Select objects from array by undefined value? JS

Question

If I have 6 objects in my array, and 4 of these objects have a parentId key:value

myArray[person{}, person{}, person{}, person{}, person{}, person{}]

person{
    name: 'XXX',
    age: 'XXX',
    parentId: 'XXX'
}

Can I select the 2 which have no parentId key:value

person{
    name: 'XXX',
    age: 'XXX'
}

And then put them into a new array?

Amit Joki · Accepted Answer · 2014-10-06 16:28:29Z

2

var newArrWithoutParentId = myArray.filter(function(x){
    return !x.hasOwnProperty("parentId");
});

answered Oct 6, 2014 at 16:21

Amit Joki

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2 Comments

nice and concise, I like it. Just be aware the filter() function is only available in IE9+

@Daft glad to have helped you out! :)