Question

我将Homebrew声明为cask的依赖项，并通过this.homebrew[0]引用自制程序。用JavaScript可以做到这一点吗？

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

Answer 1

这是可能的。您可以做的一件事是在数组外部创建对象，并以这种方式设置引用，例如：

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

Answer 2

使用Javascript https://github.com/feross/buffer语法（定义getter ）的解决方案：

＆＃13;

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]);

＆＃13;

Answer 3

一种可能性是使用单独的依赖对象。

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]
  }
];

请参阅自己的JavaScript对象中的另一个对象

3 个答案: