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preface This film starts to consolidate the basic knowledge of JavaScript from scratch. Before learning, it gulps down all kinds of problems in the later projects and learning; Starting from this note, slow down and understand JavaScript well, so as to lay a solid foundation for promotion and salary increase in the future. 1, Annotation Ther ...

        1. background When the two sides interact with each other through the HTTP network protocol, the sender often serializes the Json object data into a string (ObjectMapper.writeValueAsString(Object value)), while the receiver often deserializes the received string data into a Json object (object ...

GDB debugging gdb basic command summary commandFile < file name >Load the debugged executable filerunSingle step execution: run the program and stop at the first execution statement. If the executable program needs to pass parameters, it can be written after runlistView the source code, abbreviated as lsetSet the value of the variab ...

Today, I saw an interesting effect on CodePen-- GSAP 3 ETC Variable Font Wave , with the help of JS animation library GSAP, let's take a look:I wondered if I could use CSS to reproduce a version. After a while, I successfully realized the original effect with pure CSS.The core of the above effect is the animation of text, which changes from thi ...

summary I iterator What is an iterator Iterators are container data typesFeatures: unable to view elements and count the number of elements through the print iterator;When you need to use an element, you must take the element out of the iterator. After taking it out, the element disappears from the iterator Create iterator - converts ot ...

1. Introduction The test templates / in helm chart is located in this directory and is a job definition that specifies the container with the given command to run. The container should exit successfully (exit 0), and the test is considered successful. Job definition: Helm sh/hook: test. Note that before Helm v3, the job definition needs ...

(this article and each subsequent article have such a structure. First, we will talk about the logical structure, then preliminarily understand the physical structure, then realize the code, and finally re understand the advantages and disadvantages of the physical structure in combination with the code. The code of this chapter and the exer ...

Sword finger offer Second Edition 1. Duplicate numbers in the array (Offer-03) Use both sets and dictionaries. var findRepeatNumber = function(nums) { let map = new Set() for(let i = 0; i < nums.length; i++) { const n = nums[i] if(map.has(n)) { return n } map.add(n) } }; 2. Search ...

1, Read and return html tree from URL 1.1 rcull package Using the Rcurl package, you can easily send requests to the server and capture URI, get and post forms. It provides a higher level of interaction than R socket connection, and supports FTP/FTPS/TFTP, SSL/HTTPS,telnet and cookies. The functions used in this article are basicTextGatherer an ...

In Python interactive mode, you can directly execute the corresponding script without Python interpreter. 1. 1) How to open interactive mode: Under Windows: Find "command prompt" in the start menu and open it to enter the command line mode: Enter Python in the command line mode to enter the interactive mode of Python Under Linux: D ...