JSON for Modern C++  3.5.0

◆ find() [2/2]

template<template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE=void > class JSONSerializer = adl_serializer>
template<typename KeyT >
const_iterator nlohmann::basic_json::find ( KeyT &&  key) const
inline

find an element in a JSON object 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.

Note
This method always returns end() when executed on a JSON type that is not an object.
Parameters
[in]keykey value of the element to search for.
Returns
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.
Complexity^^ Logarithmic in the size of the JSON object.
Example^^ The example shows how find() is used. ^^ find__key_type.cpp
Output (play with this example online):^^
"two" was found: true
value at key "two": 2
"three" was found: false
^^ The example code above can be translated with
g++ -std=c++11 -Isingle_include doc/examples/find__key_type.cpp -o find__key_type 
Since
version 1.0.0

Definition at line 16312 of file json.hpp.