相关疑难解决方法(0)

这是我的代码,我认为它可能有一些错误:

        var bounds_array;
        google.maps.event.addListener(map,'bounds_changed', function (){
            var bounds_=map.getBounds();
            if(bounds_){
                var leftBottom=[bounds_.getSouthWest().lat(),bounds_.getSouthWest().lng()]
                var rightTop=[bounds_.getNorthEast().lat(),bounds_.getNorthEast().lng()]
                bounds_array=[leftBottom,rightTop];
            }
        });

    function check_is_in_or_out(marker){
        var leftBottom=bounds_array[0],rightTop=bounds_array[1];
        var marker_p=[marker.getPosition().lat(),marker.getPosition().lng()];
        if(marker_p[0]<leftBottom[0]||marker_p[0]>rightTop[0]||
            marker_p[1]<leftBottom[1]||marker_p[1]>rightTop[1])return 0;//0 is out
        else return 1;//1 is in
    }

这段代码是否足以检查边界是否存在？