lag

问题 Note: I am using SQL Server 2008 R2 and built in LEAD/LAG functions are not available. I need to update a table's column to contain the 'previous' and 'next' values for ProductID - the table needs to store PrevProductID (LAG), ProductID and NextProductID (LEAD). The code below does this very nicely and was adapted from Geri Reshef's answer to http://blog.sqlauthority.com/2011/11/24/sql-server-solution-to-puzzle-simulate-lead-and-lag-without-using-sql-server-2012-analytic-function/ USE

问题 I'm making a simple Android game with Java. I noticed some annoying lags every 20-40 seconds. First I thought they we're caused by the Garbage Collector, but as I checked my LogCat I saw that there's no Garbage Collection at the time the game lags. I marked the log everytime the game begans to lag and saw that there's almost everytime this log entry: W/qdhwcomposer(209): Excessive delay reading vsync: took 47 ms As it says, there is a delay (usually >45ms) and i think that's what I notice as

问题 Now I'm using this code, with a little modification: if (self._photoPath && !self._photo) { dispatch_queue_t bg_thread = dispatch_queue_create("com.yourcompany.bg_thread", NULL); dispatch_queue_t main_queue = dispatch_get_main_queue(); dispatch_async(bg_thread,^{ NSData *data = [NSData dataWithContentsOfFile:self._photoPath]; if(data != nil) { dispatch_async(main_queue,^{ self._photo = [UIImage imageWithData:data]; [self.photoButton setImage:[UIImage imageNamed:@"photoButton.png"] forState

问题 I developed a little script that make texts like they were coming from far, with Jquery and animate() function. Everything works well in IE and FireFox but on Chrome is very laggy, like it was loosing frames. You cand test and play with the code here: http://jsbin.com/ehahoc/7/ Many thanks! 回答1: I check the source and i something that mite couse the problem... Form firefox the font size and the opacity values are 0.0000 (4 digits) and in chrome... 0.000000000000 (12-14 digits) and the

问题 UIGraphicsBeginImageContext(self.view.bounds.size); [currentStrokeImageView.image drawInRect:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)]; CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetBlendMode(UIGraphicsGetCurrentContext(), kCGBlendModeNormal); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), dWidth); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), r, g, b, 1.0f); CGContextBeginPath(UIGraphicsGetCurrentContext(

问题 Im having a simple JFrame which draws a background color. But when i resize the window, the background color is somehow lagging, as you can see in the screenshot. Is there a way to prevent this issue? public class ToolBarTest extends JFrame{ public ToolBarTest(){ getContentPane().setBackground(new Color(221,221,221)); setSize(400,250); setTitle("Hello"); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String ... args){ new ToolBarTest().setVisible(true); } }

问题 I recently asked about how to add cookies to a sidebar menu, and got help by amazing Trincot, here. Found and edited another code to get that to work, now the problem with that code is that it the cookies lag - if you close the sidebar and move to another page, it shows up for a second, then disappears, and considering the entire site's content moves with it, this is incredibly annoying. I think I found a similar question while looking for solution to my previous problem, but I can't remember

问题 I need help computing a date difference across different rows with variable lag (specifically, rows that are not on the same day) without subqueries, joins, etc. I think this should be possible with some inline t-SQL aggregates that use OVER(PARTITION BY) clause, such as LAG , DENSE_RANK , etc., but I can't quite put a finger on it. This is for a SQL Server 2017 Developer's edition. A clarifying example: Consider a dataset with Job beginning and end dates (across various projects). Some jobs

问题 This is a similar scenario to SQL: Count of rows since certain value first occurred In SQL Server, I'm trying to calculate the count of days since the same weather as today (let's assume today is 6th August 2018) was observed first in the past 5 days. Per town. Here's the data: +---------+---------+--------+--------+--------+ | Date | Toronto | Cairo | Zagreb | Ankara | +---------+---------+--------+--------+--------+ | 1.08.18 | Rain | Sun | Clouds | Sun | | 2.08.18 | Sun | Sun | Clouds |

问题 I have a ListView with custom items, like this one: The grey square is an ImageView. The data to fill the ListView comes from a database in the form of a Cursor. But the images are not directly stored in the database, but in the SDCard, the database only holds a String reference to them. In the beginning I was decoding the Image into a Bitmap from the overriden CursorAdapter's bindView() callback method: Bitmap bmp = BitmapFactory.decodeFile(imageLocation); holder.imageHolder.setImageBitmap