Javascript 构造Json数组时遇到的问题

我花了几个小时努力构建json数组，但没有任何成功。对于有json经验的人来说，这对他来说是小菜一碟

所以我想构建一个json数组，如下所示：

 { 
    "M" : [ {id:"58893_1_M", value:"Ontario", imageFile:"58893_1.jpg"} ] ,
    "L" : [ {id:"58893_1_L", value:"Ontario", imageFile:"58893_1.jpg"} ] , 
    "XL" : [ {id:"58893_1_XL", value:"Ontario", imageFile:"58893_1.jpg"} ] 
 }

代码如下：

 var totalObjects = new Array();

 for (i = 0; i < roomQuotes.length; i++) {

        var selectedClothe = {
            index: []
        };

        var clotheId = some value;
        var clotheQuantity = some value;
        var clotheImage =some value;

        selectedClothe.index.push({ "id": clotheId , "value": clotheQuantity , "imageFile": clotheImage });

        totalObjects.push(selectedClothe);

    }

如何在索引变量中输入值

感谢您的帮助

请尝试：

var totalObjects = {};

 for (i = 0; i < roomQuotes.length; i++) {

        var selectedClothe = [];

        var clotheId = some value;
        var clotheQuantity = some value;
        var clotheImage =some value;

        selectedClothe.push({ "id": clotheId , "value": clotheQuantity , "imageFile": clotheImage });

        totalObjects.[clotheId.substr(clotheId.lastIndexOf('_') +1)] = selectedClothe;

    }

var totalObjects={}；
对于（i=0；i

使用此选项。假设

字符后面的结束衣物ID名称是衣物尺寸

var totalObjects = {}; //selection object

for (i = 0; i < roomQuotes.length; i++) {

    var clotheId = some value;
    var clotheQuantity = some value;
    var clotheImage = some value;

    var clotheSize = clotheId.substr(clotheId.lastIndexOf('_')+1);
    if (typeof(totalObjects[clotheSize]) == 'undefined') {
        //clothe size array not yet exist. create it
        totalObjects[clotheSize] = []; //clothe size array
    }

    totalObjects[clotheSize].push({ "id": clotheId , "value": clotheQuantity , "imageFile": clotheImage });
}
//note: there will be no "totalObjects.XL" if there's no selected clothe of "XL" size

//example: list selected clothe sizes
//see web browser's Error Console for console.log result
var clotheSizes = Object.keys(totalObjects); //clothe size code array
console.log('Selected clothe sizes: '+clotheSizes.join(', '));
//shows e.g.: "M, L, XL" or "" if no selection

//example: get first selected clothe ID of first clothe size selection
if (clotheSize.length > 0) {
    var clothSizeSelections = totalObjects[clotheSizes[0]];
    console.log('First selected clothe ID: '+clothSizeSelections[0].id);
} else {
    console.log('No selection');
}

//example: is "M" clothe size has selection?
if (typeof(totalObjects.M) != 'undefined') {
    console.log(totalObjects.M.length+' selections for clothe size "M"');
} else {
    console.log('No selection for clothe size "M"');
}

var totalObjects={}//选择对象
对于（i=0；i0）{
var clothSizeSelections=totalObjects[ClothSizes[0]]；
console.log（'第一个选择的衣服ID:'+clothSizeSelections[0].ID）；
}否则{
console.log（“无选择”）；
}
//示例：“M”衣服尺寸有选择吗？
if（typeof（totalObjects.M）！=“未定义”）{
console.log（totalObjects.M.length+'衣服尺寸“M”的选择）；
}否则{
console.log（'衣服尺寸“M”没有选择'）；
}
所以在SelectedCloth[索引]中设置一个值？有一个错误索引未定义。是的，您必须声明一个名为
index
的变量，并将其值设置为
M
、
L
、
XL
或其他，然后才能使用它。。。
var totalObjects = {}; //selection object

for (i = 0; i < roomQuotes.length; i++) {

    var clotheId = some value;
    var clotheQuantity = some value;
    var clotheImage = some value;

    var clotheSize = clotheId.substr(clotheId.lastIndexOf('_')+1);
    if (typeof(totalObjects[clotheSize]) == 'undefined') {
        //clothe size array not yet exist. create it
        totalObjects[clotheSize] = []; //clothe size array
    }

    totalObjects[clotheSize].push({ "id": clotheId , "value": clotheQuantity , "imageFile": clotheImage });
}
//note: there will be no "totalObjects.XL" if there's no selected clothe of "XL" size

//example: list selected clothe sizes
//see web browser's Error Console for console.log result
var clotheSizes = Object.keys(totalObjects); //clothe size code array
console.log('Selected clothe sizes: '+clotheSizes.join(', '));
//shows e.g.: "M, L, XL" or "" if no selection

//example: get first selected clothe ID of first clothe size selection
if (clotheSize.length > 0) {
    var clothSizeSelections = totalObjects[clotheSizes[0]];
    console.log('First selected clothe ID: '+clothSizeSelections[0].id);
} else {
    console.log('No selection');
}

//example: is "M" clothe size has selection?
if (typeof(totalObjects.M) != 'undefined') {
    console.log(totalObjects.M.length+' selections for clothe size "M"');
} else {
    console.log('No selection for clothe size "M"');
}