Return the number of matching keys

Synopsis

Declared in header </boost/url/params_encoded_base.hpp#L304[boost/url/params_encoded_base.hpp,window=blank_]>

size_t
count(
    pct_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, which may contain percent escapes. The comparison is performed as if all escaped characters were decoded first.

Example

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

Complexity

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

Exception Safety

Exceptions thrown on invalid input.

Return Value

  • size_t

Parameters

Name Type

key

pct_string_view

ic

ignore_case_param