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lookup(+Map, ++Key, ?Value)

Search a map for a key.
Map
A map
Key
A key to search for
Value
The value corresponding to Key

Description

This predicate searches the map Map for an entry with key Key. If the key is found, then it attempts to unify the corresponding value with Value. If the key is not found, then it aborts with a runtime error.

This predicate should only be called with maps created by other predicates from the map module.

Fail Conditions

Fails if Value does not unify with the value corresponding to Key.

Resatisfiable

no

See Also

member / 3, search / 3