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(Inherited from params_base
)
Return true if a matching key exists.
bool contains( string_view key, ignore_case_param ic = {}) const;
This function examines the parameters in the container to find a match for the specified key. The comparison is performed as if all escaped characters were decoded first.
assert( url_view( "?first=John&last=Doe" ).params().contains( "first" ) );
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 |