[英]Javascript: group JSON objects using specific key
我有以下JSON對象,並希望通過OrderID合並它們,從而使項目成為對象數組:
[
{
"OrderID":"999123",
"ItemCode":"TED-072",
"ItemQuantity":"1",
"ItemPrice":"74.95",
},
{
"OrderID":"999123",
"ItemCode":"DY-FBBO",
"ItemQuantity":"2",
"ItemName":"DOIY Foosball Bottle Opener > Red",
"ItemPrice":"34.95",
}
]
而且我想知道如何在Javascript中以相同順序合並項目...就像這樣:
[{
"OrderID": "999123",
"Items": [{
"ItemCode": "DY-FBBO",
"ItemQuantity": "2",
"ItemName": "DOIY Foosball Bottle Opener > Red",
"ItemPrice": "34.95"
}, {
"ItemCode": "TED-072",
"ItemQuantity": "1",
"ItemName": "Ted Baker Womens Manicure Set",
"ItemPrice": "74.95"
}]
}]
我建議您使用諸如underscorejs / lazyjs / lodash之類的javascript庫來解決此類問題。
這是使用underscorejs的示例:
var data = [{
"OrderID":"999123",
"ItemCode":"TED-072",
"ItemQuantity":"1",
"ItemPrice":"74.95",
}, {
"OrderID":"999123",
"ItemCode":"DY-FBBO",
"ItemQuantity":"2",
"ItemName":"DOIY Foosball Bottle Opener > Red",
"ItemPrice":"34.95",
}]
var result = _.chain(data).groupBy(function (e) {
return e.OrderID;
}).map(function (val, key) {
return {
OrderID: key,
Items: _.map(val, function (eachItem) {
delete eachItem.OrderID;
return eachItem;
})
};
}).value();
工作示例:
var data = [{ "OrderID":"999123", "ItemCode":"TED-072", "ItemQuantity":"1", "ItemPrice":"74.95", }, { "OrderID":"999123", "ItemCode":"DY-FBBO", "ItemQuantity":"2", "ItemName":"DOIY Foosball Bottle Opener > Red", "ItemPrice":"34.95", }]; var result = _.chain(data).groupBy(function (e) { return e.OrderID; }).map(function (val, key) { return { OrderID: key, Items: _.map(val, function (eachItem) { delete eachItem.OrderID; return eachItem; }) }; }).value(); document.write(JSON.stringify(result));
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
Lodash是一個很棒的Javascript Utility庫,在這種情況下可以為您提供幫助。 在代碼中包含lodash的最新版本,並按以下方式對對象進行分組:
var mergedOrders = _.groupBy(OriginalOrders, 'OrderID');
似乎您必須為每個條目執行一個函數,以檢查它是否匹配
嘗試這個 :
// your array is oldArr
var newArr = []
for (var i=0;i<oldArr.length;i++){
var found = false;
for(var j=0;j<newArr.length;j++){
if(oldArr[i]["OrderID"]==newArr[j]["OrderID"]){
newArr[j]["Items"].push(oldArr[i]);
found=true;
break;
}
if(!found){
newArr.push({"OrderID" : oldArr[i]["OrderID"], "Items" : oldArr[i]});
}
}
這應該做您想要的事情,但是它是一個組函數而不是合並函數:)
您可以在瀏覽器控制台中查看結果。
var items = [ { "OrderID":"999123", "ItemCode":"TED-072", "ItemQuantity":"1", "ItemPrice":"74.95", }, { "OrderID":"999123", "ItemCode":"DY-FBBO", "ItemQuantity":"2", "ItemName":"DOIY Foosball Bottle Opener > Red", "ItemPrice":"34.95", } ]; function groupBy(ungrouped, groupByProperty) { var result = [], getGroup = function (arr, val, groupByProperty) { var result, j, jlen; for (j = 0, jlen = arr.length; j < jlen; j++) { if (arr[j][groupByProperty] === val) { result = arr[j]; break; } } if (!result) { result = {}; result.items = []; result[groupByProperty] = val; arr.push(result); } return result; }, i, len, item; for (i = 0, len = ungrouped.length; i < len; i++) { item = getGroup(result, ungrouped[i][groupByProperty], groupByProperty); delete ungrouped[i][groupByProperty]; item.items.push(ungrouped[i]); } return result; } var grouped = groupBy(items, 'OrderID'); document.getElementById('result').innerHTML = JSON.stringify(grouped); console.log(grouped);
