Return true if this container has an element with key equivalent to key.
Declared in <bslstl_unorderedmultimap.h>
template<class LOOKUP_KEY>
bool
contains(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value &&
BloombergLP::bslmf::IsTransparentPredicate<EQUAL,
LOOKUP_KEY>::value;Return true if this unordered map contains an element whose key is equivalent to the specified key.
true if present, otherwise false
| Name | Description |
|---|---|
| key | transparent key value to look up |