cursor

I want JavaScript code to detect the cursor type. For example when the cursor hovers in textarea it changes from default to text .. You could do this, but its not pretty, and will probably be quite slow depending on how many elements you have on your page. $('*').mouseenter(function(){ var currentCursor = $(this).css('cursor') ; //do what you want here, i.e. console.log( currentCursor ); }); You can detect the cursor type using JavaScript like <input id="sample_text" name="one" type="text" value="Sample Text" /> and the JavaScript code should look something like this $('input[id=sample_text]')

The PHP documentation for the mongo class says using a cursor instead of iterator_to_array is superior. Why? What benefits/flexibility will I get from that? CamilleLDN Using iterator_to_array() makes your driver load all of the results into memory at once, and you could easily run out of memory. This would not be the case with a cursor, which uses lazy-loading! Straight from the linked docs : <?php $cursor = $collection->find(); var_dump(iterator_to_array($cursor)); ?> ... Suppose that, in the example above, $collection was a 50GB collection. We certainly wouldn't want to load that into memory

how do you set a custom cursor for the current page from a local image file? basically I need to change to a different cursor programmatically using javascript, but the cursor is stored locally on my hard drive. You can't ( but see below ), because the file:// cannot be accessed or referred from other protocols. The basic way to include a cursor through JavaScript is: element.style.cursor = "url(...location-of-pic...), auto"; // ^^^^^^ (required as fallback) You can convert your image to a base64-dataURI , and use it instead of file://..../cursor.png : document.documentElement.style.cursor =

查看碎片情况使用 dbcc showcontig 函数来进行 代码: --改成当前库 use DB_Name --创建变量 指定要查看的表 declare @table_id int set @table_id=object_id('TableName') --执行 dbcc showcontig(@table_id) 返回结果: 上边实例的表比较大..一张表占用的实际物理空间就有24个G(数据20G+ 索引2G+ ).. 以下是名词解释: DBCC SHOWCONTIG是显示指定的表的数据和索引的碎片信息。 解释如下： Page Scanned-扫描页数：如果你知道行的近似尺寸和表或索引里的行数，那么你可以估计出索引里的页数。看看扫描页数，如果明显比你估计的页数要高，说明存在内部碎片。 Extents Scanned-扫描扩展盘区数：用扫描页数除以8,四舍五入到下一个最高值。该值应该和DBCC SHOWCONTIG返回的扫描扩展盘区数一致。如果DBCC SHOWCONTIG返回的数高，说明存在外部碎片。碎片的严重程度依赖于刚才显示的值比估计值高多少。 Extent Switches-扩展盘区开关数：该数应该等于扫描扩展盘区数减1。高了则说明有外部碎片。 Avg. Pages per Extent-每个扩展盘区上的平均页数：该数是扫描页数除以扫描扩展盘区数，一般是8