[#BloombergLP-bdlc-operator_not_eq-01f]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::operator!=
:relfileprefix: ../../
:mrdocs:

Return whether two sets do not have the same value.

== Synopsis

Declared in `<bdlc_flathashset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class KEY,
    class HASH,
    class EQUAL>
bool
operator!=(
    xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet<KEY, HASH, EQUAL>] const& a,
    xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet<KEY, HASH, EQUAL>] const& b);
----

== Description

Return `true` if the specified `a` and `b` objects do not have the same value, and `false` otherwise. Two `FlatHashSet` objects do not have the same value if their sizes are different or one contains an element equal to no element of the other. The hash and equality functors are not involved in the comparison.

== Return Value

`true` if `a` and `b` differ, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| first set to compare
| *b*
| second set to compare
|===


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