Associations
An Association maps keys to values and is similar to a dictionary in Python; it is often sparse in that their key space is much larger than the number of actual keys found in the collection.
- Association — make an association between keys and values
- AssociationQ — test if an expression is a valid association
- Key — indicate a key within a part specification
- Keys — list association keys
- Lookup — perform lookup of a value by key, returning a specified default if it is not found
- Missing — symbolic representation of missing data
- Values — list association values