Angular JS : using dynamic object names from list of Objects

Question

Is there any way to read an object from a list of objects dynamically with object key. My complex objects is something like :

$scope.mainObject = {
   name : "Some value",
   desc : "Some desc",
   key1: {
      arrayLst: []
   },
   key2: {
      arrayLst: []
   }
}

In my method, I have the key value either key1 or key2 in a string keyValue. How can I write to object like :

$scope.mainObject.key1.arrayLst = data;

In the form of something like :

$scope.mainObject.get(keyValue).arrayLst = data;

use bracket syntax, i.e. $scope.mainObject[keyValue].arrayLst — Claies
– Claies, Commented Sep 16, 2015 at 4:19

Community · Accepted Answer · 2017-05-23 11:44:28Z

1

Well, there's something known as Array notation in JavaScript objects. More on it here.

You can write it something like this :

$scope.mainObject.[keyValue].arrayLst = data;

edited May 23, 2017 at 11:44

CommunityBot

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answered Sep 16, 2015 at 4:21

Manish Kr. Shukla

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5 Comments

Claies Over a year ago

it's called Bracket Notation; even though it uses the same characters [ ] it does not imply that the data is an Array.

Manish Kr. Shukla Over a year ago

Well, i didn't said that it's an array.. Since the approach of accessing the data is quite similar to Arrays, the terminology is so..

Vineet Over a year ago

OP can even use $scope.mainObject["key1.arrayLst[]"] ie square bracket notation

Vineet Over a year ago

@ManishKr.Shukla In my opinion OP has already been declared arrayLst as an array so you should suggest him to push the data in arrayLst.

Claies Over a year ago

@ManishKr.Shukla no, the exact opposite is true. The terminology is "Bracket Notation", or "Square Bracket Notation" specifically to ensure that there is no confusion with the Array data structure. The article you linked to even refers to it as Square Bracket Notation. just by using the word Array in your question, you introduced a suggested comment that doesn't even really make sense about how to manage arrays.

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