从当前对象获取属性以在另一个对象中使用属性值
[英]Getting a property from current object to use the property value in another
问题描述
Hello I'm looking on if its possible to get a property of an object and use it in another for example 
您好，我正在研究是否有可能获取对象的属性并将其用于另一个对象
let obj = {
something:"a string",
name:"a test obj
info: {
name: need the name above
}
}
So in the last nested name i want the Name above to be in there too, i tried like this.name but no luck 因此，在最后一个嵌套名称中，我也希望上面的名称也位于其中，我尝试使用this.name，但没有运气
3 个解决方案
解决方案1
0 已采纳 2018-02-06 13:06:25
As a different way to achieve your outcome you could use the getter function on your object. 作为获得结果的另一种方法，可以在对象上使用getter函数。
You basically create a method that will be run when you try to access a property on your object, you can intercept the call and return a different value, because it's at the root of your object it has the correct context to get the name property. 您基本上可以创建一个方法，当您尝试访问对象的属性时，该方法将运行，您可以拦截该调用并返回不同的值，因为它位于对象的根，它具有获取name属性的正确上下文。
let obj = { something:"a string", name:"a test obj", get info() { return { name: this.name } } } console.log(obj.info.name)
解决方案2
0 2018-02-06 13:06:38
If you're going to reuse values like that just declare them as variables before creating the object: 如果要重用这样的值，只需在创建对象之前将它们声明为变量：
const name = 'Bob'; const obj = { something: 'a string', name, info: { name } } console.log(obj);
解决方案3
0 2018-02-06 13:21:11
var app = angular.module("app", []); app.controller("BaseController", function($scope) { let obj = {name:"a test obj"}; obj = {something:"a string",name:"a test obj", info: {name: obj.name} }; $scope.obj = obj; });
<!DOCTYPE html> <html> <head> <script data-require="angularjs@1.5.5" data-semver="1.5.5" src="https://code.angularjs.org/1.5.5/angular.js"></script> <link rel="stylesheet" href="style.css" /> <script src="script.js"></script> </head> <body ng-app="app" ng-controller="BaseController"> {{obj}} </body> </html>
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