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Exercise 8: More redirection and filtering: head, tail, awk, grep, sed Original text: Exercise 8. Bash: more on redirection and filtering: head, tail, awk, grep, sed Translator: Flying dragon Agreement: CC BY-NC-SA 4.0 Take pride in adopting Google translation Now that you've tried Linux, I'll show you how Unix works. Wat ...

1.Integer Factorization Description: The basic theorem of the algorithm is that any integer can be expressed as the product of one or more prime numbers, such a representation is unique, for example: 1000 = 2 * 2 * 2 * 5 * 5 * 5 1001 = 7 * 11 * 13 1002 = 2 * 3 * 167 1003 = 17 * 59 1009 = 1009 Problem statement: You'll get a few numbers and de ...

In this article, we will talk about the observer model, which is used frequently in real projects. The most commonly used parts of the observer model are GUI system, subscription-publishing system and so on. Because an important role of this model is decoupling, so that they rely less on each other, or even do not rely on each other. For GUI s ...

Title Link https://www.luogu.org/problem/show?pid=1311#sub Title Description There are n distinctive Inns along the Lijiang River. The inns are numbered from 1 to N in order of their location. Each inn is decorated according to a certain color (a total of k, expressed in integer 0 - K - 1), and each inn has a coffee shop, each of which has i ...

On the front-end player on one song, the next song, playlist addition, deletion, modification, check and so on, today to give you a detailed explanation of the logic implementation. Add to ListIdea: Use arrays, add program names to arrays, by judging arrays to achieve, on the code var idList = [] , //Program Array First var an empty array ...

What are the general ways to implement distributed locks?How do I design distributed locks using redis?Is it okay to use zk to design distributed locks?Which of these two distributed locks is more efficient?     (1) redis distributed lock   Officially known as the RedLock algorithm, it is an officially supported distributed lo ...

The source code of the last article is very boring. The official documents are as bad as black cotton. This article talks about the implementation of timestamp on windows operating system. Because of class declaration and method interpretation, the previous one has been pasted, so this time it directly corresponds to the corresponding version o ...

meet Part One In this article, we use programmable WebSocket to implement the previous example:Server Endpoint, no longer using the Server Endpoint annotation:public class ProgramerServer extends Endpoint {     @Override     public void onOpen(Session session,  ...

Recently, the course is a little tight, so I put aside the study of SSH temporarily, and wait a little less time to start the follow-up of SSH blog. This semester's JAVA course has learned the chapters of graphical user interface, and began to contact awt and swing learning. I want to use the knowledge I learned to design a login interface th ...

introduce This is the third reading note (introduction to soul) of the Red Treasure Book (3rd edition of JavaScript Advanced Programming). It has the knowledge content of the remaining 3rd chapter. Of course, it also has my own understanding. Red Treasure Book can be said to be difficult to gnaw, it is not easy to read, rather thick, to unders ...