Did you know ... Search Documentation:
Predicate put_dict/3
Availability:built-in
put_dict(+New, +DictIn, -DictOut)
DictOut is a new dict created by replacing or adding key-value pairs from New to Dict. New is either a dict or a valid input for dict_create/3. This predicate is normally accessed using the functional notation. Below are some examples: 
?- A = point{x:1, y:2}.put(#{x:3}).
A = point{x:3, y:2}.

?- A = point{x:1, y:2}.put([x=3]).
A = point{x:3, y:2}.

?- A = point{x:1, y:2}.put([x=3,z=0]).
A = point{x:3, y:2, z:0}.
Tags are associated to your profile if you are logged in
Tags:
LogicalCaptain said (2020-07-15T10:42:54):0 upvotes 0 0 downvotes
Picture of user LogicalCaptain.

Improvement

The argument New should really be called Updates or NewKeyValuePairs because these are updates which are merged with DictIn to give DictOut.

Test cases

dict_put_dotcall_testing.pl