What is use for ConcatMap and MergeMap in Rx.js?

Question

Is it possible to block all Data traffic for a specific UE by sending Diameter-Rx AAR command to the PCRF?
If yes, can you indicate AVPs shall be present in the AAR?
May I suppose the following AVP list
- Subscription-Id Containing the targeted MSISDN/IMSI
- Framed-IP-Address or Framed-IPv6-Prefix (containing the IP-address allocated to the UE)
- Media-Component-description containing the following Sub AVP
- Media-Component-number Mandatory sub-AVP
- Flow-Status set to DISABLED

Answer 1

These both output all values, the difference is the ordering.

mergeMap - Order by inner observable
[0,0],[1,0],[0,1],[2,0],[1,1],[3,0],[2,1],[4,0],[3,1],[4,1]

concatMap - Order by outer observable
[0,0],[0,1],[1,0],[1,1],[2,0],[2,1],[3,0],[3,1],[4,0],[4,1]

From the output, mergeMap outer emit can be delayed in the sequence, but concatMap follows strict outer emit sequence.

Read More here - https://stackoverflow.com/questions/49698640/flatmap-mergemap-switchmap-and-concatmap-in-rxjs