get_dict_ex/3

5.4.2 Predicates for managing dicts

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Documentation
- Reference manual
  - SWI-Prolog extensions
    - Dicts: structures with named arguments
      - Predicates for managing dicts
        
        is_dict/1
        
        is_dict/2
        
        get_dict/3
        
        get_dict_ex/3
        
        get_dict/5
        
        dict_create/3
        
        dict_pairs/3
        
        put_dict/3
        
        put_dict/4
        
        del_dict/4
        
        :</2
        
        select_dict/3
        
        >:</2
        
        Destructive assignment in dicts
- Packages

get_dict_ex(?Key, +Dict, -Value)

As get_dict/3, but throws an existence exception if Key cannot be found in dict. This is used when evaluating Dict.Key as a function.