我有这两个数组。
第一个数组来自用户输入public class ADTService {
AWSCredentials awsCredentials = null;
AmazonDynamoDBClient amazonDynamoDBClient = null;
public Reply sendADTMessage() throws HL7Exception {
Reply reply = new Reply();
PatientInfo patientInfo = new PatientInfo();
byte[] valueDecoded= Base64.decode("TVNIfF5+XFwmfFNtYXJ0fDgwMDB8fEZ8MjAxMzA3MzExMzIyNTl8fEFEVF5BMDF8NDM0MzQzfFB8Mi44fHx8QUx8TkUKRVZOfFAwM3wyMDEzMDczMTEzMjI1OXx8T3x8MjAxMzA3MzExMzIyNTkKUElEfDF8UjQzNTQzNXxSNDM1NDM1fHxCQVRJU1RFXkFOVE9JTkVefHwxOTI1MDIyODAwMDAwMHxNfHx8fHx8fHx8fHw0MzgyNjEzMDcKUFYxfDF8SXxVLTAxXjQwN15BfHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHx8fHwyMDEwMTAwNTAwMDAwMA==");
String decodedADT = new String(valueDecoded);
System.out.println("Decoded value is " + decodedADT);
HapiContext context = new DefaultHapiContext();
context.setValidationContext(new NoValidation());
try {
Parser p = context.getGenericParser();
Message hapiMsg = p.parse(decodedADT);
System.out.println("Decoded value 1 is " + hapiMsg);
ADT_A01 adtMsg = (ADT_A01)hapiMsg;
MSH msh = adtMsg.getMSH();
PID pid = adtMsg.getPID();
EVN event = adtMsg.getEVN();
PV1 pv1 = adtMsg.getPV1();
System.out.println("MSH sending application "+msh.getSendingApplication().getNamespaceID().getValue());
System.out.println("MSH sending facility "+msh.getSendingFacility().getNamespaceID().getValue());
System.out.println("MSH receiving application "+msh.getReceivingApplication().getNamespaceID().getValue());
System.out.println("MSH receiving facility "+msh.getReceivingFacility().getNamespaceID().getValue());
System.out.println("MSH datetime of message "+msh.getDateTimeOfMessage().getValue());
System.out.println("MSH message control id "+msh.getMessageControlID().getValue());
System.out.println("MSH ADT Event "+msh.getMessageType().getMessageCode().getValue()+"-"+msh.getMessageType().getTriggerEvent().getValue());
System.out.println();
System.out.println("EVN recorded datetime "+event.getRecordedDateTime().getValue());
System.out.println();
System.out.println("PID patient id "+pid.getPatientIdentifierList(0).getIDNumber().getValue());
System.out.println("PID patient id "+pid.getPatientID().getValue());
System.out.println("PID last name "+pid.getPatientName(0).getFamilyName().getFn1_Surname().getValue());
System.out.println("PID first name "+pid.getPatientName(0).getGivenName().getValue());
System.out.println("PID dob "+pid.getDateTimeOfBirth().getValue());
System.out.println("PID gender "+pid.getAdministrativeSex().getIdentifier().getValue());
System.out.println();
System.out.println("PV1 admit datetime "+pv1.getAdmitDateTime().getValue());
System.out.println("PV1 bed status "+pv1.getBedStatus().getValueSetOID());
System.out.println("PV1 assigned patient location bed "+pv1.getAssignedPatientLocation().getBed().getNamespaceID().getValue());
System.out.println("PV1 assigned patient location room "+pv1.getAssignedPatientLocation().getRoom().getNamespaceID().getValue());
System.out.println("PV1 assigned patient location floor "+pv1.getAssignedPatientLocation().getFloor().getNamespaceID().getValue());
System.out.println("PV1 assigned patient location building "+pv1.getAssignedPatientLocation().getBuilding().getNamespaceID().getValue());
