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(Inherited from params_base
)
Return the number of matching keys.
std::size_t count( string_view key, ignore_case_param ic = {}) const;
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.
assert( url_view( "?first=John&last=Doe" ).params().count( "first" ) == 1 );
Linear in this->buffer().size()
.
Throws nothing.
Name |
Description |
---|---|
|
The key to match. By default, a case-sensitive comparison is used. |
|
An optional parameter. If the value |