javascript - 如何将公共(public)属性添加到所有对象的属性(速记)

Question

我的 Object 的每个属性都有公共(public)属性(称为:selected)，是否有一种简短的方法可以将此属性注入(inject)每个属性没有明确地写出每一个？

请注意，我已经查看了这个 answer但它只谈论数组

var myObject = {
    propery1: {
        selected: function () {
            return this.value === someVariable;
        },                    
        value: 1,                    
    },
    propery2: {
        selected: function () {
            return this.value === someVariable;
        },                    
        value: 2,                    
    },
    propery3: {
        selected: function () {
            return this.value === someVariable;
        },                    
        value: 3,                    
    },

    //...

    propery10: {
        selected: function () {
            return this.value === someVariable;
        },
        value: 10,
    },
};

例如:

var someVariable = 1;

输出:

myObject = {
    propery1: {
        selected: true,                    
        value: 1,                    
    },
    propery2: {
        selected: false,
        value: 2,                    
    },
    propery3: {
        selected: false,
        value: 3,                    
    },

    //...

    propery10: {
        selected: false,
        value: 10,
    },
};

Answer 1

您可以绑定(bind)内部对象，调用函数并分配值。

var object = { propery1: { selected: function () { return this.value === someVariable; }, value: 1 }, propery2: { selected: function () { return this.value === someVariable; }, value: 2 }, propery3: { selected: function () { return this.value === someVariable; }, value: 3 }, propery10: { selected: function () { return this.value === someVariable; }, value: 10 } },
    someVariable = 1;

Object.keys(object).forEach(k => object[k].selected = object[k].selected.call(object[k]));

console.log(object);

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