The difference and thinking between headline sub database, sub table and partition. Can you understand MySQL? It's too realistic

This is distributed by the database. The application is transparent. There is no need to modify anything in the code. 2.2 internal documents Go to the data directory first. If you don't know the directory location, you can: Next, look at the internal files: As can be seen from the above figure, there are two types of files frm files and ...

Posted by powerofphp on Thu, 06 Jan 2022 00:51:56 +0100

Java theoretical knowledge thinking map, bye! Pure Java management system

Add the Java configuration class EruptConfig of Erupt, subject to the package of starting MallTinyApplication, and configure the package scanning path; /** * Created by macro on 2021/4/13. */ @Configuration @ComponentScan({"xyz.erupt","com.macro.mall.tiny"}) @EntityScan({"xyz.erupt","com.macro.mall.tiny"}) @EruptScan({"xyz.erupt","c ...

Posted by ganich on Wed, 05 Jan 2022 22:07:49 +0100

[interview classic] detailed explanation of ArrayList

Due to the long length of this article, in order to facilitate everyone's reading and collection, this article has been specially transformed into a PDF document. click Download Java learning manual, pdf tutorial. 1. Collection overview Collections in Java are mainly divided into three categories: List: sequential and repeatable.Set: no sequ ...

Posted by grimmier on Wed, 05 Jan 2022 21:54:45 +0100

The six most popular questions for interviewers are clear float and BFC

prefaceHello, I'm Lin Sanxin. Clearing the float is the most frequently asked question in CSS during the interview. When the interviewer asks you how to clear the float, he certainly doesn't want you to simply answer the method of clearing the float, but wants you to answer the BFC. Even if he doesn't want you to answer, you should take the ini ...

Posted by slamMan on Wed, 05 Jan 2022 11:21:05 +0100

[rigong's attack on the big factory series] don't jump into the interview trap of ArrayList

background Yesterday, Xiao Feng received an interview call from a company. One of the interview questions was a little interesting. I'll share it with you here. The interview question is how to delete the specified element in ArrayList. At first glance, it sounds like a simple question, but if you don't actually step on the pit, you can easi ...

Posted by fredley on Tue, 04 Jan 2022 23:37:36 +0100

The interviewer asks you JVM, do you know where the bonus item is?

introduction In the process of interviewing others, the JVM memory model almost needs to be asked, although some people say that these are the interview to build an aircraft carrier and screw up the work. If you want to be a CRUD coder, you can choose not to know this. In the question and answer of JVM memory model, some people can say that o ...

Posted by msk_1980 on Tue, 04 Jan 2022 20:49:13 +0100

Daily question: 3 SQL data analysis questions (including data and code) that are almost necessary for the interview

The daily question selects the frequently asked interview questions, summarizes them into a column, and uses spare time to escort the career. It is recommended that you think and answer the questions independently. Hello, in the process of data job recruitment, we often investigate the SQL ability of job seekers. Here are three frequently test ...

Posted by dennismonsewicz on Tue, 04 Jan 2022 19:43:05 +0100

make and makefile file format of Linux

Another solution is to escape with a backslash before the newline character. var-kept: export foo<span class="token operator" style="margin: 0px; padding: 0px; list-style-type: none; border: none; color: rgb(166, 127, 89);">=</span>bar<span class="token punctuation" style="margin: 0px; padding: 0px; list-style-ty ...

Posted by jaxxstorm on Tue, 04 Jan 2022 15:31:49 +0100

Binary tree and path for a certain value - byte jump written test programming C/C++

Title Description Enter the root node root and an integer expectNumber of a binary tree to find all paths where the sum of node values in the binary tree is expectNumber. 1. The problem path is defined as the node from the root node of the tree to the leaf node (cat bin roars and prompts: pay great attention here - you must go to the leaf no ...

Posted by ziltech on Tue, 04 Jan 2022 15:25:56 +0100

Double non slag Java, grinding a sword in four years, GC Roots interview

As shown in the following code, a is a local variable in the stack frame. When a = null, because a acts as a GC Root, a is disconnected from the instance new Test(), so the object will be recycled. publicclass Test { public static void main(String[] args) { Test a = new Test(); a = null; } } 2. The object referenced by the ...

Posted by Scutterman on Tue, 04 Jan 2022 14:35:50 +0100