Function params_base::count

Return the number of matching keys

Synopsis

Declared in header <boost/url/params_base.hpp>

std::size_t
count(
    core::string_view key,
    ignore_case_param ic = = {}) const noexcept;

Description

This function examines the parameters in the container to find the number of matches for the specified key. The comparison is performed as if all escaped characters were decoded first.

Example

assert( url_view( "?first=John&last=Doe" ).params().count( "first" ) == 1 );

Complexity

Linear in this->buffer().size().

Exception Safety

Throws nothing.

Parameters

Name Description

key

The key to match. By default, a case-sensitive comparison is used.

ic

An optional parameter. If the value ignore_case is passed here, the comparison is case-insensitive.