javascript - 使用用户输入来警告对象内的数组元素 (javascript)

Question

我有一个数据层次结构，其中包含多层对象和数组。结构如下所示:

数据层次结构如下:

1. Cuesta - 父对象
2. 簇 - Cuesta 内的对象
3. 划分 - 簇内的对象
4. 部门 - 部门内的数组(部门数组包含两个对象元素，每个元素都有两个属性:类(class)编号和类(class)标题)。

基本上我需要提示用户指定

1. 集群(周三或新加坡)
2. 分区(WED 为 BUS_ED，MAS 为 MATH，等等)
3. 部门(BUS_ED 为 CIS，ENGR_TECH 为 WELD 等)

然后我需要写入存储在最终选择的数组中的全部信息(其元素是单独的对象)。

基本上我需要知道的是使用字符串变量调用对象的语法。

我已经寻找解决方案一个半小时了，但我不知道我错过了什么。任何帮助将不胜感激!

var clus = prompt("Enter cluster: ");  // User enters cluster
var div = prompt("Enter division: ");  // User enters division
var dep = prompt("Enter department: "); // User enters department

var Cuesta =
{
    WED: {
        BUS_ED: {
            CIS: [{
                course_number: " CIS 201",
                course_title: " Introduction to Computer Science"
            }, {
                course_number: " CIS 231",
                course_title: " Fundamentals of Computer Science"
            }],
            ECON: [{
                course_number: " ECON 101",
                course_title: " Introduction to Economics"
            }, {
                course_number: " ECON 1A",
                course_title: " Intermediary Economics"
            }]
        },
        ENGR_TECH: {
            ENGR: [{
                course_number: " ENGR 101",
                course_title: " Introduction to Engineering"
            }, {
                course_number: " ENGR 1A",
                course_title: " Intermediary Engineering"
            }],
            WELD: [{
                course_number: " WELD 101",
                course_title: " Introduction to Welding"
            }, {
                course_number: " WELD 1A",
                course_title: " Intermediary Welding"
            }]
        }
    },
    MAS: {

        PHY_SCI: {

            PHYS: [{
                course_number: " PHYS 101",
                course_title: " Introduction to Physics"
            }, {
                course_number: " PHYS 1A",
                course_title: " Intermediary Physics"
            }],

            CHEM: [{
                course_number: " CHEM 101",
                course_title: " Introduction to Chemistry"
            }, {
                course_number: " CHEM 1A",
                course_title: " Intermediary Chemistry"
            }]
        },

        MATH: {
            MATH: [{
                course_number: " MATH 101",
                course_title: " Introduction to Mathematics"
            }, {
                course_number: " MATH 1A",
                course_title: " Intermediate Mathematics"
            }]
        },

        BIO: {
            BIO: [{
                course_number: " BIO 101",
                course_title: " Introduction to Biology"
            }, {
                course_number: " BIO 1A",
                course_title: " Intermediate Biology"
            }]
        }
    }
}

var out = Cuesta. + clus. + div. + dep;
/* My attempt at taking the user input to specify a department (array) whose contents I write to the
 webpage*/

document.write("Course number:" + out.[0].course_number + "Course title:");
/*My attempt at writing the user-selected department array to the webpage*/

Answer 1

我会使用嵌套对象，这样就有一个整体对象，此时您可以以这种格式 exampleObject['property'] 访问其属性，该格式可以访问您的子对象，并且可以像这样访问它们的属性这个exampleObject['subObject']['property']该设置应该允许您使用字符串输入或变量来访问不同的属性。对象本身的设置如下所示

var exampleObject={
    subObject:{
        property:'value',
    }
}