If you wish to use a different equality function, you will also need to use a matching hash function. For example, to implement a case insensitive dictionary you need to define a case insensitive equality predicate and hash function:

An link:../../../benchmark/string_stats.cpp[example^] is provided that displays container statistics for `boost::hash<std::string>`, an implementation of the https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function#FNV-1a_hash[FNV-1a hash^] and two ill-behaved custom hash functions that have been incorrectly marked as avalanching:

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k);

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k);

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k);

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k); template<class K> const_iterator find(const K& k) const; template<typename CompatibleKey, typename CompatibleHash, typename CompatiblePredicate> iterator find(CompatibleKey const& k, CompatibleHash const& hash, CompatiblePredicate const& eq); template<typename CompatibleKey, typename CompatibleHash, typename CompatiblePredicate> const_iterator find(CompatibleKey const& k, CompatibleHash const& hash, CompatiblePredicate const& eq) const;

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k);

```c++ iterator find(const key_type& k); const_iterator find(const key_type& k) const; template<class K> iterator find(const K& k); template<class K> const_iterator find(const K& k) const; template<typename CompatibleKey, typename CompatibleHash, typename CompatiblePredicate> iterator find(CompatibleKey const& k, CompatibleHash const& hash, CompatiblePredicate const& eq); template<typename CompatibleKey, typename CompatibleHash, typename CompatiblePredicate> const_iterator find(CompatibleKey const& k, CompatibleHash const& hash, CompatiblePredicate const& eq) const;