我试图深入研究以下数组，以在解析完所有连接器类型项后将其变为选择选项。
目前，我可以获取所需的所有数据，但我想将返回的每个项目转换为单个字符串，而不是让它返回具有多个连接器类型的项目作为单个项目（在下面）该示例显示了我当前拥有的/期望，并且仅显示了唯一的类型，因此，如果连接器名称已显示一次，则不要再次显示该名称作为选择。
例如（当前输出）：
（显示重复项，嵌套类型不止一种的项目不会分解成一行）
ConnectorType1
ConnectorType1, ConnectorType2, ConnectorType3
ConnectorType1
ConnectorType1, ConnectorType2
所需的输出：
（仅显示唯一项，所有结果都换行）
ConnectorType1,
ConnectorType2,
ConnectorType3
带有JSON示例的astebin：
{
"ChargeDevice": [
{
"ChargeDeviceId": "cfeedcdd5e287bef4b583158a12363f1",
"ChargeDeviceRef": "SRC_LDN60188",
"ChargeDeviceName": "2 Riddons Road",
"ChargeDeviceText": null,
"ChargeDeviceLocation": {
"Latitude": "51.431454",
"Longitude": "0.031175",
"Address": {
"SubBuildingName": null,
"BuildingName": "",
"BuildingNumber": "",
"Thoroughfare": "Riddons Road",
"Street": "Junction with Chinbrook Road",
"DoubleDependantLocality": null,
"DependantLocality": null,
"PostTown": "Leek",
"County": "Greater London",
"PostCode": "SE12 9QR",
"Country": "gb",
"UPRN": null
},
"LocationShortDescription": null,
"LocationLongDescription": ""
},
"ChargeDeviceManufacturer": null,
"ChargeDeviceModel": null,
"PublishStatusID": "1",
"DateCreated": "2014-08-19 05:15:02",
"DateUpdated": "2015-09-02 11:28:16",
"Attribution": "Source London",
"DateDeleted": "n/a",
"Connector": [
{
"ConnectorId": "1",
"ConnectorType": "3-pin Type G (BS1363)",
"RatedOutputkW": "3.7",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "16",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "1",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 3-pin square (BS 1363) - Standard (up to 3.7kW, 13-16A)",
"Validated": "0"
},
{
"ConnectorId": "2",
"ConnectorType": "Type 2 Mennekes (IEC62196)",
"RatedOutputkW": "7.0",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "32",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "3",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 7-pin 'Smart' eg Mennekes (IEC 62196) - Fast (7kW, 32A)",
"Validated": "0"
}
],
"DeviceOwner": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceController": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceAccess": [],
"DeviceNetworks": "Source London",
"ChargeDeviceStatus": "In service",
"PublishStatus": "Published",
"DeviceValidated": "0",
"RecordModerated": "Y",
"RecordLastUpdated": "2015-09-02 11:28:16",
"RecordLastUpdatedBy": "NCR Admin",
"PaymentRequiredFlag": false,
"PaymentDetails": "",
"SubscriptionRequiredFlag": true,
"SubscriptionDetails": "\u00a35 per annum for RFiD card",
"ParkingFeesFlag": false,
"ParkingFeesDetails": "",
"ParkingFeesUrl": null,
"AccessRestrictionFlag": false,
"AccessRestrictionDetails": "",
"PhysicalRestrictionFlag": false,
"PhysicalRestrictionText": "",
"OnStreetFlag": true,
"LocationType": "On-street",
"Bearing": null,
"Accessible24Hours": false
}
]
}
用于遍历JSON的当前代码：
for (let x = 0; x < data.ChargeDevice[i].Connector.length; x++) {
if (connectors.indexOf(data.ChargeDevice[i].Connector[x].ConnectorType) === -1) {
connectors.push(data.ChargeDevice[i].Connector[x].ConnectorType);
$('#connectorList').append(`<option data-loc-name="${connectors}" value="${connectors}">${connectors}</option>`);
}
}
答案 0 :(得分：1)
您可以拿Set来检查项目是否不在集合中，然后使用该项目并将其添加到集合中。
var array = [{ connector: ['ConnectorType1'] }, { connector: ['ConnectorType1', 'ConnectorType2', 'ConnectorType3'] }, { connector: ['ConnectorType1'] }, { connector: ['ConnectorType1', 'ConnectorType2'] }],
connectors = new Set;
array.forEach(({ connector }) => connector.forEach(c => {
if (connectors.has(c)) return;
