json_dict_pairs/2

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Predicate json_dict_pairs/2

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Availability::- use_module(library(json)).

[semidet,multifile]json_dict_pairs(+Dict, -Pairs)

This hook may be used to order the keys of an object. If it fails, dict_pairs/3 is used which produces an ordered list of keys.

History

Extended in 8.5.1 (👉c851ee9) JSON writer for dicts now have a hook json_dict_pairs/2 that allows the user to select keys from the dict and particularly define the order of keys in the resulting JSON.