returns the number of occurrences of a key in a JSON object
Synopsis
Declared in <nlohmann/json.hpp>
template<class KeyType>
requires detail::is_usable_as_basic_json_key_type<basic_json_t, KeyType>::value
size_type
count(KeyType&& key) const;Return Value
number of occurrences of the key (0 or 1 for a JSON object, 0 for all other types)
Parameters
Name |
Description |
key |
key to count occurrences of |
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