System.out.println("PV1 prior patient location bed "+pv1.getPriorPatientLocation().getBed().getNamespaceID().getValue());
System.out.println("PV1 prior patient location room "+pv1.getPriorPatientLocation().getRoom().getNamespaceID().getValue());
System.out.println("PV1 prior patient location fllor "+pv1.getPriorPatientLocation().getFloor().getNamespaceID().getValue());
System.out.println("PV1 prior patient location building "+pv1.getPriorPatientLocation().getBuilding().getNamespaceID().getValue());
System.out.println("PV1 discharge datetime "+pv1.getDischargeDateTime().getValue());
patientInfo.setSendingApplication(msh.getSendingApplication().getNamespaceID().getValue());
patientInfo.setSendingFacility(msh.getSendingFacility().getNamespaceID().getValue());
patientInfo.setPatientId(pid.getPatientIdentifierList(0).getIDNumber().getValue());
patientInfo.setGivenName(pid.getPatientName(0).getGivenName().getValue());
patientInfo.setAdministrativeSex(pid.getAdministrativeSex().getIdentifier().getValue());
} catch (Exception e) {
e.getStackTrace();
} finally{
try {
context.close();
} catch (IOException e) {
context = null;
e.printStackTrace();
}
}
patientInfo.setPatientDetails(decodedADT);
ADTService adtService = new ADTService();
adtService.savePatientDetails(patientInfo);
//System.out.println(ADTMessage.Contents);
reply = SubProcess();
return reply;
}
：
$cart第二个数组，我做一个数据库array(3) {
[0]=>
array(3) {
["id"]=>"3"
["weight"]=>"20"
["percentage"]=>"80"
}
[1]=>
array(3) {
["id"]=>"1"
["weight"]=>"50"
["percentage"]=>"80"
}
[2]=>
array(3) {
["id"]=>"2"
["weight"]=>"40"
["percentage"]=>"80"
}
}
，得到SELECT id, stock WHERE id IN (3,1,2)
$db_item我想将第二个数组中的stock属性添加到第一个数组中。
这是我尝试过的方法，并且有效，但是我认为没有必要array(3) {
[0]=>
array(2) {
["id"]=>"1"
["stock"]=>"9539.00"
}
[1]=>
array(2) {
["id"]=>"2"
["stock"]=>"9468.00"
}
[2]=>
array(2) {
["id"]=>"3"
["stock"]=>"9295.00"
}
}
，foreach和array_filter：
array_column任何人都有更好的主意如何优化它？
编辑：在Mohammad's answer之后，我可以在第二个数组中使用更多属性
foreach ($cart as $key => $cart_item) {
$item = array_filter($db_item, function($item) use ($cart_item) {
return $item['id'] === $cart_item['id'];
});
$cart[$key]['stock'] = array_column($item, 'stock')[0];
}
EDIT2 ：我们可以使用$keys = [];
foreach ($arr2 as $item) {
$keys[$item['id']] = array(
'attr1' => $item['attr1'],
'attr2' => $item['attr2'],
// and so on
);
}
$newArr = array_map(function($item) use($keys){
$item['attr1'] = $keys[$item['id']]['attr1'];
$item['attr2'] = $keys[$item['id']]['attr2'];
// and so on
return $item;
}, $arr1);
仅用一行就可以简化foreach循环。
array_column答案 0 :(得分：2)
使用array_flip()和array_column()的组合来创建包含id和第二个数组的索引的数组。
然后使用array_map()向第一个数组添加新键stock。
$keys = array_flip(array_column($arr2, 'id'));
$newArr = array_map(function($item) use($keys, $arr2){
$item['stock'] = $arr2[$keys[$item['id']]]['stock'];
return $item;
}, $arr1);
在demo中查看结果
您还可以使用foreach代替array_flip()
$keys = [];
foreach ($arr2 as $item)
$keys[$item['id']] = $item['stock'];
$newArr = array_map(function($item) use($keys){
$item['stock'] = $keys[$item['id']];
return $item;
}, $arr1);
在demo中查看结果
答案 1 :(得分：1)
这也有帮助，一个array_column +一个array_map：
$arr2=array_column($arr2,'stock','id');
$arr1=array_map(function($val)use($arr2){$val['stock']=$arr2[$val['id']];return $val;},$arr1);