Beyond `map-set`, Clarity provides `map-insert` (fails if key exists) and `map-delete`.
clarity (map-insert Balances tx-sender u100) (map-delete Balances tx-sender)
Advanced map usage.
Beyond `map-set`, Clarity provides `map-insert` (fails if key exists) and `map-delete`.
clarity (map-insert Balances tx-sender u100) (map-delete Balances tx-sender)
1. What does map-insert do if the key already exists?