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14. Maps (define-map)

Key-value storage for collections.

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Maps store relational data. Maps are not iterable to maintain decidability and deterministic execution cost.

clarity
(define-map Balances principal uint)
(map-set Balances tx-sender u500)

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  1. 1. Can you iterate through all keys in a Clarity map?

  2. 2. How do you fetch a value from a map?

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