Delete object items from an array

Question

I have an object element and an array element which contains some items of the object.

I would like to delete the items in the object referenced by the array.

var array = ["test1","test2"];

var object =     

   ...
"test1": {
    "na": [
        "t",
        "t-t",
        "t-98",
        "t"
    ]
},
"test2": {
    "python": [
        "jjj"
    ]
}

 ...

When I use

delete object.test1

It works.

However in my case, I want :

for(var  i = 0 ; i < array.length ; i++){
    delete object.array[i];
}

But I got :

object.array is undefined

Any ideas ?

Fiddle

it is because your object object does not have a property named array, it is an independent array object, and does not have anything to do with your object object. That is why you get the error. — Trash Can
– Trash Can, Commented Feb 16, 2016 at 16:55

Avraam Mavridis · Accepted Answer · 2016-02-16 16:56:22Z

2

Use object[array[i]], object.array does not exist

If you are using lodash or underscore you can also use the _.omit function.

object = _.omit( object, array )

answered Feb 16, 2016 at 16:56

Avraam Mavridis

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Comments

Chara · Accepted Answer · 2016-02-16 16:56:25Z

1

You would need to use array object notation.

delete object[array[i]]

Array notation is the only way to retrieve property values if you are indexing using a string value.

answered Feb 16, 2016 at 16:56

Chara

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