[#BloombergLP-bdlc-CompactedArray-uniqueElement]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/CompactedArray.adoc[CompactedArray]::uniqueElement
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:mrdocs:

Return a `const` reference to the element at the specified `index` within the sorted sequence of unique element values in this object. The behavior is undefined unless `index < uniqueLength()`. Note that `uniqueElement(index)` and `operator` can return different objects.

== Synopsis

Declared in `<bdlc_compactedarray.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
TYPE const&
uniqueElement(std::size_t index) const;
----


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