<div id="result"></div>
您需要根據需要循環並創建新的分組對象。
為了更簡單的方法,我建議使用jquery-linq
var qOrderIds = $.Enumerable.From(myArray).Select(function(item) { return item.OrderID; }).Distinct();
var groupedList = qOrderIds.Select(function(orderId) {
return {
OrderID: orderId,
Items : $.Enumerable.From(myArray).Where(function(item) { item.OrderID === orderId}).ToArray()
};
}).ToArray();
感謝您的所有答復。
我能夠實現自己的目標(也許有點骯臟,不如您的美麗,但最終成功了)。 希望這會在將來對其他人有所幫助:
function processJsonObj2(dataObj, cfg) {
var retVal = dataObj.reduce(function(x, y, i, array) {
if (x[cfg.colOrderId] === y[cfg.colOrderId]) {
var orderId = x[cfg.colOrderId];
var addressee = x[cfg.colAddressee];
var company = x[cfg.colCompany];
var addr1 = x[cfg.colAddress1];
var addr2 = x[cfg.colAddress2];
var suburb = x[cfg.colSuburb];
var state = x[cfg.colState];
var postcode = x[cfg.colPostcode];
var country = x[cfg.colCountry];
var orderMsg = x[cfg.colOrderMessage];
var carrier = x[cfg.colCarrier];
delete x[cfg.colOrderId];
delete y[cfg.colOrderId];
delete x[cfg.colAddressee];
delete y[cfg.colAddressee];
delete x[cfg.colCompany];
delete y[cfg.colCompany];
delete x[cfg.colAddress1];
delete y[cfg.colAddress1];
delete x[cfg.colAddress2];
delete y[cfg.colAddress2];
delete x[cfg.colSuburb];
delete y[cfg.colSuburb];
delete x[cfg.colState];
delete y[cfg.colState];
delete x[cfg.colPostcode];
delete y[cfg.colPostcode];
delete x[cfg.colCountry];
delete y[cfg.colCountry];
delete x[cfg.colOrderMessage];
delete y[cfg.colOrderMessage];
delete x[cfg.colCarrier];
delete y[cfg.colCarrier];
var orderObj = {};
orderObj[cfg.colOrderId] = orderId;
orderObj[cfg.colAddressee] = addressee;
orderObj[cfg.colCompany] = company;
orderObj[cfg.colAddress1] = addr1;
orderObj[cfg.colAddress2] = addr2;
orderObj[cfg.colSuburb] = suburb;
orderObj[cfg.colState] = state;
orderObj[cfg.colPostcode] = postcode;
orderObj[cfg.colCountry] = country;
orderObj[cfg.colOrderMessage] = orderMsg;
orderObj[cfg.colCarrier] = carrier;
orderObj["Items"] = [ x, y ];
return orderObj;
} else {
var orderId = x[cfg.colOrderId];
var addressee = x[cfg.colAddressee];
var company = x[cfg.colCompany];
var addr1 = x[cfg.colAddress1];
var addr2 = x[cfg.colAddress2];
var suburb = x[cfg.colSuburb];
var state = x[cfg.colState];
var postcode = x[cfg.colPostcode];
var country = x[cfg.colCountry];
var orderMsg = x[cfg.colOrderMessage];
var carrier = x[cfg.colCarrier];
var itemCode = x[cfg.colItemCode];
var itemQuantity = x[cfg.colItemQuantity];
var itemName = x[cfg.colItemName];
var itemPrice = x[cfg.colitemPrice];
var item = {};
item[cfg.colItemCode] = itemCode;
item[cfg.colItemQuantity] = itemQuantity;
item[cfg.colItemName] = itemName;
item[cfg.colItemPrice] = itemPrice;
var orderObj = {};
orderObj[cfg.colOrderId] = orderId;
orderObj[cfg.colAddressee] = addressee;
orderObj[cfg.colCompany] = company;
orderObj[cfg.colAddress1] = addr1;
orderObj[cfg.colAddress2] = addr2;
orderObj[cfg.colSuburb] = suburb;
orderObj[cfg.colState] = state;
orderObj[cfg.colPostcode] = postcode;
orderObj[cfg.colCountry] = country;
orderObj[cfg.colOrderMessage] = orderMsg;
orderObj[cfg.colCarrier] = carrier;
orderObj["Items"] = [ item ];
return orderObj;
}
});
return retVal;
}
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