How to remove duplicate repeating fields

[jg12345]

I want to keep only first instance of OBR.16 when OBR.16.1 length equals 10.
There could be repeating fields where OBR.16.1 equals 10 and these OBR.16 fields should be deleted and other repeating OBR.16 fields should be deleted.

This code works great when only 1 instance of OBR.16.1 length equals 10, but if repeating OBR.16.1 length equals 10, it does not delete.

for (var npi = msg['OBR']['OBR.16'].length() - 1; npi >= 0; npi--) {
if (msg['OBR']['OBR.16'][npi]['OBR.16.1'].toString().length != 10)
delete msg['OBR']['OBR.16'][npi];
}

Message will have only 1 OBR segment.

Example

OBR|1|||||||||||||||1234567891^PHYLAST^PHYFIRST^^^^^^^^^^OTHER~16492578^PHYLAST^PHYFIRST^^~1234567891^PHYLAST^PHYFIRST^^^^^^|

Expected

OBR|1|||||||||||||||1234567891^PHYLAST^PHYFIRST^^^^^^^^^^OTHER|

[pacmano]

if (msg['OBR']['OBR.16'][0]['OBR.16.1'].toString().length == 10) {
  msg['OBR']['OBR.16'] = msg['OBR']['OBR.16'][0]
} 

Hmm - or you need to walk that OBR finding the first one where the length is 10? You can adapt that code of course, just find the first one and set it like I did there using your index in the brackets.

[jg12345]

if (msg['OBR']['OBR.16'][0]['OBR.16.1'].toString().length == 10) {
msg['OBR']['OBR.16'] = msg['OBR']['OBR.16'][0]
} 

Hmm - or you need to walk that OBR finding the first one where the length is 10? You can adapt that code of course, just find the first one and set it like I did there using your index in the brackets.

Yea, the first instance length may not equal 10. Need to keep first one where length equals 10 and delete the rest. OBR.16 can also be empty.

Example:

OBR|1|||||||||||||||123^PHYLAST^PHYFIRST^^OTHER~16492578^PHYLAST^PHYFIRST^^~9876543212^PHYLAST^PHYFIRST^^~1234567891^PHYLAST^PHYFIRST^^^|

Expected

OBR|1|||||||||||||||9876543212^PHYLAST^PHYFIRST^^

[pacmano]

I already mentioned you can adapt the code I posted by adding the iteration to find the correct one to leave remaining.

Using for each:

for each (obr16 in msg['OBR']['OBR.16']) {
 if (obr16['OBR.16.1'].toString().length == 10) {
   msg['OBR']['OBR.16'] = obr16
   break;
 }
} 

[jg12345]

Makes sense.. thanks!