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1.2 KiB
1.2 KiB
nlohmann::basic_json::find
template<typename KeyT>
iterator find(KeyT&& key);
template<typename KeyT>
const_iterator find(KeyT&& key) const;
Finds an element in a JSON object with key equivalent to key. If the element is not found or the JSON value is not an
object, end() is returned.
Template parameters
KeyT- A type for an object key.
Parameters
key(in)- key value of the element to search for.
Return value
Iterator to an element with key equivalent to key. If no such element is found or the JSON value is not an object,
past-the-end (see end()) iterator is returned.
Exception safety
Strong exception safety: if an exception occurs, the original value stays intact.
Complexity
Logarithmic in the size of the JSON object.
Notes
This method always returns end() when executed on a JSON type that is not an object.
Examples
??? example
The example shows how `find()` is used.
```cpp
--8<-- "examples/find__key_type.cpp"
```
Output:
```json
--8<-- "examples/find__key_type.output"
```
See also
- contains checks whether a key exists
Version history
- Added in version 1.0.0.