ES7 you will be able to use Object.values instead (more information):

var arr = Object.values(obj);

Or if you are already using Underscore/Lo-Dash:

var arr = _.values(obj)

Solution 3:

I think you can use for in but checking if the property is not inerithed

myObj= {1:[Array-Data], 2:[Array-Data]}
var arr =[];
for( var i in myObj ) {
    if (myObj.hasOwnProperty(i)){
       arr.push(myObj[i]);
    }
}

EDIT – if you want you could also keep the indexes of your object, but you have to check if they are numeric (and you get undefined values for missing indexes:

function isNumber(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}

myObj= {1:[1,2], 2:[3,4]}
var arr =[];
for( var i in myObj ) {
    if (myObj.hasOwnProperty(i)){
        if (isNumber(i)){
            arr[i] = myObj[i];
        }else{
          arr.push(myObj[i]);
        }
    }
}

Solution 4:

Simply do

Object.values(obj);

That’s all!

Solution 5:

If you know the maximum index in you object you can do the following:

var myObj = {
    1: ['c', 'd'],
    2: ['a', 'b']
  },
  myArr;

myObj.length = 3; //max index + 1
myArr = Array.prototype.slice.apply(myObj);
console.log(myArr); //[undefined, ['c', 'd'], ['a', 'b']]

Solution 6:

Since ES5 Object.keys() returns an array containing the properties defined directly on an object (excluding properties defined in the prototype chain):

Object.keys(yourObject).map(function(key){ return yourObject[key] });

ES6 takes it one step further with arrow functions:

Object.keys(yourObject).map(key => yourObject[key]);