• Quickly locating and eliminating dependency conflicts through idea


    Preface Our programmers often encounter a variety of bug problems during development, most of which are business logic exceptions, and some of which are caused by code writing irregularities, such as nullpointexception (NPE), indexoutofboundsexception, etc., which we are good at locating and repairing. But there are also some runtime exceptions that are particularly troublesome to […]

  • CSS vertical center scheme


    Several methods of vertical center HTML structure Vertical centering css .container { width: 500px; height: 500px; border: 1px solid #000; position: relative; } 1. Use flex layout Set in parent container .container{ displayy: flex; justify-content: center; align-items: center } 2. Absolute positioning It can be divided into two cases: known width and height and unknown […]

  • Exploration and practice of Gaud in improving positioning accuracy


    At the 2019 Hangzhou cloud habitat conference, the map technology team of Gaode shared with the participants many hot topics in the field of travel technology, including vision and machine intelligence, route planning, scenario / fine positioning spatiotemporal data application, and evolution of billion level traffic architecture. The scene was very hot and the audience […]

  • Anchor link to another page


    Preface Pug + jQuery is the latest official website updateOne requirement is to click the top navigation to jump to the designated location of another page, as shown in the following figureWhen I click content1, I will jump to the position of content1 in the page. Others are similar Implementation process It’s easy to use […]

  • Details of nginx location rewrite


    location Start with = for exact match; if only the request at the end of the root directory is matched, no string can be followed.Starting with ^ ~, indicates that the URI starts with a regular string. If it matches to, it will not continue to match. Not a regular matchStarts with ~ to indicate […]

  • Tips for mobile development


    Preface Recently, I wrote a hybrid app project in the company. The pages are basically completed in H5 and embedded in the native WebView. I found a problem. Under iPhone 6, the status bar of Apple’s mobile phone will block the page, causing the page to move down and the style to be disordered. Finally, […]

  • IOS ——– summary of wild pointer positioning


      Summary of IOS wild pointer positioning

  • Div horizontal center under fixed positioning


    Find a previously unnoticed knowledge point and take a note. When the parent element of a block level element has flex layout enabled, we can easily center and align this element, and add justify-content: center; Align items: Center; / * center under single line*/ or justify-content: center; align-content: center; Flex Wrap: wrap; / * center […]

  • Evolution of target detection technology: from r-cnn to faster r-cnn


    Abstract:One article to understand the development of target detection technology, do not miss yo. The purpose of object detection is to find the position of the object in a given picture accurately and classify it correctly. Accurately speaking, target detection needs to determine what the target is and locate it. However, it is not easy […]

  • Large-scale production of high-precision maps in automatic driving: application of visual inertial navigation technology in Gaode


    Guide readingThe continuous development of navigation, driving assistance and automatic driving technology has put forward higher requirements for map precision. Conventional road-level maps have many shortcomings for intelligent transportation systems. To meet the requirements of automatic driving applications, we propose a method of making high-precision maps using visual inertial navigation technology. Firstly, this paper introduces […]

  • [original] IOS search private API


    New projects tend to herald a host of problems. Problem solving is often the time to learn more, which may be the most direct and fast way to learn new things.Xiaobian made great efforts to test the new project, but was rejected by Apple. It’s so bitter. There’s really no one in the latest audit. […]

  • HTML-Location excerpt _017


    Extraction of HTML-Location LocationAn interface represents the location of the object to which it is linked.URL。 The changes are reflected in the objects associated with them.DocumentandWindowAll interfaces have such a link.LocationThroughDocument.locationandWindow.locationVisit. attribute LocationInterfaces do not inherit any attributes, but implement those fromURLUtilsProperties. Location.href One that contains the entire URLDOMString // https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/href console.log(location.href) // https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/href Location.protocol […]