Json.contains

bool contains(const Str& key) const noexcept;

Checks if an Obj contains the specified key, returns false for non-object types.

Return Value - Obj: Result of underlying contains() call - Other types: false

Exception Safety
No-throw guarantee

Complexity - Ordered map (std::map): O(log n) - Hash map (std::unordered_map): Average O(1)

Version

Since v3.0.0 .