console.log(c);
connectors.add(c);
}));
答案 1 :(得分：1)
我建议您遍历与Array.from(myJson.ChargeDevice[0].Connector, ...的所有连接。
然后对于每个连接，将push的值.ConnectorType放入数组（myConnArr）（如果尚不存在）。像这样if(!myConnArr.includes(conn.ConnectorType)) myConnArr.push(conn.ConnectorType)
最后，我join保留所有结果，并像.join(", \n")这样将它们分开。
完整代码段。出于测试目的，我复制了一些连接器值以显示remove_duplicates()正常。
let myJson = {
"ChargeDevice": [
{
"ChargeDeviceId": "cfeedcdd5e287bef4b583158a12363f1",
"ChargeDeviceRef": "SRC_LDN60188",
"ChargeDeviceName": "2 Riddons Road",
"ChargeDeviceText": null,
"ChargeDeviceLocation": {
"Latitude": "51.431454",
"Longitude": "0.031175",
"Address": {
"SubBuildingName": null,
"BuildingName": "",
"BuildingNumber": "",
"Thoroughfare": "Riddons Road",
"Street": "Junction with Chinbrook Road",
"DoubleDependantLocality": null,
"DependantLocality": null,
"PostTown": "Leek",
"County": "Greater London",
"PostCode": "SE12 9QR",
"Country": "gb",
"UPRN": null
},
"LocationShortDescription": null,
"LocationLongDescription": ""
},
"ChargeDeviceManufacturer": null,
"ChargeDeviceModel": null,
"PublishStatusID": "1",
"DateCreated": "2014-08-19 05:15:02",
"DateUpdated": "2015-09-02 11:28:16",
"Attribution": "Source London",
"DateDeleted": "n/a",
"Connector": [
{
"ConnectorId": "1",
"ConnectorType": "3-pin Type G (BS1363)",
"RatedOutputkW": "3.7",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "16",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "1",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 3-pin square (BS 1363) - Standard (up to 3.7kW, 13-16A)",
"Validated": "0"
},
{
"ConnectorId": "1",
"ConnectorType": "3-pin Type G (BS1363)",
"RatedOutputkW": "3.7",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "16",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "1",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 3-pin square (BS 1363) - Standard (up to 3.7kW, 13-16A)",
"Validated": "0"
},
{
"ConnectorId": "2",
"ConnectorType": "Type 2 Mennekes (IEC62196)",
"RatedOutputkW": "7.0",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "32",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "3",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 7-pin 'Smart' eg Mennekes (IEC 62196) - Fast (7kW, 32A)",
"Validated": "0"
}
],
"DeviceOwner": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceController": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceAccess": [],
"DeviceNetworks": "Source London",
"ChargeDeviceStatus": "In service",
"PublishStatus": "Published",
"DeviceValidated": "0",
"RecordModerated": "Y",
"RecordLastUpdated": "2015-09-02 11:28:16",
"RecordLastUpdatedBy": "NCR Admin",
"PaymentRequiredFlag": false,
"PaymentDetails": "",
"SubscriptionRequiredFlag": true,
"SubscriptionDetails": "\u00a35 per annum for RFiD card",
"ParkingFeesFlag": false,
"ParkingFeesDetails": "",
"ParkingFeesUrl": null,
"AccessRestrictionFlag": false,
"AccessRestrictionDetails": "",
"PhysicalRestrictionFlag": false,
"PhysicalRestrictionText": "",
"OnStreetFlag": true,
"LocationType": "On-street",
"Bearing": null,
"Accessible24Hours": false
}
]
};
let myConnArr = [];
Array.from(myJson.ChargeDevice[0].Connector, conn =>
{
if(!myConnArr.includes(conn.ConnectorType)) myConnArr.push(conn.ConnectorType)
});
console.log(myConnArr.join(", \n"));
答案 2 :(得分：0)
不确定这是您要执行的操作，但是这里有一个函数可以返回ChargeDevice和一些测试中的唯一连接器数组。
function getUniqueConnectors(data) {
var connectors = [];
for (let i in data.ChargeDevice) {
for (let x = 0; x < data.ChargeDevice[i].Connector.length; x++) {
