[#BloombergLP-bdlc-FlatHashSet-count-00]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet]::count
:relfileprefix: ../../../
:mrdocs:

`count` overloads

== Synopses

Declared in `<bdlc_flathashset.h>`

Return the number of elements with the specified `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::size_t
xref:BloombergLP/bdlc/FlatHashSet/count-06.adoc[count](KEY const& key) const;
----

[.small]#xref:BloombergLP/bdlc/FlatHashSet/count-06.adoc[_» more..._]#

Return the number of elements equivalent to the specified `key`.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
std::size_t
xref:BloombergLP/bdlc/FlatHashSet/count-04.adoc[count](LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
         && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;
----

[.small]#xref:BloombergLP/bdlc/FlatHashSet/count-04.adoc[_» more..._]#

== Return Value

1 if `key` is present, and 0 otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key to count
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#