`b?.let { a?.plus(it) ?: it } ?: a` to return null...

# announcements

[elizarov]

b?.let { a?.plus(it) ?: it } ?: a to return null only if both are null

[Czar]

this works, but it's really unreadable, in production code at least extract this to appropriately named method.

[elizarov]

Absolutely. A separate method if you are going to use it in real code