[#BloombergLP-bslstl-operator_not_eq-065]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::operator!=
:relfileprefix: ../../
:mrdocs:

Return `true` if the specified `lhs` and `rhs` objects do not have the same value, and `false` otherwise. Two `HashTable` objects do not have the same value if they do not have the same number of elements, or if, for any key found in `lhs`, the subset of elements having that key (according to the hash‐table's `comparator`) in `lhs` either (1) does not have the same number of elements as the subset of elements having that key in `rhs`, or (2) there exists no permutation of the `lhs` subset where each element compares equal (using `operator==`) to the corresponding element in the `rhs` subset. The behavior is undefined unless both the `hasher` and `comparator` of `lhs` and `rhs` return the same value for every valid input. Note that this method requires that the `ValueType` of the parameterized `KEY_CONFIG` be "equality‐comparable" (see {Requirements on `KEY_CONFIG`}).

== Synopsis

Declared in `<bslstl_hashtable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class KEY_CONFIG,
    class HASHER,
    class COMPARATOR,
    class ALLOCATOR>
bool
operator!=(
    xref:BloombergLP/bslstl/HashTable-06.adoc[HashTable<KEY_CONFIG, HASHER, COMPARATOR, ALLOCATOR>] const& lhs,
    xref:BloombergLP/bslstl/HashTable-06.adoc[HashTable<KEY_CONFIG, HASHER, COMPARATOR, ALLOCATOR>] const& rhs);
----


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