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The inline function in Kotlin is still funWhy do I need inline functions?Lambda expressions are normally compiled into anonymous classes. This means that each time a lambda expression is called, an additional class is created. And if lambda captures a variable, a new object will be created every time it is called. This incurs additional runtim ...

Author: Alesksey Kadetov, Certified Rancher Operator: Level OneIn the past, poor canaries were used as test objects to test the content of methane in coal mines. Put the cage containing the canary into the mine with a rope for a period of time, and then pull it up. If the canary is still alive, the mine can be mined safely; If the Canary dies, ...

Topic expression As shown in the figure, FW1 and FW2 are active and standby HA, FW1 is active access, FW2 is standby access, FW3 and FW4 establish IPSec VPN tunnel with FW1 and FW2 through isp1 line. When isp1 line fails, use standby ISP2 line, FW1 and FW2 establish VPN tunnel, in which FW3 is located behind NAT equipment, and the external ...

main points Megahit introduction Basic assembly principle of Megahit Installation and use of Megahit Megahit actual combat hello, hello everyone. Today we bring you a super detailed installation and application tutorial about Megahit, a macro genome assembly tool. We will continue to bring you a series of articles on the analysis o ...

[quick reference manual of Linux common commands] pay attention to [entry station], and the background replies to "1001" for self access.lsof (list open files) is a tool to view the current system files. In the linux environment, everything exists in the form of files. Through files, you can access not only conventional data, but also ...

catalogue 1. requests headers Send request2. selenium simulation uses browser camouflage headers3. requests use ip Proxy send request4. selenium webdriver uses proxy ip In the process of writing crawlers, some websites will set up anti crawling mechanism to refuse to respond to non browser access; Or frequent crawling in a short time will ...

preface My story with topological sorting The first contact was the class of data structure. However, I was addicted to playing games and didn't understand the code at that time. The second time was the punch in group. The second question of a force deduction fortnightly competition was topological sorting (I used violence to cycle 100 times ...

Specify page number insert / replacepdfbox doesn't seem to provide this method specifically, but the existing methods can also realize this function by multiple combinations,Requirements: A pdf file A has 10 pages. Now I want to insert A new pdf file B on page 6. After insertion, the whole pdf file A becomes 11 pages.Train of thought 1 (insert) ...

catalogue 1, Introduction to Ethernet communication 1.OSI seven layer model 2. Ethernet packet analysis 3.IP header checksum calculation and inspection 2, Ethernet communication example 1. Overall experimental block diagram 2. Sequence diagram of transmission part 3. Experimental code and simulation results summary 1, Introduction ...

Each Vue instance must go through a series of initialization processes before being created. This process is the Vue life cycle. vue2. Lifecycle hook functions for 0 (10) beforeCreate: After instance initializationData observer and event/watcher events have not been configured yet. created: Called after the instance has been crea ...