创建一个JavaScript对象，用于获取每个数组项并对其进行整理

我试图创建一个JavaScript对象，该对象获取BusinessData中的每个

服务

数组，然后按如下方式对其进行整理：

services: [
                {
                    id: 1,
                    businessId: 1,
                    title: 'Brake Fluid Refresh'
                },
                {
                    id: 2,
                    businessId: 1,
                    title: 'Diagnostics'
                },
                {
                    id: 3,
                    businessId: 1,
                    title: 'Coolant Refresh'
                },
                {
                    id: 4,
                    businessId: 1
                    title: 'Oil Change'
                },
                {
                    id: 5,
                    businessId: 1,
                    title: 'MOT'
                },
                {
                    id: 6,
                    businessId: 1,
                    title: 'Summer Check'               
                },
                {
                    id: 7,
                    businessId: 1,
                    title: 'Winter Check'                   
                }           
            ]

这是我目前的代码：

var businessData = [
        {
            id: 1,
            categoryId: 1,
            name: 'Japan Center Garage',
            services: [
                {
                    id: 1,
                    businessId: 1,
                    title: 'Brake Fluid Refresh'
                },
                {
                    id: 2,
                    businessId: 1,
                    title: 'Diagnostics'
                }               
            ]
        },
        {
            id: 2,
            categoryId: 1,
            name: 'Rex Garage',
            services: [
                {
                    id: 3,
                    businessId: 1,
                    title: 'Coolant Refresh'
                },
                {
                    id: 4,
                    businessId: 1
                    title: 'Oil Change'
                }   
            ]
        },
        {
            id: 3,
            categoryId: 1,
            name: 'Mission & Bartlett Garage',
            services: [
                {
                    id: 5,
                    businessId: 1,
                    title: 'MOT'
                },
                {
                    id: 6,
                    businessId: 1,
                    title: 'Summer Check'               
                },
                {
                    id: 7,
                    businessId: 1,
                    title: 'Winter Check'                   
                }               
            ]
        }               
    ]

    return {
        getAllCategories: function () {
            return categoryData;
        },

        getAllServices: function () {
            var servicesData = {
                services: []
            };
            for(var i = 0; i < businessData.length; i++) {
                if(businessData[i].services) {
                    servicesData['services'].push(businessData[i].services)
                }
            }
            return servicesData;
        },

        getAllBusinesses: function () {
            return businessData;
        },
    }
}])

谁能告诉我出了什么问题吗

var services = [];

businessData.forEach(function (business) {
    Array.prototype.push.apply(services, business.services);
});

---

您就快到了，但您正在将服务数组推送到一个数组中。通过使用Array.prototype.push.apply，我们将服务推送到一个数组中。这最终会给你想要的结果：）

你可以使用lodash，你最好将它添加到你的工具箱中

以下是它的外观：

甚至

_.flatMap(businessObject, "services")

为了让它更详细一点，您正在进行映射，然后将其展平：

var mapped = _.map(businessObject, "service")
var services = _.flatten(mapped)

在代码中找不到“serviceList”数组。

_.flatMap(businessObject, (d) => d.services)

_.flatMap(businessObject, "services")

var mapped = _.map(businessObject, "service")
var services = _.flatten(mapped)