if (connectors.indexOf(data.ChargeDevice[i].Connector[x].ConnectorType) === -1) {
connectors.push(data.ChargeDevice[i].Connector[x].ConnectorType);
}
}
}
return connectors;
}
var objectOne = {
"ChargeDevice": [
{
"ChargeDeviceId": "cfeedcdd5e287bef4b583158a12363f1",
"ChargeDeviceRef": "SRC_LDN60188",
"ChargeDeviceName": "2 Riddons Road",
"ChargeDeviceText": null,
"ChargeDeviceLocation": {
"Latitude": "51.431454",
"Longitude": "0.031175",
"Address": {
"SubBuildingName": null,
"BuildingName": "",
"BuildingNumber": "",
"Thoroughfare": "Riddons Road",
"Street": "Junction with Chinbrook Road",
"DoubleDependantLocality": null,
"DependantLocality": null,
"PostTown": "Leek",
"County": "Greater London",
"PostCode": "SE12 9QR",
"Country": "gb",
"UPRN": null
},
"LocationShortDescription": null,
"LocationLongDescription": ""
},
"ChargeDeviceManufacturer": null,
"ChargeDeviceModel": null,
"PublishStatusID": "1",
"DateCreated": "2014-08-19 05:15:02",
"DateUpdated": "2015-09-02 11:28:16",
"Attribution": "Source London",
"DateDeleted": "n/a",
"Connector": [
{
"ConnectorId": "1",
"ConnectorType": "3-pin Type G (BS1363)",
"RatedOutputkW": "3.7",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "16",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "1",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 3-pin square (BS 1363) - Standard (up to 3.7kW, 13-16A)",
"Validated": "0"
},
{
"ConnectorId": "2",
"ConnectorType": "Type 2 Mennekes (IEC62196)",
"RatedOutputkW": "7.0",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "32",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "3",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 7-pin 'Smart' eg Mennekes (IEC 62196) - Fast (7kW, 32A)",
"Validated": "0"
},
{
"ConnectorId": "2",
"ConnectorType": "Type 2 Mennekes (IEC62196)",
"RatedOutputkW": "7.0",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "32",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "3",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 7-pin 'Smart' eg Mennekes (IEC 62196) - Fast (7kW, 32A)",
"Validated": "0"
},
{
"ConnectorId": "2",
"ConnectorType": "Type 2 Mennekes (IEC62196)",
"RatedOutputkW": "7.0",
"RatedOutputVoltage": "230",
"RatedOutputCurrent": "32",
"ChargeMethod": "Single Phase AC",
"ChargeMode": "3",
"ChargePointStatus": "In service",
"TetheredCable": "0",
"Information": " x 7-pin 'Smart' eg Mennekes (IEC 62196) - Fast (7kW, 32A)",
"Validated": "0"
},
],
"DeviceOwner": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceController": {
"OrganisationName": "Source London",
"SchemeCode": "SRC_LDN",
"Website": "https://www.sourcelondon.net",
"TelephoneNo": "020 3056 8989"
},
"DeviceAccess": [],
"DeviceNetworks": "Source London",
"ChargeDeviceStatus": "In service",
"PublishStatus": "Published",
"DeviceValidated": "0",
"RecordModerated": "Y",
"RecordLastUpdated": "2015-09-02 11:28:16",
"RecordLastUpdatedBy": "NCR Admin",
"PaymentRequiredFlag": false,
"PaymentDetails": "",
"SubscriptionRequiredFlag": true,
"SubscriptionDetails": "\u00a35 per annum for RFiD card",
"ParkingFeesFlag": false,
"ParkingFeesDetails": "",
"ParkingFeesUrl": null,
"AccessRestrictionFlag": false,
"AccessRestrictionDetails": "",
"PhysicalRestrictionFlag": false,
"PhysicalRestrictionText": "",
"OnStreetFlag": true,
"LocationType": "On-street",
"Bearing": null,
"Accessible24Hours": false
},
]
};
console.log(getUniqueConnectors(objectOne)); //["3-pin Type G (BS1363)", "Type 2 Mennekes (IEC62196)"]