Javascript 循环并将键存储为变量并从存储的键中输出附加字段？

Question

我对 JS 和编码不太熟悉，所以我不确定如何有效地为此编写一个函数。我想编写一个函数，它接受一个对象作为参数并返回另一个对象。

OrderFormContents = {
    servicesSelected: {
        hdrPhotos: "selected",
        panos: "selected",
        twilightPhotos: "selected"
    }
}

hdrPhotos、panos 和 twilightPhotos 都是 SKU/唯一标识符。

我想返回一个像这样的对象:

CompletedOrderFormContents = {
    servicesSelected: {
        hdrPhotos: {
            sku: "hdrPhotos",
            calculatedPrice: 100, // returned from an object stored as a Session variable called calculatedPrices
            title: "HDR Photography" //returned from looking up the sku from a Services collection.
        },
        panos: {
            sku: "panos",
            calculatedPrice: 125,
            title: "Panoramas"
        },
        twilightPhotos: {
            sku: "twilightPhotos",
            calculatedPrice: 200,
            title: "Twilight Photography"
        }
    }
}

到目前为止，我一直在暴力破解它，明确定义所有的 sku，但它很愚蠢:

var myFunction = function(OrderFormContents) {

    CompletedOrderFormContents = {
        servicesSelected: ""
    };

    CompletedOrderFormContents.servicesSelected.hdrPhotos = {
        sku: "hdrPhotos",
        calculatedPrice: Session.get("calculatedPrices").hdrPhotos,
        title: Services.find({"sku" : "hdrPhotos"}).fetch()[0].title
    };

    CompletedOrderFormContents.servicesSelected.panos = {
        sku: "panos",
        calculatedPrice: Session.get("calculatedPrices").panos,
        title: Services.find({"sku" : "panos"}).fetch()[0].title
    };

    CompletedOrderFormContents.servicesSelected.twilightPhotos = {
        sku: "twilightPhotos",
        calculatedPrice: Session.get("calculatedPrices").twilightPhotos,
        title: Services.find({"sku" : "twilightPhotos"}).fetch()[0].title
    };

};

我将如何重构此代码，以便至少不会为每个语句显式定义 SKU 并为每个 SKU 显式定义每个语句？我已经安装了 UnderscoreJS。

编辑让它工作。

completedOrderFormContents = {
  servicesSelected: {}
};

for (sku in OrderFormContents.servicesSelected) {
  if (OrderFormContents.servicesSelected.hasOwnProperty(sku)) {
    completedOrderFormContents.servicesSelected[sku] = {
      sku: sku,
      price: Session.get("calculatedPrices")[sku],
      title: Services.find( { "sku" : sku }).fetch()[0].title
    }
  }
}

Answer 1

我成功了。

//servicesSelected does not currently exist in completedOrderFormContents, 
//so gotta create it - ie. simply doing completedOrderFormContents = {} would not work 
//because the for loop is going to try and assign something to .servicesSelected
//later on and it needs that .servicesSelected key to already be there 

completedOrderFormContents = {
  servicesSelected: {}
};

for (sku in OrderFormContents.servicesSelected) {
  if (OrderFormContents.servicesSelected.hasOwnProperty(sku)) {
    completedOrderFormContents.servicesSelected[sku] = {
      sku: sku,
      price: Session.get("calculatedPrices")[sku],
      title: Services.find( { "sku" : sku }).fetch()[0].title
    }
  }
}