• From the data of e-commerce, how about the price of masks


    Hi, everyone. I’m a pig. Today, novel coronavirus is not a problem for leetcode, but rather a recent and disturbing thing. background Piggy is not a biology student or a medical student, so there is nothing we can do about the analysis of the virus itself or related paper reading. However, I believe that we […]

  • The method of adding color mask to background picture in CSS3


    Some time ago, in the development process, we met with projects that need to add color mask to the background layer. Now we will specifically summarize the method of adding color mask to the background layer. Method 1: stack by positioning (attention level) <div class=”wrap1″> <div class=”inner”> </div> </div> .wrap1 { position: relative; width: 1200px; […]

  • CSS realizes the effect of moving the mouse over the picture to show the mask layer


    1. Put the mask layer HTML code and image in a div I put it in. Img Gu Div. <div class=”img_div”> <img src=”./images/paella-dish.jpg”> <a href=”#”> <div class=”mask”> <h3>A Picture of food</h3> </div> </a> </div>   2. Style pictures and mask layers Picture: relative Mask layer: absolute Make both styles coincide. When the mouse is not […]

  • Python fast advanced 12 – Python + selenium + requests + pyqt production flash purchase tool


    During the epidemic prevention and control period, masks are too hard to buy. Try to make a rush to buy tool The combination of selenium and requests. The role of selenium: (1) The first use depends on the user’s manual login to obtain the cookie(2) Get the information of rush to buy goods The role […]

  • QR code details (2)


    Fast response matrix code (2) Take the book back and move on to the second half. Error correcting code QR code uses error correction algorithm to generate a series of error correction codewords, which are added after the data codeword sequence, so that the symbol can be recovered in case of damage. That’s why QR […]

  • MASK-RCNN(1)


    Mask-rcnn is a multi-purpose network, which can be used for target detection, instance segmentation or human posture recognition In short, we first use fast RCNN to get ROI, then use ROI align, then output ROI classification and partition mask 1. Fast RCNN and ROI align Faster RCNN is a two-stage detector. In the first stage […]

  • Realization of mask screen function in CSS3


    Recently, I saw a kind of bullet curtain effect on station B called intelligent anti blocking bullet curtain, which is the legendary mask bullet curtain. After opening, the effect is probably like this I don’t need to worry about whether the peerless face of the God Goddess is blocked by the gaudy barrage. It’s amazing. […]

  • Bit field isa pointer


    1、 Isa pointer structure union isa_t { isa_t() { } isa_t(uintptr_t value) : bits(value) { } Class cls; uintptr_t bits; #if SUPPORT_PACKED_ISA // extra_rc must be the MSB-most field (so it matches carry/overflow flags) // nonpointer must be the LSB (fixme or get rid of it) // shiftcls must occupy the same bits that a […]

  • Using div mask to solve the problem of invalid checkbox directly checked by mouse


    In the process of front-end development, there is a situation that needs to be checked. For the convenience of user operation, click event is put on Div. (knockout.js is used) The code is roughly as follows: Copy code The code is as follows: <div data-biind=”click:clickevent”> < input type = “checkbox” > < span > please […]

  • (transfer) go new file permission does not match the setting


    Original: https://blog.csdn.net/lipengfeihb/article/details/54415283 I. Problems fileName := “/Users/my/tests/perm_file” f, _ := os.OpenFile(fileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666) // code f.Close() The above code is to open a file. If the file does not exist, a new file will be created. At the same time, the permissions are set to 0666 (- RW RW RW RW -), but the permissions […]

  • Lenovo system x3650 setting management interface address


    1. Turn on the server. 2, display SetupWhen prompted, press F1. (this prompt is displayed on the screen for only a few seconds. F1 must be pressed quickly.) If both the power on password and the administrator password are set, you must enter the administrator password to access the full Setup Utility menu. 3. In […]

  • Explain Canvas-based Video Mask Plug-in


    Adding a cover to a video to block an area of the video, and not displaying the delimited area in a certain period of time, such as the 10th to 20th minutes. The application scenarios include occluding the guard view icon, occluding the advertisement in the lower right corner of the video, acting as mosaic, […]