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object::count

Count the number of elements with a specific key.

Synopsis
std::size_t
count(
    string_view key) const;
Description

This function returns the count of the number of elements match key. The only possible return values are 0 and 1.

Complexity

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

Exception Safety

No-throw guarantee.

Parameters

Name

Description

key

The key of the element to find.


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