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Hello everyone, Lebyte's Xiaole is coming again. Where is less Xiaole shared by Java technology? Last time we said that. Extensible Markup Language XML II: XML Language Format Specification, Document Composition This article will focus on XML parsing.   There are two basic ways of parsing: SAX and DOM. SAX(Simple API for XML) i ...

We all know that using js to do arithmetic will definitely encounter the problem of accurate calculation (or rounding error), but how to avoid these pits, here is my plan from the Internet, welcome to discuss. Reasons for Accuracy Loss The binary implementation of a computer and the number limitation of digits can not be expressed in finite nu ...

One day, when you look back on the road you have traveled, you will find that these years of constant struggle are the best life. —— Freud Queue, FIFO for short, follows the principle of First In First Out. Contrary to the "stack", it adds elements at the end of the queue and deletes elements at the head of the queue. If t ...

Various monitoring tools Foreign linux Supervisory God: Baidu Search Brendan D. Gregg http://www.brendangregg.com/linuxperf.html I. hatop linux interactive process viewer supports mouse point, search and kill process, sorting, etc. It has quite powerful functions. https://www.cnblogs.com/enet01/p/8316006.html PID: Process flag number, non- ...

Articles Catalogue (1) Overview of ArrayList (2) Class names (3) Attributes (4) Construction method (5) Add Method (Expansion Operation) (6) Remove method (delete element) (7) Serialization (8) trimToSize() method (9) indexOf() method (10) toArray ...

introduce DelayQueue is a delayed blocking queue under concurrent packages in java, which is often used to implement timing tasks. Inheritance System As you can see from the inheritance system, DelayQueue implements BlockingQueue, so it is a blocking queue. In addition, DelayQueue combines an interface called Delayed, and all elements stored i ...

Note excerpts Crap: I have to marvel at the power of chain forward stars. Yesterday I learned how to sort the topology and understand the magic usage of head [] and next. I didn't expect that I could not build a map when I wrote a topic today. I le ...

Summary: The two core technologies of Spring Framwork are IOC and AOP. AOP is widely used in Spring's product line. If reflection is the basis for your access to advanced level, then the agent is the base for you to stabilize the advanced level. The essence of AOP is also known as CGLIB dynamic proxy technology. It must have been used more or l ...

I. 01 knapsack problemTitle Description: There are n items with wi and vi weight and value respectively. From these items, items with total weight not exceeding W are selected, and the maximum value of the total value in all the selection schemes is ...

Environmental description: host name Operating System Version ip docker version kubelet version To configure Remarks master Centos 7.6.1810 172.27.9.131 Docker 18.09.6 V1.14.2 2C2G Remarks node01 Centos 7.6.1810 172.27.9.135 Docker 18.09.6 V1.14.2 2C2G Remarks node02 Centos 7.6.1810 172.27.9.136 Docker 18.09.6 V1.14.2 2C2G Remarks ...