Objects var names inside arrays in JavaScript

Question

Is it possible to add a variable name of each objects inside in an array in JavaScript. I mean something like this (pseudocode):

var arr = [ 
    object 1 name { 
        key1: "some value",
        key2: "some value",
        key3: "some value"
    }, 
    object 2 name { 
        key1: "some value",
        key2: "some value",
        key3: "some value"
    }
]

or it's only possible to be like this :

var arr = [ 
    { 
        key1: "some value",
        key2: "some value",
        key3: "some value" 
    },
    { 
        key1: "some value",
        key2: "some value",
        key3: "some value"
    }
]

What I'm trying to say is, can I give a name for each object element inside an array?

Thank you in advance.

Jonathan Wilson · Accepted Answer · 2018-12-04 22:02:49Z

1

If you find yourself wishing to name members of an array (presumably for lookup by name later), you should probably use a dictionary (ie. an object) instead.

var data = { 
    object1: {
        key1: "some value",
        key2: "some value",
        key3: "some value"
    },
    object2: { 
        key1: "some value",
        key2: "some value",
        key3: "some value"
    }
};

Then, you can access object2 like this:

var object2 = data.object2; or var object2 = data['object2'];

On the other hand, you can access members of an array by their index like this:

var object2 = arr[1];

edited Dec 4, 2018 at 22:02

answered Dec 4, 2018 at 21:57

Jonathan Wilson

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1 Comment

Kristianmitk Over a year ago

this is the best way to go - also note: Object.values(data) returns an array holding all the values of your dictionary

scunliffe · Accepted Answer · 2018-12-04 22:09:24Z

0

If you still want to have an array, you can do so by naming each item in that array (your choice if you want the sub-data at the same level, or nested).

var data = [
  {
    id: "John",
    data: {
      key1: "some value",
      key2: "some value",
      key3: "some value"
    }
  },
  {
    id: "Susan",
    data: { 
      key1: "some value",
      key2: "some value",
      key3: "some value"
    }
  }
];

answered Dec 4, 2018 at 22:09

scunliffe

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