1. Download the initial project project provided by Dark Horse 1. Search for dark horse programmers in WeChat 2. Enter the Black Horse Programmer applet The first method: directly enter the Black Horse Programmer applet / The second method: click on the information download in the dark horse resources in the service in the public […]
Tag: head
Java Head Song 9-4 Application of Abstract Classes
Level 1: multiple choice questions Task Description Tasks for this level: Complete multiple-choice questions about abstract classes and their applications. Related knowledge In order to complete this task, you need to master: 1. Abstract classes and abstract methods, 2. Issues to pay attention to in inheritance: such as calling constructors, method overriding, using objects of […]
Use opencv and dlib libraries (C++ code) to implement face liveness detection (blinking, mouth opening, shaking head detection)
Foreword This article uses opencv and dlib libraries, and uses C++ code to implement face detection, including blink detection, mouth opening detection, and shaking head detection, which can effectively distinguish static pictures from living objects. Effect display Dlib library introduction dlib is an open source C++ machine learning library that provides a series of algorithms […]
curl (2) HTTP protocol and headers
1 HTTP protocol related ① Force the request to http1.0 7.29 version ‘default’ is http1.1 ② Check whether the current curl version supports http2 Method ‘2’: curl –version to see ‘Features’ Supplement: ‘7.33.0’ version has only ‘introduced’ http2, and can use ‘curl’ to issue http2.0 version ‘requests’ ③ Forced to send http3 Instructions: Just ‘Understand’ […]
Solutions on the implementation of linked lists with head nodes (creation, intersection, union, difference)
This article uses .c files to call functions, and .h files to define the layout of functional functions. Because no other space is occupied when doing merge and intersection difference, after executing a function, the values of the two linked lists have changed and are no longer the original values, so after each function is […]
HTTP protocol request headers If-Match, If-None-Match and ETag
Overview In the HTTP protocol, the request headers If-Match, If-None-Match, If-Modified-Since, If-Unmodified -Since, If-Range are mainly request header standards defined to solve the problem of browser cache data. Correct judgment and use of these request headers in accordance with the protocol specifications can lead to more accurate Handle browser cache to improve system performance and […]
Serial communication (7) determines the data frame header to receive a string of data
This article is the original csdn first release of the blogger. I hope it will be helpful to you after reading it. Please correct me if I have any shortcomings! Let’s communicate and learn together and make progress together! > Posted by: @日月同光, symbiotic with me_SCM-CSDN Blog >You are welcome to like the original blogger […]
Crawl today’s headlines pictures (bs4 method)
Crawling today’s headline pictures (bs4 method) 1. Preliminary crawling Here we can easily figure out that the request method of this web page is a GET request. (Originally I planned to crawl beauties, but later I discovered that there would be image violations, so I changed it to crawling landscape images. To crawl beauties, you […]
numpy Head and Tail, attributes and underlying data, accelerated operations, binary operations, descriptive statistics, function application
Basic usage This section introduces the basic usage of Pandas data structures. The following code creates the sample data object used in the previous section: In [1]: index = pd.date_range(‘1/1/2000’, periods=8) In [2]: s = pd.Series(np.random.randn(5), index=[‘a’, ‘b’, ‘c’, ‘d’, ‘e ‘]) In [3]: df = pd.DataFrame(np.random.randn(8, 3), index=index, …: columns=[‘A’, ‘B’, ‘C’]) …: n=10 […]
el-table multi-level table header drag and drop
Scene The business needs to do multi-level header dragging. The specific requirements are as follows: A parent header without a child header cannot be dragged. The first serial number cannot be dragged. The parent header is transposed when dragged. When a child header under the same parent header is dragged, the child header is transposed. […]