Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Find an element with a specific key.

object::iterator
find(
    string_view key) noexcept;

This function returns an iterator to the element matching key if it exists, otherwise returns end().

Constant on average, worst case linear in size().

No-throw guarantee.

Name	Description
`key`	The key of the element to find.