Method containsElementNamed

inst/include/Rcpp/vector/Vector.h:583–592

* Does this vector have an element with the target name */

     *  Does this vector have an element with the target name
     */
    bool containsElementNamed( const char* target ) const {
          SEXP names = RCPP_GET_NAMES(Storage::get__()) ;
        if( Rf_isNull(names) ) return false ;
        R_xlen_t n = Rf_xlength(names) ;
        for( R_xlen_t i=0; i<n; i++){
            if( !strcmp( target, CHAR(STRING_ELT(names, i)) ) )
                return true ;
        }
        return false ;
    }

    R_xlen_t findName(const std::string& name) const {
        SEXP names = RCPP_GET_NAMES(Storage::get__());