[英]How to append an object to each item in an array
I am trying to append an object to an array, but cart[i]['items'][j][order]
is not getting set properly.我正在尝试将一个对象附加到一个数组中,但是
cart[i]['items'][j][order]
没有正确设置。
When logging cart[i]['order']
it returns an Object
.当记录
cart[i]['order']
它返回一个Object
。
The cart is of the form:购物车的形式为:
[{
"order": {
"amtSubTotal": 3812.8900000000003,
"noPo": "Default P.O."
},
"items": [{
"adjustments": { "isCustom": "N" },
"lineNote": { "noteLine": "" }
},{
"adjustments": { "isCustom": "N" },
"lineNote": { "noteLine": "" }
}]
}]
Expected Result预期结果
[{
"order": { "amtSubTotal": 3812.8900000000003,"noPo": "Default P.O." },
"adjustments": { "isCustom": "N" },
"lineNote": { "noteLine": "" }
}, {
"order": { "amtSubTotal": 3812.8900000000003,"noPo": "Default P.O." },
"adjustments": { "isCustom": "N" },
"lineNote": { "noteLine": "" }
}]
Code代码
let cart = JSON.parse(localStorage.getItem('cart-data'));
let i = 0, j = 0, l = cart.length;
let nData = [];
for (i = 0; i < l; i++) {
let m = cart[i]['items'].length;
for (j = 0; j < m; j++) { // Spreading data {...data[i]} created a shallow copy bug
cart[i]['items'][j].push({"order": cart[i]['order']}); // Try using JSON methods instead
nData.push(cart[i]['items'][j]);
}
}
Alternate Attempt替代尝试
for (i = 0; i < l; i++) {
let m = cart[i]['items'].length;
for (j = 0; j < m; j++) {
// cart[i]['items'][j]['order'] = JSON.stringify(JSON.parse(cart[i]['order'])); // Try using JSON methods instead
nData.push(cart[i]['items'][j]);
}
}
console.log(nData); // order data not appended to cart[i]['items'][j]
How can I add this object to each cart[i]['items'][j]
element?如何将此对象添加到每个
cart[i]['items'][j]
元素?
You code generate a error on push of cart[i]['items'][j].push(...)
remove a [j]
您的代码在推车时生成错误
cart[i]['items'][j].push(...)
删除[j]
Try this:尝试这个:
let carts = [{ order: { amtSubTotal: 3812.8900000000003, noPo: "Default PO" }, items: [{ adjustments: { "isCustom": "N" }, lineNote: { "noteLine": "" } },{ adjustments: { "isCustom": "N" }, lineNote: { "noteLine": "" } }] }]; nData = []; carts.forEach((cart, idx1) => { cart['items'].forEach((item, idx2) => { item.order = cart.order; nData.push(item) }) }); console.log(nData);
Use map() to modify your object on each iteration and to add items object's properties iterate through key values for(let [key, value] of Object.entries(itemObj)
使用 map() 在每次迭代时修改您的对象,并添加 items 对象的属性迭代通过键值
for(let [key, value] of Object.entries(itemObj)
Try running this snippet.尝试运行此代码段。 Ive added second item in cart for testing purpose
我在购物车中添加了第二个项目以进行测试
let cart=[{"order": {"amtSubTotal": 3812.8900000000003,"noPo": "Default PO"},"items": [{"adjustments": { "isCustom": "N" }, "lineNote": { "noteLine": "" }},{"adjustments": { "isCustom": "N" }, "lineNote": { "noteLine": "" }}]},{"order": {"amtSubTotal": 3112.8900000000003,"noPo": "Default RO"},"items": [{"adjustments": { "isCustom": "Y" }, "lineNote": { "noteLine": "1" }},{"adjustments": { "isCustom": "N" }, "lineNote": { "noteLine": "5" }}]}] let result=cart.map( orderObj =>{ let obj={order:orderObj.order}; orderObj.items.forEach( itemObj =>{ for(let [key, value] of Object.entries(itemObj)) obj[key]=value; }); return obj }); console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
You can try with destructuring and map as below.您可以尝试如下解构和映射。 (In the arrow function argument, destructure
order
and items
, use map
to over items and add the contents of order.) (在箭头函数参数中,解构
order
和items
,使用map
覆盖 items 并添加 order 的内容。)
const update = ([{ order, items }]) => items.map(itm => ({ order: {...order}, ...itm })); const data = [ { order: { amtSubTotal: 3812.8900000000003, noPo: "Default PO" }, items: [ { adjustments: { isCustom: "N" }, lineNote: { noteLine: "" } }, { adjustments: { isCustom: "N" }, lineNote: { noteLine: "" } } ] } ]; console.log(update(data));
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