getting big lag with scroll()

问题内容: I’m trying to animate my menu with jquery – simply change padding depending on scroll. It works fine, however takes extremely long to execute (1-10 seconds). Any ideas? I have tried .on(‘scroll’) but no change. Both on Chrome and Firefox. Fun thing – if I add alert(v); after 3rd line to be sure on

How to use single transactions for multiple statements?

问题内容: I have a function which makes N statements, the problem is that they are not in a single transaction and its really slow. this._db.exec("BEGIN TRANSACTION;"); for (let i = 0; i < data.length; i++) { let obj = data[i]; let inserStatement = ` INSERT INTO TableTest1236 (UID, DirectoryTreeHID, ProductDimensionUID, Active, SortOrder, LastEditOn, ColorID, PlaceHolder,

How do I fix android.os.NetworkOnMainThreadException?

问题内容: I got an error while running my Android project for RssReader. Code: URL url = new URL(urlToRssFeed); SAXParserFactory factory = SAXParserFactory.newInstance(); SAXParser parser = factory.newSAXParser(); XMLReader xmlreader = parser.getXMLReader(); RssHandler theRSSHandler = new RssHandler(); xmlreader.setContentHandler(theRSSHandler); InputSource is = new InputSource(url.openStream()); xmlreader.parse(is); return theRSSHandler.getFeed(); And it shows the below error: android.os.NetworkOnMainThreadException How can I fix

How to handle “gd-png: fatal libpng error: Read Error: truncated data” in php 7

问题内容: I use php 7.0.22 (Ubuntu 17.04) When some user upload PNG with truncated data and i use: $a = imagecreatefrompng($path); then I get crash with: Fatal error: imagecreatefrompng(): gd-png: fatal libpng error: Read Error: truncated data in ###.php on line ### I try to use try{...code...}catch(\Throwable $e){...echo...}. and $a = @imagecreatefrompng($path); But script just

Sparql Query Vizualization

question contest: i’m currently working on a visualizer for SPARQL-queries. Yes, the focus lies on the visualization of the queries and not the results. It might be easy to visualize the results of a query, but how to visualize the query itself when you have more complicated features to consider like filters, group by’s etc..