Lookup

Lookup(association, key)

return the value in the association which is associated with the key. If no value is available return Missing("KeyAbsent",key).

Lookup(association, key, defaultValue)

return the value in the association which is associated with the key. If no value is available return defaultValue.

Examples

>> Lookup(<|a -> 11, b -> 17|>, a)
11

>> Lookup(<|a -> 1, b -> 2|>, c)
Missing(KeyAbsent,c)

>> Lookup(<|a -> 1, b -> 2|>, c, 42)
42

Related terms

Association, AssociationQ, Counts, Keys, KeySort, Values

Implementation status

• ✅ - full supported

Github

• Implementation of Lookup