CODEWITHSUNDEEP
javascriptobject
André Kuhlmann
André Kuhlmann

Reputation: 4668

Refer to another Object inside own JavaScript Object

I declare Homebrew as a dependency for cask and referred to homebrew by this.homebrew[0]. Is anything like this possible with JavaScript?

var data = {
  homebrew: [
    {
      title: "Homebrew",
      dependencies: [],
      install: function() {
         console.log('homebrew')
      }
    },
    {
      title: "Cask",
      dependencies: [
         this.homebrew[0]
      ],
      install: function() {
         console.log('cask')
      }
    }
  ]
}

Upvotes: 1

Views: 64

Answers (3)

RomanPerekhrest
RomanPerekhrest

Reputation: 92854

The solution using Javascript get syntax(defining a getter):

var data = {
  homebrew: [
    {
      title: "Homebrew",
      dependencies: [],
      install: function () {
        console.log('homebrew')
      }
    },
    {
      title: "Cask",
      get dependencies() {   //  <-- getter function
        return [data.homebrew[0]]
      },
      install: function () {
        console.log('cask')
      }
    }
  ]
};

console.log(data.homebrew[1].dependencies[0]);

Upvotes: 1

Matt Spinks
Matt Spinks

Reputation: 6698

One possibility is to use a separate dependency object.

var data = {
  homebrew: [
    {
      title: "Homebrew",
      dependencies: [],
      install: function() {
         console.log('homebrew')
      }
    },
    {
      title: "Cask",
      dependencies: [
         this.homebrew[0]
      ],
      install: function() {
         console.log('cask')
      }
    }
  ]
};

var dependencies = [
  {
    data.homebrew[0],
    data.homebrew[1]
  }
];

Upvotes: 0

Seiyria
Seiyria

Reputation: 2132

This is possible. One thing you can do is create your objects outside of the array, and set up references that way, such as:

var Homebrew = { title: "Homebrew" }
var Cask = { title: "Cask", dependencies: [Homebrew] }
var data = [ Homebrew, Cask ]

Upvotes: 2

Related Questions